Presentations

157. Designing chromophores to uncover novel excited state reactivity. 14th Encuentro Latinoamericano de Fotoquímica y Fotobiología, XIV ELAFOT, Viña del Mar, Chile. Nov 11-14, 2019. (Plenary talk by Jayaraman Sivaguru on Nov 12, 2019).
158. Uncovering Novel Excited State Reactivity Of Organic Molecules. 2019 International Conference in Photochemistry, Boulder, CO, USA. Jul 21-27. (presentation by Jayaraman Sivaguru on Jul 25, 2019).
159. “Tailoring biomass for photochemical applications’’ Singathi, R.; Clay. A.; J. Sivaguru, OHIO PHOTOCHEMICAL SOCIETY (OoPS) MEETING, Maumee, Oregon, OH May 31-June 02, 2019. (Poster presentation by Ravichandranath Singathi on June 01, 2019).
160. “Enamides as a versatile template for uncovering new photochemical pathways” Kandappa. S. K.; Kumaraswamy. E.; Raghunathan. R.; Jockusch. S and Sivaguru. J. – OHIO PHOTOCHEMICAL SOCIETY (OoPS) MEETING, Maumee, Oregon, OH May 31-June 02, 2019. (Poster presentation by Sunil Kumar Kandappa on June 01, 2019).
161. “Photo-Auxiliary Approach To Control Excited State Reactivity: Cross [2+2]-Photocycloaddition Of Oxazolidinone Based Hydrazides” Ahuja, S.; Iyer, A.; Kandappa. S. K and Sivaguru. J. – OHIO PHOTOCHEMICAL SOCIETY (OoPS) MEETING, Maumee, Oregon, OH May 31-June 02, 2019. (Poster presentation by Sapna Ahuja on June 01, 2019).
162. Manipulating Excited State Chemistry through Non-Bonding Effects Transformations. 2019 ACS-Great Lakes Regional meeting, Chicago. IL. May 1-May4 2019. (presentation by Jayaraman Sivaguru on May 2, 2019).
163. Tailoring Biomass for Photochemical Applications. Singathi, R*, Clay, A. Sibi. M. P., Webster. D., and J. Sivaguru, 28^th INTER-AMERICAN PHOTOCHEMICAL SOCIETY MEETING, Lido Beach Resort, Sarasota, FL, January 2-5, 2019. (Poster presentation by Ravichandranath Singathi on Jan 2-4, 2019).
164. Realizing the Photo-Ene Reaction with alkenes with visible light irradiation and bypassing the favored [2+2]- photocycloaddition, Ahuja, S*, Raghunathan, R, Kumarasamy, E, Jockusch, S and J. Sivaguru. 28^th INTER-AMERICAN PHOTOCHEMICAL SOCIETY MEETING, Lido Beach Resort, Sarasota, FL, January 2-5, 2019. (Poster presentation by Sapna Ahuja on Jan 2-4, 2019).
165. Enamides as a versatile template for uncovering new photochemical pathways. Kandappa, S*, Raghunathan, R, Kumarasamy, E, Jockusch, S, and J. Sivaguru. INTER-AMERICAN PHOTOCHEMICAL SOCIETY MEETING, Lido Beach Resort, Sarasota, FL, January 2-5, 2019. (Poster presentation by Sunil Kumar Kandappa on Jan 2-4, 2019).
166. Lighting the way for a sustainable future. Marquette University Rajendra Rathore Symposium, Milwaukee, WI. Oct 18-19, 2018. (presentation by Jayaraman Sivaguru on Oct 19, 2018).
167. Manipulating Light Induced Transformations Using Molecular Restrictions. PhotoIUPAC conference, Dublin, Ireland. July 8-13, 2018. - (presentation by Jayaraman Sivaguru on July 10, 2018).
168. Controlled Photodegradation of Biomass derived polymers. Singathi. R*, Raghunathan. R, Sibi. M. P., Webster. D., and J. Sivaguru, OHIO PHOTOCHEMICAL SOCIETY (OOPS) MEETING, Maumee, Oregon, OH May 31-June 02, 2018. (Poster presentation by Ravichandranath Singathi on June 01, 2018).
169. Photo-Ene Reaction: Bypassing the favored [2+2]-Photocycloaddtion. Sapna Ahuja, J. Sivaguru*. OHIO PHOTOCHEMICAL SOCIETY (OOPS) MEETING, Oregon, OH, May 31-June 02, 2018. (Poster presentation by Sapna Ahuja on Jan 01, 2018)
170. Aza Paternò-Büchi reaction. Kandappa, S*, Raghunathan, R, Kumarasamy, E, Jockusch, S, and J. Sivaguru. OHIO PHOTOCHEMICAL SOCIETY (OOPS) MEETING, Oregon, OH, May 31-June 02, 2018. (Poster presentation by Sunil Kumar Kandappa on Jan 01, 2018).
171. Manipulating Excited State Reactivity Through Molecular Chirality JayaramanSivaguru 2018 Symposiym on Molecular Chirality,Chiba, Japan May 11-12- (Plenary lecture by Jayaraman Sivaguru on May 12, 2018).
172. Controlled Photodegradation of Biomass derived polymers". Singathi. R, Raghunathan. R, Sibi. M. P., Webster. D., and J. Sivaguru, OHIO PHOTOCHEMICAL SOCIETY (OOPS) MEETING, Maumee, Oregon, OH May 31-June 02, 2018. (Poster presentation by Ravichandranath Singathi on June 01, 2018).
173. Aza Paternò-Büchi reaction. Sunil Kumar Kandappa, Elango Kumarasamy, Ramya Raghunathan, Steffen Jockusch and J. Sivaguru OHIO PHOTOCHEMICAL SOCIETY (OOPS) MEETING, Maumee, Oregon, OH May 31-June 02, 2018. (Oral and Poster presentation by Sunil Kumar Kandappa on June 01, 2018).
174. Photo-Ene Reaction: Bypassing the favored [2+2]-Photocycloaddtion. Sapna Ahuja, J. Sivaguru*. OoPS conference, Maumee, Ohio. May 31- June 2, 2018 (Poster presentation).
175. Aza Paternò-Büchi reaction. Sunil Kumar Kandappa, Elango Kumarasamy, Ramya Raghunathan, Steffen Jockusch and J. Sivaguru INTERNATIONAL AMERICAN PHOTOCHEMICAL SOCIETY MEETING, SARASOTA, FLJanuary 2-5, 2018. (Poster presentation by Sunil Kumar Kandappa on January 3, 2018).
176. Photoene Vs [2+2] photocycloaddition – A case study involving maleimides and alkenes. Sapna Ahuja, J. Sivaguru*. IAPS meeting, Sarasota, Flordia. January 2-5, 2018. (Poster presentation by Sapna Ahuja).
177. Controlled Photodegradation of Biomass derived polymers". Singathi. R, Raghunathan. R,Sibi. M. P., Webster. D., and J. Sivaguru, 27 th INTER-AMERICAN PHOTOCHEMICAL SOCIETY MEETING -Sarasota, FL, January 02-05, 2018 (poster presentation by Ravichandranath Singathi on January-2, 3,2018.
178. Controlled Photodegradation of Biomass derived polymers". Singathi. R, Raghunathan. R, Sibi. M. P., Webster. D., and J. Sivaguru ACS 254^th NATIONAL MEETING, WASHINGTON, DC August 20-24, 2017. (Poster presentation by Ravichadnranath Singathi on August 23, 2017).
179. Realizing Aza Paternò-Büchi reaction. Sunil Kumar Kandappa, Elango Kumarasamy, Ramya Raghunathan, Steffen Jockusch and J. Sivaguru ACS 254^th NATIONAL MEETING, WASHINGTON, DC August 20-24, 2017. (Poster presentation by Sunil Kumar Kandappa on August 22, 2017).
180. 134. Evaluating Stereospecificty of Metal Free Visible Light Mediated Acyl-Migration:, Clay, A.; Sivaguru, J., ACS 254^th NATIONAL MEETING, WASHINGTON, DC August 20-24, 2017. (Oral Talk by Anthony Clay on August 22, 2017).
181. Photoene Vs [2+2] photocycloaddition – A case study involving maleimides and alkenes. Sapna Ahuja, J. Sivaguru*. ACS 254^th National Meeting, Washington, DC. August 20- 24, 2017. (Poster presentation).
182. Controlled Photodegradation of Biomass derived polymers". Singathi. R, Raghunathan. R, Sibi. M. P., Webster. D., and J. Sivaguru, GORDON RESEARCH CONFERENCE-PHOTOCHEMISTRY, LEWISTON, ME July 23-28, 2017. (Poster presentation by Ravichandranath SInagthi on July 24, 2017).
183. Aza Paternò-Büchi reaction. Sunil Kumar Kandappa, Elango Kumarasamy, Ramya Raghunathan, Steffen Jockusch and J. Sivaguru, GORDON RESEARCH CONFERENCE-PHOTOCHEMISTRY, LEWISTON, ME July 23-28, 2017. (Poster presentation by Sunil Kumar Kandappa on July 24, 2017).
184. “Photoreactions with a twist: Employing restricted bond rotations for controlling excited state transformations J. Sivaguru *. ACS 254^th National Meeting, Washington, DC. August 20- 24, 2017. (Oral presentation by Jayaraman Sivaguru on August 20-24, 2017 ).
185. Completing the cycle: Photodegradation as a tool to make sustainable and recyclable polymers/oligomers derived from bioresources, J. Sivaguru*, ACS 254^th National Meeting, Washington, DC. August 20-24, 2017. (Oral presentation by Jayaraman Sivaguru on August 20- 24 ,2017).
186. Photodegradable and Recyclable Bio-based Composite, R, Singathi, A, Amiri, V, Burkart, Sivaguru, J, C, A. Ulven*, EUROPEAN ADVANCED MATERIALS CONGRESS (EAMC) Stockholm, Sweden August 22-24, 2017 (Oral presentation by Chad A. Ulven on August 22-24, 2017).
187. Atropselective Acyl-Migration Utilizing Visible light, Clay, A.; Sivaguru, J, GORDON RESEARCH CONFERENCE-PHOTOCHEMISTRY, LEWISTON, ME July 23-28, 2017. (Poster presentation by Anthony Clay on July 24, 2017).
188. Atropselective Acyl-Migration Utilizing Visible light, Clay, A.; Sivaguru, J, ACS DIVISION OF ORGANIC CHEMISTRY GRADUATE STUDENT RESEARCH SYMPOSIUM, Oregon. July 20-23, 2017. (Poster presentation by Anthony Clay).
189. Enantioselective Organophotocatalysis – Manipulating excited state reactivity and selectivity using non-covalent interactions. Nandini Vallavoju, Selvakumar Sermadurai, Mukund Sibi and J. Sivaguru* ACS GREAT LAKES REGIONAL MEETING, FARGO, ND June 27-30, 2017 (Oral talk by Jayaraman Sivaguru on June 28, 2017).
190. Manipulating Excited State Chemistry In Molecules and Materials. J. Sivaguru* ACS GREAT LAKES REGIONAL MEETING, FARGO, ND June 28, 2017 (Oral talk by Jayaraman Sivaguru on June 27- 30, 2017).
191. Biomass Derived Photoinitiators Clay, A, . Sibi. M. P.*, Webster. D.*, and J. Sivaguru*. ACS GREAT LAKES REGIONAL MEETING, FARGO, ND June 27-30, 2017 (Oral talk by Anthony Clay on June 27- 30, 2017).
192. Aza Paternò-Büchi reactions. Kandappa. S. K, Kumaraswamy. E, Ragunathan. R, Jockusch. S and Sivaguru. J*. ACS GREAT LAKES REGIONAL MEETING, FARGO, ND June 27-30, 2017 (Poster presentation by Sunil Kumar Kandappa on June 27 - 30, 2017).
193. Controlled Photodegradation of Biomass derived Polymers Singathi. R, Raghunathan. R, Sibi. M. P.*, Webster. D.*, and J. Sivaguru*. ACS GREAT LAKES REGIONAL MEETING, FARGO, ND June 27-30, 2017 (Oral talk by Ravichandranath Singathi on June 27- 30, 2017).
194. Photoene Vs [2+2] photocycloaddition – A case study involving maleimides and alkenes. Ahuja, S.; Raghunathan. R. and Sivaguru. J*. 2017 ACS Summer School on Green & Sustainable Chemistry, Colorado School of Mines, Golden, Colorado June 20-27, 2017 (Poster presentation by Sapna Ahuja on June 23, 2017).
195. Photoene Vs [2+2] photocycloaddition – A case study involving maleimides and alkenes. Ahuja, S.; Raghunathan. R. and Sivaguru. J*. 7th OHIO PHOTOCHEMICAL SOCIETY MEETING-2017, OREGON, OH, May 18-20, 2017 (Poster presentation by Sapna Ahuja on May 18-19, 2017)
196. Light Initiated Reactions for Manipulating Reactivity of Molecules and Materials Sivaguru. J*. 7th OHIO PHOTOCHEMICAL SOCIETY MEETING-2017, OREGON, OH, May 18-20, 2017 (Invited talk by J. Sivaguru May 18, 2017)
197. Controlled Photodegradation of Biomass derived Polymers Singathi. R, Raghunathan. R, Sibi. M. P.*, Webster. D.*, and J. Sivaguru*. 7th OHIO PHOTOCHEMICAL SOCIETY MEETING-2017, OREGON, OH, May 18-20, 2017 (Poster presentation by Ravichandranath Singathi on May 18-19, 2017.
198. Uncovering new reactivity from excited states-Transposed and Aza equivalent Paternò-Büchi reactions. Kandappa. S. K, Kumaraswamy. E, Ragunathan. R, Jockusch. S and Sivaguru. J*. 7th OHIO PHOTOCHEMICAL SOCIETY MEETING-2017, OREGON, OH, May 18-20, 2017 (Poster presentation by Sunil Kumar Kandappa on May 18-19, 2017.
199. Biomass derived Cross-linked polymers: Programmed Photo degradation. R, Raghunathan. R, Sibi. M. P.*, Webster. D.*, and J. Sivaguru*. ND EPSCoR/IDeA 2017 STATE CONFERENCE, – FARGO, ND April 12, 2017 (Poster presentation by Ravichandranath Singathi on April-19-2016)
200. Biomass derived Photoinitiators Clay, A, Singathi R, Krishnan, R.; Saravana, Raghunathan. R, Sibi. M. P.*, Webster. D.*, and J. Sivaguru*. ND EPSCoR/IDeA 2017 STATE CONFERENCE, – FARGO, ND April 12, 2017 (Poster presentation by Ravichandranath Singathi on April-19-2016)
201. Visible Light Induced Polymerization of Alkenes under Solvent Free Conditions. Ahuja, S.; Iyer, A.; J. Sivaguru*. ND EPSCoR/IDeA 2017 STATE CONFERENCE, – FARGO, ND April 12, 2017 (Poster presentation by Sapna Ahuja on April-12-2017)
202. “Uncovering new reactivity from excited states-Transposed and Aza equivalent Paternò-Büchi reactions.” Kandappa. S. K, Kumaraswamy. E, Raghunathan. R, Jockusch. S and Sivaguru. J*. 26 ^th INTER-AMERICAN PHOTOCHEMICAL SOCIETY MEETING -Sarasota, FL, January 02-05, 2017 (poster presentation by Sunil Kumar Kandappa on January 02-03, 2017)
203. “Photoreactions with a twist: Manipulating excited state reactivity and selectivity with restricted bond rotations.” Sivaguru. J*. 26 ^th INTER-AMERICAN PHOTOCHEMICAL SOCIETY MEETING -Sarasota, FL, January 02-05, 2017 (Oral talk by J. Sivaguru onJanuary 02-03, 2017)
204. “Biomass Derived Photoinitiators”, Clay, A, Singathi. R, Raghunathan. R, Krishnan. R, Rajendran. S, Sibi. M. P.*, Webster. D.*, and J. Sivaguru 26 ^th INTER-AMERICAN PHOTOCHEMICAL SOCIETY MEETING -Sarasota, FL, January 02-05, 2017 (poster presentation by Anthony Clay on January-2-3-2016)
205. “Renewable and Recyclable Vanillin Based Photodegradable Polymers”, Singathi. R, Raghunathan. R, Sibi. M. P.*, Webster. D.*, and J. Sivaguru*, 26 ^th INTER-AMERICAN PHOTOCHEMICAL SOCIETY MEETING -Sarasota, FL, January 02-05, 2017 (poster presentation by Ravichandranath Singathi on January-2-3-2016)
206. “Visible light mediated chloromethylation of N-N bond based acrylanilides”. Iyer. A, Jockusch. S and Sivaguru. J*, 26th I-APS Conference, Sarasota, FL January 2-5, 2017(poster predestination by Akila Iyer on January-2-3-2016).
207. “Vanillin based photodegradable polymers”, Singathi, R.; Raghunathan, R.; Webster, D.; Sibi, M. P.; Sivaguru, J. JTBW2016 and KNJS2016, Kagoshima, Japan (poster presentation by Ravichandranath Singathi on Nov-1-2016 and Nov-2-2016).
208. “Completing the Cycle: Photodegradation as a tool to make sustainable and recyclable Polymers/Oligomers Derived from Bioresources” Singathi, R.; Raghunathan, R.; Webster, D.; Sibi, M. P.; Sivaguru, J. JTBW2016 and KNJS2016, Kagoshima, Japan (Invited talk presented by J. Sivaguru on Nov-1-2016).
209. “Programmed degradation of polymers from derived from bio-resources: Towards sustainable, renewable and recyclable materials” Sivaguru, J. Environmental and Conservational Science seminar, NDSU, Fargo, ND (Talk presented by J. Sivaguru on Sep-6-2016).
210. “Choromethylation under metal free photocatalysis.” Iyer. A, Jockush. S and Sivaguru. J*, 252nd ACS NATIONAL MEETING -Philadelphia, PA August 21-26, 2016 (oral talk presented by Akila Iyer on August-23-2016).
211. “Visible light induced polymerization of alkenes under solvent free conditions.” Iyer. A, Jockush. S and Sivaguru. J*, 252nd ACS NATIONAL MEETING -Philadelphia, PA August 21-26, 2016 (poster presentation by Akila Iyer on August-24-2016).
212. “Biomass derived co-catalyst mediated visible light induced polymerization of alkenes.” Iyer. A and Sivaguru. J*, 252nd ACS National Meeting Philadelphia, PA August 21-26, 2016 (poster presentation by Akila Iyer on August-24-2016).
213. “Visible light mediated photocatalysis of classical photoreactions.” Iyer. A, Jockush. S and Sivaguru. J*, DOC GRADUATE STUDENT SYMPOSIUM, -Bryn Mawr, PA July 28, 2016 (poster presentation by Akila Iyer on July-28-2016).
214. Renewable, Recyclable and photodegradable biomass derived polymers, Singathi. R, Raghunathan. R, Krishnan. R, Rajendran. S, Sibi. M. P.*, Webster. D.*, and J. Sivaguru*, International Symposium on materials from renewables, North Dakota State University, Fargo, North Dakota July 19 - 20^th, 2016 (poster presentation by Ravichandranath Singathi)
215. “Renewable, Recyclable and photodegradable biomass derived polymers” Singathi. R, Raghunathan. R, Krishnan. R, Rajendran. S, Sibi. M. P.*, Webster. D.*, and J. Sivaguru*, 36th Reaction Mechanisms Conference - RMC 2016, Saint Louis University , St. Louis, MO, June 26 - 29^th, 2016 (poster presentation by Ravichandranath Singathi)
216. “Photochiral Auxiliaries based Hydrazides: Visible Light Mediated 6π-Photocyclization. Iyer. A, Jockush. S and Sivaguru. J*, 36th REACTION MECHANISMS CONFERENCE -RMC, - St. Louis, MO June 26-30, 2016 (poster presentation by Akila Iyer on June-27-2016).
217. Kandappa. S. K, Kumaraswamy. E, Raghunathan. R, Jockusch. S.and Sivaguru. J* “Transposed Paternò-Büchi Reaction." ACS SUMMER SCHOOL IN GREEN CHEMISTRY AND SUSTAINABLE MATERIALS, - Colorado School of Mines, Golden, CO June 23-28, 2016 (poster presentation by Sunil Kumar Kandappa on June-24-2016)
218. “Visible light mediated photocatalysis of classical photoreactions.” Iyer. A, Jockush. S and Sivaguru. J*, 20th ACS GC&E CONFERENCE 2016, - Portland, OR June 13-16, 2016 (oral talk presented by Akila Iyer on June-16-2016).
219. “Alternative strategy to color technique”. Iyer. A, Colm. M, Celik, I. 20th ACS GC&E CONFERENCE 2016, - Portland, OR June 13-16, 2016 (oral talk presented by Akila Iyer on June-13-2016 as part of the Green chemistry workshop).
220. Controlling Light Induced Transformations from the Excited States,26th Midwest Organic Solid State Symposium (MOSSCS XXVI)- Invited Plenary speaker (June 3 and 4, 2016).
221. “Controlling Intramolecular [2+2] Photocycloaddition of Enones By Axial Chirality” Clay, A.; Sivaguru, J.; Inter-American Photochemical Society, Santiago Chile. May 24-27, 2016. (poster presented by Anthony clay May-25-2016).
222. “Controlling Intramolecular [2+2] Photocycloaddition of Enones by Axial Chirality.” Clay. A, and J. Sivaguru*, 2016 NSF/IAPS Workshop on Photocatalysis, Photoconversion and Photoelectrochemistry: Fundamentals, Techniques and Applications for the 21st Century. – Santiago, Chile  May 21-23, 2016(poster presentation) by Anthony Clay on May-22-2016“Controlling
223. “Photodegradable polymers and photoinitiators derived from biomass.” Singathi. R, Raghunathan. R, Krishnan. R, Sibi. M. P.*, Webster. D.*, and J. Sivaguru*, ND EPSCoR/IDeA 2016 STATE CONFERENCE, – Grand Forks, ND April 19, 2016 (poster presentation by Ravichandranath Singathi on April-19-2016)
224. “Phenacyl based models systems for photodegradable polymers.” Raghunathan. R, Rajendran. S, Krishnan. R, Singathi. R, Sibi. M. P. *, Webster. D.*, and J. Sivaguru* ND EPsCOR/IDeA 2016 state conference,  Grand Forks April 19th 2016. (Poster presentation by Ramya Raghunathan on Apr-19-2016).
225. "Polymerization Utilizing Vanillin Derived Benzophenone Photoinitiators.” Bergseth, Z., Clay, A., Krishnan, R., Sibi, M.P.*,  Webster, D.*, and J. Sivaguru* ND EPSCoR State Conference, Grand Forks April 19, 2016. (poster presented by Bergseth, Z., (he is an undergraduate student) April 19, 2016).
226. "Biobased Photoacids: A Study of Substitution and Reactivity of Vanilin Derivatives”. Clay, A., Bergseth, Z., Krishnan, R., and J. Sivaguru* ND EPSCoR State Conference, Grand Forks April 19, 2016. (poster presented by Anthony Clay April 19, 2016).
227. “Visible light induced polymerization of alkenes under solvent free conditions.” Iyer. A, Jockush. S and Sivaguru. J*, ND EPSCoR/IDEA 2016 STATE CONFERENCE, -Grand Forks, ND April 19, 2016 (poster presentation by Akila Iyer on April-19-2016).
228. "Enantiospecific [2+2] photoreactions of acrylimides.” Iyer. A, Steffen Jockusch* and J. Sivaguru*  Recent Advances in Drug Development, Fargo September 1 2016. (poster presented by Akila Iyer on September-1-2016)
229. "Sustainable, Renewable and Recyclable: Programmed Photodegradation of Polymers/Oligomers Derived from Bioresources” 
Raghunathan, R.; Rajendran, S.; Krishnan, R.; Sibi, M. P.;* Webster, D.;* and Sivaguru, J,*  Pacifichem 2015. December 15-20, 2015. (poster presentation by J. Sivaguru on Dec-17-2015).
230. “Programmed degradation of polymer/oligomer derived from sustainable resources: A mechanistic perspective.” Raghunathan. R, Rajendran. S, Krishnan. R, Sibi. M. P.*, Webster. D.*, and J. Sivaguru* 250th American Chemical Society National Meeting & Exposition, Boston Aug 16-20 2015. (poster presentation by Ramya Raghunathan on Aug-18-2015).
231. “Atropselective [2+2] photocycloaddition of maleimides with UV/Visible light: Role of axial chirality, chain length and substituents.” Raghunathan. R, Kumarasamy. E, Steffen Jockusch,  Ugrinov. A,  and J. Sivaguru* ACS-DOC Graduate Research Symposium, Austin Jul 23-26 2015. (poster presentation by Ramya Raghunathan).
232. "Enantiospecific [2+2] photoreactions of acrylimides.” Iyer. A, Steffen Jockusch* and J. Sivaguru* Photochemistry Gordon Research Conference, Stonhill college, Easton, MA, USA.Jul 19-24 2015. (poster presented by Akila Iyer)
233. “A Sustainable approach: Employing light for the degradation of polymer/oligomer derived form renewable resources.” Raghunathan. R, Krishnan. R, Rajendran. S, Sibi. M. P.*, Webster. D.*, and J. Sivaguru* Gordon Research conference, Stonhill college, Easton, MA, USA.Jul 19-24 2015. (poster presentation by Ramya Raghunathan).
234. "Enantiospecific [2+2] photoreactions of acrylimides.” Iyer. A, Steffen Jockusch* and J. Sivaguru* Photochemistry Gordon Research Seminar, Stonhill college, Easton, MA, USA. Jul 18-19 2015. (poster presented by Akila Iyer)
235. “A Sustainable approach: Employing light for the degradation of polymer/oligomer derived form renewable resources.” Raghunathan. R, Krishnan. R, Rajendran. S, Sibi. M. P.*, Webster. D.*, and J. Sivaguru* Gordon Research Seminar, Stonhill college, Easton, MA, USA.Jul 18-19 2015. (oral presentation by Ramya Raghunathan).
236. Enantioselective Organo-Photocatalysis: Atropisomeric Thioureas as Catalysts for Controlling Excited State Reactivity and Selectivity" Photochemistry Gordon Research Conference, Stonhill college, Easton, MA, USA.Jul 19-24 2015. (Invited talk by J. Sivaguru)
237. “Sustainable, renewable and recyclable: Programmed photodegradation of polymers/oligomers derived from bioresources” Ramya Raghunathan, Saravanakumar Rajendran, Retheesh Krishnan, Mukund Sibi, Dean Webster, J. Sivaguru. ACS Green Chemistry Conference, Bethesda, MD July 14-16, 2015. . (oral presentation by J. Sivaguru).
238. “Synthesis, Shine light and recycle: Photodegradation of polymer/oligomer derived from sustainable resources; A mechanistic perspective.” Raghunathan. R, Rajendran. S, Krishnan. R, Sibi. M. P.*, Webster. D.*, and J. Sivaguru* ND EPSCoR INSPIRE - ND 2015 State Conference, Fargo Apr 22 2015. (poster presented by Ramya Raghunathan).
239. “Light As a Benign Reagent: Photochemical Transformations of α-Substituted Acrylanilide Derivatives in the Presence of Alkali Metals”. Anthony Clay, Anoklase Jean-Luc Ayitou, Elango Kumarasamy, Steffen Jockusch and J. Sivaguru*. NDSU, Arts and Science Forum, Memoriol Union, North Dakota State University, Febuary 4 2015. (poster presented by Anthony Clay)
240. "Synthesis, Shine light and recycle: Photodegradation of polymer/oligomer derived from renewable bioresources." Raghunathan, R.; Rajendran, S.; Krishnan, R.; Sibi, M. P.;* Webster, D.;* and Sivaguru, J,*  NDSU Research & Arts Forum, Fargo, February 4, 2015. (poster presented by Ramya Raghunathan).
241. "Enantiospecific [2+2] photoreactions of acrylimides.” Iyer. A, Steffen Jockusch* and J. Sivaguru* Inter-American Photochemical Society, Sarasota Jan 1-5 2015. (poster presented by Akila Iyer).
242. “Tale of Twisted Molecules: Stereospecific Phototransformations of Atropisomeric Maleimides.” Elango Kumarasamyand J. Sivaguru* Inter-American Photochemical Society (IAP-S) conference, Sarasota, FL, Jan 1-5, 2015. (Oral Presentation for receiving the Closs Award).
243. “Novel chiral thiourea as efficient organo-photocatalysts to mediate [2+2] photocycloaddition of coumarin derivatives." Vallavoju, N, Selvakumar Sermadurai, Mukund Sibi* and J. Sivaguru* - IAPS, Sarasota, FL, Jan 1-4 2015. (poster presented by Nandini Vallavoju; Selected as the best poster).
244. "Synthesis, Shine light and recycle: Photodegradation of polymer/oligomer derived from renewable bioresources." Raghunathan, R.; Rajendran, S.; Krishnan, R.; Sibi, M. P.;* Webster, D.;* and Sivaguru, J,* Inter American Photochemical Society (IAPS) conference. Sarasota, Florida, January 1-4, 2015. (poster presented by Ramya Raghunathan).
245. “Light Mediated Organic Reactions: Asymmetric Synthesis and Polymer Degradation” Nandini Vallovoju,^a Selvakumar Sermadurai,^a Ramya Raghunathan,^a Saravana Rajendran,^a Jayaraman Sivaguru*^,a Dean Webster*^,b and Mukund Sibi*^aEuropean Cooperation in Science and Technology (COST) meeting in Tenerife Spain. September 2014 (Presentation by Mukund Sibi)
246. “Light As a Benign Reagent: Photochemical Transformations of α-Substituted Acrylanilide Derivatives in the Presence of Alkali Metals”. Anthony Clay, Anoklase Jean-Luc Ayitou, Elango Kumarasamy, Steffen Jockusch and J. Sivaguru*. NOBCChE Annual Meeting. New Orleans, Marriot, September 22 – 25 2014. (poster presented by Anthony Clay)
247. "Enantioselective intramolecular [2+2] photocycloaddition of coumarin derivatives mediated by thiourea organo-photocatalysis." Vallavoju, N, Selvakumar Sermadurai, Mukund Sibi* and J. Sivaguru* ACS Division of Organic Chemistry - Graduate Research Symposium, University of California, Irvine, July 24-27 2014. (poster presented by Nandini Vallavoju).
248. “Light As a Benign Reagent: Photochemical Transformations of α-Substituted Acrylanilide Derivatives in the Presence of Alkali Metals”. Anthony Clay, Anoklase Jean-Luc Ayitou, Elango Kumarasamy, Steffen Jockusch and J. Sivaguru*. ACS Green Chemistry Summer School. Colorado School of Mines, Golden, Co, July 15 – 22 2014. (poster presented by Anthony Clay)
249. “Enantiospecific [2+2] photreactions of acrylimides" Akila Iyer J. Sivaguru* ACS green chemistry summer school, Colorado school of mines, Golden, CO, USA. July 15-22, 2014. (Poster to be presented by Akila Iyer).
250. "Degradation of bio-mass based oligomer/polymer."  Raghunathan, R.; Rajendran, S.; Sibi, M. P.;* Webster, D.;* and J. Sivaguru.* American Society for Photobiology. 37^th conference, San Diego, CA June 14-19, 2014. (poster presented by Ramya Raghunathan).
251. "Degradation of bio-mass based oligomer/polymer."  Raghunathan, R.; Rajendran, S.; Sibi, M. P.;* Webster, D.;* and J. Sivaguru.*   Frontiers in Biomedical Research symposium, Centre for Protease Research, NDSU, Fargo, ND, May 29-30, 2014. (poster presented by Ramya Raghunathan)
252. “Enantiospecific [2+2] photreactions of acrylimides" Akila Iyer and J. Sivaguru* Research and Arts Forum, North Dakota State University, Fargo, ND, USA. May 2014. (Poster presented by Akila Iyer).
253. “Light induced stereospecific [2+2]-photocycloaddition of atropisomeric maleimides under visible light photocatalysis.” Elango Kumarasamy, Ramya Raghunathan, Steffen Jockusch, Angel Ugrinov & J. Sivaguru.* Frontiers in Biomedical Research, Fargo, ND USA. May 30-31, 2014. (poster presented by Elango Kumarasamy)
254. "Degradation of bio-mass based oligomer/polymer."  Raghunathan, R.; Rajendran, S.; Sibi, M. P.;* Webster, D.;* and J. Sivaguru.* ND EPSCoR / IDeA 2014 State conference. Grand forks, North Dakota, April 29, 2014. (poster presented by Ramya Raghunathan).
255. “Light induced stereospecific [2+2]-photocycloaddition of atropisomeric maleimides under visible light photocatalysis.” Elango Kumarasamy, Ramya Raghunathan, Steffen Jockusch, Angel Ugrinov & J. Sivaguru.* ND-EPSCOR 2014 state conference, Grand Forks, ND USA. April 29, 2014. (poster presented by Elango Kumarasamy).
256. "Enantiospecific [2+2] photoreactions of acrylimides.” Iyer. A. and J. Sivaguru*Research and Arts Forum, North Dakota State University, Fargo, April 24 2014. (poster presented by Akila Iyer).
257. “Controlling selectivity during light initiated reactions in solution” Committee on Science
 -: Young Investigators (ID: 21438), ACS Fall 2013 meeting, Indianapolis, IN. September 8-12 (presentation on Sep 9^th), 2013. (Invited talk presented by J. Sivaguru).
258. "Light induced stereospecific reactions of atropisomeric 2-pyridones." Elango Kumarasamy and J. Sivaguru*. ACS-Division of Organic Chemistry - Graduate Research Conference, University of Delaware, Newark July 25-28, 2013. (Talk presented delivered by Elango Kumarasamy).
259. "Light Induced Stereospecific [2+2]-Cycloaddition of Atropisomeric 3,4-Dihydro-2-pyridones." Elango Kumarasamy and J. Sivaguru*. Gordon Research Seminar, Stonhill college, Easton, MA, USA.July 13-14, 2013. (Talk delivered by Elango Kumarasamy).

54."Light induced stereospecific intramolecular hydrogen abstraction of atropisomeric enone carboxamides." Nandini Vallavoju and J. Sivaguru*. Gordon Research Conference (GRC), Stonehill College, Easton, Massachusetts, USA. July 14-19, 2013. (Poster presented by Nandini Vallavoju).

53. "Light Induced Stereospecific [2+2]-Cycloaddition of Atropisomeric 3,4-Dihydro-2-pyridones." Elango Kumarasamy and J. Sivaguru*. Gordon Research Conference, Easton, MA, USA.July 14-19, 2013. (Poster presented by Elango Kumarasamy).
54. “Light Induced enantiospecific photocycloaddition of maleimides" Ramya Raghunathan, Elango Kumarasamy and J. Sivaguru* ACS green chemistry summer school, Colorado school of mines, Golden, CO, USA. July 2013. (Poster presented by Ramya Raghunathan).
55. Light induced stereospecific [2+2]-photocycloaddition of atropchiral 3,4-Dihydropyridones," Elango Kumarasamyand J. Sivaguru*,   2013 Symposium on Excellence in Nurturing Undergraduate Research, Fargo, ND, USA, April 27,  2013.
56. "Photochemical Transformations under Elevated Pressure," Anoklase J.-L. Ayitouand J. Sivaguru* 2013 Symposium on Excellence in Nurturing Undergraduate Research, Fargo, ND, USA, April 27 2013.
57. “Atropisomeric Molecular Templates for Asymmetric Photoreactions” J. Sivaguru; 22nd Inter-American Photochemical Society winter conference, Sarasota, Fl, USA.January 2,5, 2013.(2011 Young investigator award talk presented by J. Sivaguru).
58. "Light induced stereospecific intramolecular hydrogen abstraction of axially chiral enones." Nandini Vallavojuand J. Sivaguru*. Inter American Photochemical society (I-APS), Sarasota, FL, USA.January 2-5, 2013. (Poster presented by Nandini Vallavoju).
59. “Light induced enantiospecific photocycloaddition of maleimides” Ramya Raghunathan,Elango Kumarasamy and J. Sivaguru* 22^nd Inter American Photochemical society (I-APS), Sarasota, FL, USA. January 2-5, 2013. (Poster presented by Ramya Raghunathan).
60. "Light induced stereospecific [2+2]-photocycloaddition of atropisomeric 3,4-dihydro-2-pyridones" Elango Kumarasamy and J. Sivaguru* 22^nd Inter American Photochemical Society (IAPS), Sarasota, FL, USA. January 2-5, 2013. (Poster presented by Elango Kumarasamy)
61. “Enantiospecific photochemical transformations under elevated pressure” Anoklase J.-L. Ayitou, Gaku Fukuhara, Elango Kumarasamy, Yoshihisa Inoue and J. Sivaguru*; 22^nd Inter-American Photochemical Society winter conference, Sarasota, Fl, USA.January 2-5, 2013.(Poster presented by Anoklase J.-L. Ayitou).
62. “Enantiospecific chiral transfer: Light induced 6p-electrocyclization of axially chiral acrylanilides” Anoklase J.-L. Ayitou and J. Sivaguru* DOW BEST Symposium, Midland, MI, USA. October 2-3, 2012. (Talk presented by Anoklase J.-L. Ayitou).
63. “Solvent-free enantiospecific 6p-photocyclization of axially chiral a-substituted acrylanilides” Anoklase J.-L. Ayitou and J. Sivaguru* Symposium on Sustainable Materials and Light Driven Processes, Fargo, ND, USA.September 28-29, 2012. (Poster presented by Anoklase J.-L. Ayitou).
64. "Light induced stereospecific intramolecular hydrogen abstraction of axially chiral enones." Nandini Vallavojuand J. Sivaguru*. Symposium on Sustainable Materials and Light driven processes, NDSU, Fargo, ND, USA. September 28-29, 2012. (Poster presented by Nandini Vallavoju).
65. "Light Induced Enantiospecific [2+2]-photocycloaddition of atropchiral 3,4-Dihydro-2-pyridone" Elango Kumarasamyand J. Sivaguru*. Symposium on Sustainable Materials and Light Driven Processes, Fargo, ND, USA. September 28-29, 2012. (Poster presented by Elango Kumarasamy).
66. "Light Induced Enantiospecific [2+2]-photocycloaddition of atropchiral 3,4-Dihydro-2-pyridone" Elango Kumarasamyand J. Sivaguru*. ND EPSCoR 2012 state conference, Grand Forks, ND, USA. September 18, 2012. (Poster presented by Elango Kumarasamy).
67. “Solvent-free enantiospecific 6p-photocyclization of axially chiral aplha-substituted acrylanilides” Anoklase J.-L. Ayitou and J. Sivaguru;  Green Chemistry GRS and GRC; Barga, Italy. July 2012. (Poster presented by Anoklase J.-L. Ayitou).
68. "Light induced stereospecific intramolecular hydrogen abstraction of axially chiral enones." Nandini Vallavojuand J. Sivaguru*. ACS Summer School on Green Chemistry and Sustainable Energy, Colorado School of Mines, Boulder, CO, USA. June-July 2012. (Poster presented by Nandini Vallavoju).
69. "Light induced enantiospecific [4p]-ring closure of molecularly chiral-2-pyridones" Elango Kumarasamyand J. Sivaguru*" ACS Summer school of green chemistry and sustainable energy, Golden, CO, USA. June-July, 2012. (Poster presented by Elango Kumarasamy).
70. “Learning from Nature: Bio-mimetic supramolecular photocatalysis” ” J. Sivaguru*, 93rd Annual Meeting of the Pacific Division of AAAS and Northwest Region of Sigma Xi, the Scientific Research Society, Boise, Idaho. June 2012. (Talk presented by J. Sivaguru as part of the 2012 Sigma-Xi Young Investigator Award Lecture).
71. "Light induced enantiospecific [4p]-ring closure of molecularly chiral-2-pyridones" Elango Kumarasamyand J. Sivaguru*" ND-SD 2011 Joint EPSCoR Conference, NDSU, Fargo, ND, USA. October 2011.(Poster presented by Elango Kumarasamy).

34 "Light induced stereospecific intramolecular hydrogen abstraction of axially chiral enones." Nandini Vallavoju and J. Sivaguru*. ND-SD 2011 Joint EPSCoR Conference, NDSU, Fargo, ND, USA. October 2011. (Poster presented by Nandini Vallavoju).

33. “Light Induced Asymmetric Reactions In Solution” J. Sivaguru*, 242^nd ACS Fall National Meeting, Denver, CO, USA. August 2011. ORGN-350. (Talk presented by J. Sivaguru as part of the Young Investigator Symposium).
34. "Light induced stereospecific intramolecular hydrogen abstraction of axially chiral enones" Nandini Vallavoju and J. Sivaguru*. 242^nd ACS Fall National Meeting, Denver, CO, USA. August 2011. ORGN-411. (Poster presented by Nandini Vallavoju).
35. Light induced enantiospecific [4p]-ring closure of molecularly chiral-2-pyridones. Elango Kumarasamy and J. Sivaguru* 242^nd ACS Fall National Meeting, Denver, CO, USA. August 2011. ORGN-436 (Poster presented by Elango Kumarasamy).
36. “Heavy Atom(s) Induced Enantiospecific 6π-Photocyclization of Molecularly Chiral Acrylanilides” Anoklase J.-L. Ayitou and J. Sivaguru.* 242^nd ACS National Fall Meeting. Denver, CO, USA. August 2011. ORGN-575. (Talk presented by Anoklase J.-L. Ayitou).
37. Supramolecular Photocatalysis: Mechanism Studies of Cucurbit[8]uril Facilitating the [2+2] Photodimerization of 6-methylcoumarin, Abstracts of Papers, 242nd ACS National Meeting, Denver, August 2011. ORGN-574 (Talk presented by Barry Pemberton)
38. “From Cavity to Catalyst: Supramolecular photocatalysis within Cucurbiturils” J. Sivaguru* Gordon Conference in Photochemistry, Boston, MA. USA. July 2011. (Talk presented by J. Sivaguru).
39. “Turning Nanocavities Into Photocatalysts” Quebec” Barry C. Pemberton and J. Sivaguru.* ACS Green Chemistry Summer School, Montreal, Canada,. July 2011. (Poster presented by Barry Pemberton).
40. “Heavy Atom(s) Induced Enantiospecific Chiral Transfer: 6p-Photocyclization of Axially Chiral a-Substituted Acrylanilides” Anoklase J.-L. Ayitou and J. Sivaguru.* Green Chemistry Summer School, Montreal, Canada,. July 2011. (Poster presented by Anoklase J.-L. Ayitou).
41. “Enantiospecific Chiral Transfer: Role of Reaction Media, Reactive Spin States and Heavy Atom(s) in the 6π-Photocyclization of Axially Chiral Acrylanilides” Anoklase J.-L. Ayitou and J. Sivaguru.* Gordon Conference in Photochemistry, Boston, MA. USA.July 2011. (Poster presented by Anoklase J.-L. Ayitou).
42. “Insights into Photocatalysis: Turning Nanocavities Into Photocatalysts” Barry C. Pemberton and J. Sivaguru.* Gordon Conference in Photochemistry, Boston, MA. USA. July 2011. (Poster presented by Barry Pemberton).
43. “From cavity to catalyst: supramolecular photocatalysis within cucurbiturils” International Conference on Cucurbiturils (ICCB), University of Cambridge, UK. July 2011. (Talk presented by J. Sivaguru).
44. “Light Induced Enantiospecific 6p-Photocyclization of Axially Chiral Acrylanilides in the Solid State” Anoklase J.-L. Ayitou and J. Sivaguru.* NOBBCChe GlaxoSmithKline Fellowship Graduate Fellowship award reception. National Organization for the Professional Advancement for Black Chemists and Chemical Engineers, Houston, TX, United States . Houston, Texas, USA.April 2011. (Talk presented by Anoklase J.-L. Ayitou)
45. “Supramolecular Photocatalysis by Nano-encapsulation” Barry C. Pemberton and J. Sivaguru,* ND-EPSCoR 2010 State Conference, Grand Forks, ND, USA September 29th, 2010. (Poster presented by Barry Pemberton).
46. “Selective Light Induced Reactions in Solution and in Water Soluble Nano-containers” 2010 Grammaticakis- Neumann Prize PLENARY Lecture, Swiss Chemical Society Fall Meeting, Zurich, Switzerland, September 2010. (Talk presented by J. Sivaguru).
47. Photophysics & Photochemistry of Molecularly Chiral α-Substituted Acrylanilides. A. J.-L. Ayitou and J. Sivaguru,* Osaka University, Osaka, Japan, July 2010.
48. “Enantiospecific Photochemical Transformations and Photophysics of Molecularly Chiral Acrylanilides” Anoklase J.-L. Ayitou and J. Sivaguru.* UNCF-Merck Science Initiative for Graduate Students. Philadelphia, PA, USA. June 2010. (Poster presented by Anoklase J.-L. Ayitou).
49. “Enantiospecific Photochemical Transformations in Solution” J. Sivaguru*, Anoklase Jean-Luc Ayitou and Josepha L. Jesuraj; Gordon Research Conference in Organic Photochemistry, Smithfield, Rhode Island; July 2009. (Talk presented by J. Sivaguru)
50. “Molecular Chiral Transfer: 6π-photocyclizaton of acrylanilides” Anoklase Ayitou and J. Sivaguru. Inter-American Photochemical society, Tampa Bay, FL, USA. January 2009. (presented by Anoklase Ayitou)
51. “Photodimerization and Dynamics of Coumarin Derivatives in Water Soluble Cucurbit[8]uril Nanocavities” Barry Pemberton, Nilotpal Barooah, Alexander C. Johnson and J. Sivaguru. Inter-American Photochemical society, Tampa Bay, FL, USA. January 2009. (presented by Barry Pemberton)
52. Controlling Photochemistry in Solution and in Water Soluble Nano-Containers Anoklase Ayitou, Nilotpal Barooah, Barry C. Pemberton and J. Sivaguru. ACS-Mid West Regional conference on Photochemistry and Photophysics Applications in Biology and Energy Conversion (Abstract ID#: 60960 ), Kearney, NE. October 2008 (invited talk presented by J. Sivaguru).
53. Controlling Photoreactivity of Coumarins in Water Soluble Nano-Cavities Nilotpal Barooah and J. Sivaguru ACS-Mid-Atlantic Regional Conference on Photochemistry (ID: 53281) New York, NY. May 2008 (invited talk presented by J. Sivaguru).
54. “Imprinting Molecular Chirality in Light Induced Transformations” Wobbema, A.; Ayitou, A. and J. Sivaguru; Governor school student presentation, North Dakota State University, Fargo, North Dakota; August 2007.
55. “Imprinting Molecular Chirality in Light Induced Transformations” Ayitou, A. and J. Sivaguru; Gordon Research Conference in Organic Photochemistry, Smithfield, Rhode Island; July 2007.

Presented with Affiliation to Columbia University, New York, NY or Tulane University, New Orleans, LA. (Based on post-doctoral and doctoral work)

10. “Host-Guest Chemistry and Entropy to control stereoselection in photoreactions” J. Sivaguru, Hideaki Saito, Solomon, Marissa, Thomas Poon, Yoshihisa Inoue, Waldemar Adam and Nicholas J. Turro; Gordon Research Conference in Organic Photochemistry, Smithfield, Rhode Island; July 2005.
11. “Scanning tunneling microscopy: A tool to identify the chirality of absorbed molecules on graphite” Vivian Nora Chin, Kavita Kannappan, Sivaguru Jayaraman, Nicholas J. Turro, and George Flynn.; American Chemical Society; San Diego, California; COLL-353; March 2005.
12. “Mechanistic insights into the diastereoselective photooxidation of enecarbamates” Roberto Franz, Thomas Poon, J Sivaguru, Steffen Jockusch, Nicholas J. Turro, and Waldemar Adam.; American Chemical Society; San Diego, California; ORGN 464;March 2005.
13. “Mechanistic insight on the stereoselective photooxidation of enecarbamates using PTAD, a singlet oxygen analog” Catherine Hooper, Thomas Poon, Roberto Franz, J Sivaguru, Steffen Jockusch, Nicholas J. Turro, and Waldemar Adam.; American Chemical Society; San Diego, California; CHED 439; March 2005.
14. “Stereoselective Photoisomerization of Diphenylcyclopropane Derivatives. A Study In Isotropic And Organized media.” J. Sivaguru and V. Ramamurthy.; Gordon Research Conference in Organic Photochemistry, Massachusetts; July 2003.
15. “Asymmetric Photoreaction in Isotropic and organized media. Photochemistry of Diphenylcyclopropane Derivatives.” Sivaguru Jayaraman and V. Ramamurthy; American Chemical Society, New Orleans, Louisiana; ORGN-488; March 2003.
16. “Asymmetric photoreaction of 2,3-diphenylcyclopropane-1-benzoylcyclopropane derivatives inside zeolites.” J. Sivaguru, Teseuya Shichi, Yoshimi Yoshiharu, J. R. Scheffer, V. Ramamurthy; Photochirogenisis 2001, Japan; September 2001.
17. “Control of Photochemical Reactions Via Confinement And Cation-Organic Interactions: Photoisomerization of 1,2-diphenylcyclopropanes.” P. Lakshminarasimhan, J. Sivaguru, Lakshmi S. Kaanumalle, V. Ramamurthy.; Inter-American Photochemical society, Argentina; May 2001.
18. “Asymmetric photoreaction of 2,3-diphenylcyclopropane-1-carboxylic acid derivatives inside zeolites” J. Sivaguru, V. Ramamurthy; Symposium on Recent Trends in Photochemical Sciences, Trivandrum, India; January 2001.
19. “Asymmetric photoreactions inside zeolites" J. Shailaja, J. Sivaguru, V. Ramamurthy; Inter-American Photochemical society-Winter conference, Clearwater beach, Florida; January 2000.