Invited Lecture

The 13th Taiwan-Japan Bilateral Symposium on Architecture of Functional Organic Molecules, New Taipei City, October 25-29, 2023

Solvation Chemistry and Reactive Molecules, Bad Honnef, 2023 17-23 September, Germany

10th Pacific Symposium on Radical Chemistry (PSRC-1), Uji, Kyoto, 2023 June 4-9

2-(4-Nitrophenyl)-1H-indolyl-3-methyl chromophore: A versatile photocage that responds to visible-light one-photon and near-infrared-light two- photon excitations, The second International Conference of Excited State Aromaticity and Antiaromaticity (ICESAA), Kauai, Hawaii, 2022, December 16-20, USA

Long-lived pai-Single bondiong Species. Taiwan-Japan Birateral Confernce in Molecular Artitechture, Kyoto, 2019 30 August -1 September, Japan

Long-lived Singlet Diradicals with pai-Single bondiong Character. Radical in Rockies, Telluride, 2019 7-12 July, USA

Photochemical Release of 2,2,6,6-Tetramethylpiperidine-1-oxyl (TEMPO) Radical from Caged Nitroxides by Near Infrared Two-photon Irradiation and Its Cytocidal effect on Lung Cancer Cells. ICoPP2019, Inchon, 2019 22-25 May, Korea

Design and synthesis of NIR two-photon responsive chromophores. 14th Korea-Japan Symposium on Frontier Photoscience: Photochemistry, Solar Cells, and Photocatalysts 26 Oct 2018

Is π SIngle Bonding Possible? 24th IUPAC International Conference on Physical Organic Chemistry 6 Jun 2018

International Symposium on Caged Compounds, March 9-10, 2018, Hiroshima International Conference Center, Hiroshima, Japan

Unusually Long-wavelength Emissions of Bicyclo[2.1.0]pentanes: New Insight unto C-C Bond Homolysis, Invited Lecture at Molecular Biradicals: Structure, Properties, and Reactivity, February 27-March 2nd, 2018, University of Würzburg, Würzburg, Germany.

Design and Synthesis of New Chromophores for Two-Photon Uncaging Reaction using Near IR Light, Keynote Lecture, International Conference on Chemical Science and Technology, February 24-25, 2018, Khulna, Bangladesh.

Is π SIngle Bonding Possible?, Invited Lecture at Uppsala University, Sweden, December 14th 2017,

Design and Synthesis of New Chromophores for Two-Photon Uncaging Reaction using Near IR Light, Plenary Lecture, Korea-Japan Frontier PhotoSceince (KJFP-2017), October 26-29, 2017, Inchon, Korea.

Is π SIngle Bonding Possible?, October 14-16, 2017, Invited Lecture in Japan-Taiwan Bilateral Conference on Molecular Architecture, Miyazaki, Japan.

Is π SIngle Bonding Possible?, September 11th 2017, Invited Lecture in Edinburg University, Edinburg, Scotland, UK.

Nitrogen Atom Effect on Reactivity of 1,3-Diradicals, September 5th 2017, Invited Lecture in ESOR 2017, Durham, England, UK.

Is π SIngle Bonding Possible?, August 3rd 2017, Invited Lecture in Herbert Mayr's 70th Birthday, Munich, Germany.

The Chemistry of Singlet 1,3-Diradical Species, July 20th 2017, Invited Lecture on PSRC 2017, Brisbane, Australia.

Stereochemistry in Photochemical Denitrogenation of Azoalkanes, Invited lecture, June 20th 2017, ISRIUM 2017, Sorento, Italy.

π-Single Bonded Species, Invited Lecture, Zimmer International Scholar Program, March 27th 2017, University of Cincinnati, Cincinnati, Ohio, USA

π-Single Bonded Species, Invited Lecture, π START Symposium, December 16th, Kwansei Univerisity, Sanda, Japan.

Design and Synthesis of New Chromophores for Two-Photon Uncaging Reaction using Near IR Light, Invited Lecture, WPI IIIS, Tsukuba, Japan, November 28th, 2016.

Design and Synthesis of New Chromophores for Two-Photon Uncaging Reaction using Near IR Light, Keynote Lecture, IBSC 2016, Jember, Indonesia, September 26th, 2016.

Design and Synthesis of New Chromophores for Two-Photon Uncaging Reaction using Near IR Light, Invited Lecture at Rutger University, USA, September 12th, 2016.

Design and Synthesis of New Chromophores for Two-Photon Uncaging Reaction using Near IR Light, Invited Lecture at University of Puerto Rico, USA, September 17th, 2016.

Chameleonic Character of 1,2-Diazacyclopentane-3,5-diyl Diradical, Invited Lecture, TSRC Radicals in the Rockies, Telluride, USA, August 1-5, 2016

Is pai-Single-bonding Possible?, Keynote Lecture, The 23rd IUPAC Conference on Physical Organic Chemistry (ICPOC-23), Sydney, Australia, July 3rd-8th, 2016

Molecular Design for Long-lived Localized Diradicals (Biradicals), Invited Lecture, The 70th Fujihara Seminar on New Development of Physical Organic Chemistry, Fukuoka, Japan, April 17-21, 2016

Nitrogen Atom Effects on the Reactivity of A Singlet Diradical, Invited Lecture, International Symposium on Construction and Application of Functional Molecules/Systems, Yilan, Taiwan, October 18-21, 2015

Design and Synthesis of New Chromophores for Two-Photon Uncaging Reaction using Near IR Light, Invited Lecture at University of Reims, France, September 10th, 2015.

Design and Synthesis of New Chromophores for Two-Photon Uncaging Reaction using Near IR Light, Invited Lecture at ICIQ, Tarragona, Catalonia, Spain, September 8th, 2015.

Design and Synthesis of New Chromophores for Two-Photon Uncaging Reaction using Near IR Light, Invited Lecture at University of Murcia, Spain, September 7th, 2015.

Nitrogen Atom Effect on Reactivity of Singlet Diradicals, European Symposium on Organic Reactivity (ESOR) 2015, Kiel, Germany, September 2nd, 2015.

Substituent Effect on the Long-wavelength Emission from Cyclopropane Derivatives, Gordon Research Conference on Photochemistry, Stonehill College, Easton, MA, USA, July 22, 2015.

Design and Synthesis of a New Chromophore with Two-photon Absorption (TPA) Property, 2-(4-Nitrophenyl)benzofuran (NPBF), and Its Application to Two-photon (TP) Uncaging reaction using Near IR Light, 2015 Korean-Japan Bilateral Symposium on Frontier Photoscience (2015 KJFP), Jeju, Korea, June 27th, 2015.

The Chemistry of π-Single Bonded Species

Invited lecture at National Chung Cheng University, Taiwan

March 3rd, 2015

Design, Synthesis, and Photochemical Reactivity of "Caged Compounds" with Two Photon Absorption(TPA) Character

Invited lecture at National Chao Tung University, Taiwan

March 2nd, 2015

The Chemistry of π-Single Bonded Species

Invited lecture at Academia Sinica, Taiwan

December 12, 2014

Caged Glutamate with π-Extended 1,2-Dihydronaphthalene Chromophore: Design, Synthesis, Two-Photon Absorption (TPA) Property, and Photochemical Reactivity

The 8th Taiwan-Japan Bilateral Symposium on Architecture of Functional Organic Molecules

Fukuoka, Japan, November 27-29, 2014

The Chemistry of π-Single Bonded Species

Invited lecture at University of Wisconsin-Madison, USA

August 20, 2014

The Chemistry of π-Single Bonded Species

Invited lecture at Rutgers University, USA

August 18, 2014

Envelop Form of Singlet Cyclopentane-1,3-diyls: Crucial Role in Stereoselectivity in the Photochemical Denitrogenation of Cyclic Azoalkanes,

22nd IUPAC International Conference on Physical Organic Chemistry

Ottawa, Canada, August 10-15, 2014.

Caged Glutamates with π-Extended 1,2- Dihydronaphthalene Chromophore: Design, Synthesis, Two Photon Absorption (TPA) Property, and Photochemical Reactivity, 2014 Korean-Japan Bilateral Symposium on Frontier Photoscience (2014KJFP), Ewha Womans University, Seoul, Korea, June 21, 2014.

Envelop Form of Singlet Cyclopentane-1,3-diyls: Crucial Role in Stereoselectivity in the Photochemical Denitrogenation of Cyclic Azoalkanes, Generation of Long-lived Singlet Diradicaloids with pai Single-bonded Species, 2013 Korean-Japan Bilateral Symposium on Frontier Photoscience (2013KJFP), Seoul, Korea, November 25-27, 2013.

6th Heron Island Conference on Reactive Intermediates and Unusual Molecules: Synthesis and Mechanism, Heron Island, Great Barrier Reef, Queensland, Australia, 7-13th July, 2013.

Regio and Stereoselective Synthesis of Oxetanes using Photochemical Reaction

Seminar at Rennes University, Rennes February 22, 2013.

Regio and Stereoselective Synthesis of Oxetanes using Photochemical Reaction

Seminar at Reims University, Reims, February 20, 2013.

Stretch Effects Induced by Molecular Strain on Weakening s-Bonds: Molecular Design of Long-lived Diradicals (Biradicals)

The 7th Twaian-Japan Bilateral Symposium on Architecture of Functional Organic Molecues, National Chiao Tung University, Science Building 2, Hsincyu, Taiwan, October 21-24, 2012.

Molecular Design of Long-lived Singlet Diradicals with -Single Bonded Character.

Seminar at IISc, Trivandrum, India, August 8, 2012.

Molecular Design of Long-lived Singlet Diradicals with -Single Bonded Character.

Seminar at IISc, Bangarole, India, August 7, 2012.

Molecular Design of Long-lived Singlet Diradicals with -Single Bonded Character.

Seminar at CSIR-RLRI, Chenai, India, August 6, 2012.

Regio and Stereoselective Synthesis of Oxetanes using Photochemical Reaction

Seminar at the Deaprtment of Chemistry, Pondicherry University, Puducherry, August 7, 2012.

Regio- and Stereoselective Formation of Oxetanes Using Radical Ion Pairs and Triplet 1,4-Diradicals

International Symposium on Chemistry and Chemical Biology of Natural Products, CSIR-IICT, Hyderabad, India, August 2-4, 2012.

Molecular Design of Long-lived Singlet Diradicals with -Single Bonded Character.

Seminar at the Institut des Sciences Chimiques de Rennes, Rennes, France, March 23, 2012.

Interplay Between Computations and Experiments: A Case Study on Biradicals

Applied Theory On Molecular Systems, CSIR-IICT, Hyderabad, India, November 2-5, 2011.

Substituent Effect on the Reactivity of Triplet Excited State of Cyclic Azoalkanes: alpha-CN Cleavage versus beta-CC Cleavage Reaction

2011 Korean-Japan Bilateral Symposium on Frontier Photoscience (2011KJFP), Seoul, Korea, October 28-31, 2011.

Spin alignment in tetraradicals, based on the substituent effect on the ground state spin-multiplicity of localized 1,3-diyls

The 6th Taiwan-Japan Bilateral Symposium on Architecture of Functional Organic Molecules, Faculty Club, Hiroshima University, Hiroshima, Japan, August 18-20, 2011.

Spin alignment in tetraradicals, based on the substituent effect on the ground state spin-multiplicity of localized 1,3-diyls

The 2010 International Chemical Congress of Pacific Basin Societies, Honolulu, USA, December 15-20, 2010.

Notable Concentration and Temperature Dependency of Regio- and Stereoselectivity in a Photochemical [2+2] Cycloaddition Reaction (the Paternò-Büchi Reactions): Origin of the Hydroxy-Group Diarectivity

2010 Korean-Japan Bilateral Symposium on Frontier Photoscience (2010KJFP), Doejon, Korea, October 24-27, 2010.

Generation of Long-Lived Singlet Biradicaloids: Factors that Increase the Lifetime

The 5th Taiwan-Japan Bilateral Symposium on Architecture of Functional Organic Molecules, Pan-Guan Hall, NTU Chemistry Department, Taipei, Taiwan, Otober 17-20, 2010.

Factors that Increase the Lifetime of Singlet 1,3-Diradials

5th Heron Island Conference on Reactive Intermediates and Unusual Molecules: Synthesis and Mechanism, Heron Island, Australia, July 10-15, 2010.

Cooperative Effect of Nitrogen and Silicon Atoms on the Singlet-Triplet Energy Spacing in 1,3-Diradicals and the Reactivity of the Singlet States

12th Kyusyu International Symposium on Physical Organic Chemistry (KISPOC 12), Fukuoka, Japan, December 15-18, 2009

Generation of Long-lived Singlet Diradicals and Related Chemistry"

ISNA-13 Satellite Meeting, Namur (Belgium), July 27th, 2009.

Cooperative Effect of Nitrogen and Silicon Atoms on the Singlet-Triplet Energy Spacing in 1,3-Diradicals and Reactivity of Their Singlet States

International Symposium on Reactive Intermediates and Unusual Molecules (ISRIUM), Prague, Czech Republice, July 5-10, 2009

Cooperative Effect of Nitrogen and Silicon Atoms on the Singlet-Triplet Energy Spacing in 1,3-Diradicals and Reactivity of Their Singlet States.

Gordon Research Conferences on Physical Organic Chemistry, Holdness School, New Hampsher, USA, June 29-July 3, 2009

Generation of Long-lived Singlet Diradicals and Related Chemistry, Lecture at University of Cincinnati (UC), April 3, 2009.

Generation of Long-lived Singlet Diradicals and Related Chemistry, Lecture at Bowling Green State University (BGSU), April 1, 2009.

Generation of Long-lived Singlet Diradicals and Related Chemistry, Lecture at Ohio State University (OSU), March 31, 2009.

Generation of Long-lived Singlet Diradicals and Related Chemistry, Lecture at North Dakota State University (NDSU), March 28, 2009.

Generation of Long-lived Singlet Diradicals and Related Chemistry, Lecture at University of Texas at San Antonio (UTSA), March 25, 2009.

Generation of Long-lived Singlet Diradicals and Related Chemistry, Lecture at University of North Texas (UNT), March 24, 2009.

Site- and Stereoselectivity in the Photochemical Oxetane Formation Reaction (Paternò-Büchi Reaction) of Tetrahydrobenzofuranols with Benzophenone: Hydroxy-directed Diastereoselectivity?, 2008 Korea-Japan Symposium on Frontier Photoscience (KJFP 2008), September, 26, 2008.

Regio- and Stereoselective Formation of Oxetanes Using Radical Ion Pairs and Triplet 1,4-Diradicals, 10th International Symposium on Organic Free Radicals (ISOFR 10) and 3rd Pacific Symposium on Radical Chemistry (PSRC 3), Heron Island, Australia, August 5, 2008.

Selective Formation of Oxetanes via Radical Ion Pairs and Triplet 1,4-Diradicals, First Japan-Singapore Bilateral Symposium on Catalysis, Singapore, January 6-9, 2008

Photochemical Generation of Long-lived Singlet Diradicals and Their Reactivity, 2007 Korean-Japan Bilateral Symposium on Frontier Photoscience (2007KJFP), Gyeongju, Korea, November 22-26, 2007.

Generation of Singlet 1,3-Diradicals and Their Chemistry, Lecture at National Taiwan University, Taipei, Taiwan, September 21th, 2007.

Selective Formation of Oxetanes via Radical Ion Pairs and Triplet 1,4-Diradicals, Lecture at National Chiao Tung University, Hsinchu, Taiwan, September 20th, 2007.

Denitrogenation Mechanism of Cyclic Azoalkanes: Electronic Effect and Dynamics Effect, Lecture at National Tsing-Hua University, Hsinchu, Taiwan, September 19th, 2007.

Heteroatom Effects on the Reactivity of Cyclopentane-1,3-Diyls, The Post ISNA-12 Symposium on Physical Organic Chemistry in Fukuoka, Fukuoka, July 30-31, 2007.

Denitrogenation Reaction of 4-Spirocyclopropane-1-Pyrazolines: Dynamics Effects? 4th Heron Island Conference, 'Synthesis and Mechanism: Reactive Intermediates and Unusual Molecules, Australia, July 7-14, 2007.

Selective Formation of Oxetanes via Radical Ion Pairs and Triplet 1,4-Diradicals, Lecture at TU Muenchen, Germany, Jan. 11, 2007

The Chemistry of 1,3-Diradicals: Spin Control and Reactivity, Lecture at Universität Ulm, Germany, Jan. 12, 2007

Selective Formation of Oxetanes via Radical Ion Pairs and Triplet 1,4-Diradicals, Lecture at LMU Muenchen, Germany, Jan. 15, 2007

The Chemistry of 1,3-Diradicals: Spin Control and Reactivity, Lecture at Universität Erlangen-Nuernberg, Germany, Jan. 16, 2007

The Chemistry of 1,3-Diradicals: Spin Control and Reactivity, Lecture at Universität Koeln, Germany, Jan. 22, 2007

Selective Formation of Oxetanes via Radical Ion Pairs and Triplet 1,4-Diradicals, Lecture at Universität Siegen, Germany, Jan. 23, 2007

The Chemistry of 1,3-Diradicals: Spin Control and Reactivity, Lecture at Ruhr-Universität Bochum, Germany, Jan. 24, 2007

Selective Formation of Oxetanes via Radical Ion Pairs and Triplet 1,4-Diradicals, Lecture at Universität Giessen, Germany, Jan. 30, 2007

Selective Formation of Oxetanes via Radical Ion Pairs and Triplet 1,4-Diradicals, Lecture at Murcia University, Spain, Feb. 2nd, 2007

Heteroatom Effects on the Reactivity of Cyclopentane-1,3-diyls, Porquerolles International Conference on Reactive Intermediates and Unusual Molecules Porquerolles Island, France, September 2-9, 2006.

Role of Triplet 1,4-Diradical in the Selectivity of the Paterno-Buchi Reactions, The 2005 International Chemical Congress of Pacific Basin Societies, Honolulu, USA, December 15-20, 2005.

Substituent Effects on the Reactivity of Singlet Cyclopentane-1,3-diyld and the Denitrogenation Mechanism of 2,3-Diazabicyclo[2.2.1]hept-2-enes, Kyusyu International Symposium on Physical Organic Chemistry (KISPOC-XI), Fukuoka, Japan, September 12-15, 2005.

Experimental Probe for Hyperconjugative Resonance Structure of the Lowest Singlet State of 2,2-Dialkoxy-1,3-diyls: Regioselective 1,2-Oxygen Migration, International Symposium on Reactive Intermediates and Unusual Molecules, Edinburgh, Scotland, August 7-12, 2005.

Heavier Group 14 Element Effect on the Singlet-Triplet Energy Gap in 1,3-Diradicals and the Reactivity of the Singlet State, 3rd Heron Island Conference on Reactive Intermediates and Unusual Molecules, Heron Island, Australia, July 17-23, 2004.

Alkoxy Group Effect on the Singlet-Triplet Energy Gap in Cyclopentane-1,3-diyls, International Symposium on Reactive Intermediates and Unusual Molecules, Reykjavik, Iceland, August 17-22, 2003.