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Masuhara H. Time-Resolved Spectroscopic and Imaging Studies on Laser Ablation of Molecular Systems: From Mechanistic Study to Bio/Nano Applications. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2013. [DOI: 10.1246/bcsj.20130066] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Hiroshi Masuhara
- Department of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University
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Ohkubo K, Suga K, Morikawa K, Fukuzumi S. Selective Oxygenation of Ring-Substituted Toluenes with Electron-Donating and -Withdrawing Substituents by Molecular Oxygen via Photoinduced Electron Transfer. J Am Chem Soc 2003; 125:12850-9. [PMID: 14558834 DOI: 10.1021/ja036645r] [Citation(s) in RCA: 91] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A ring-substituted toluene with an electron-withdrawing substituent, p-tolunitrile, is oxygenated by molecular oxygen to yield the corresponding aldehyde with tetrafluoro-p-dicyanobenzene as a photocatalyst under photoirradiation with an Hg lamp (lambda > 300 nm). The oxygenation of a ring-substituted toluene with an electron-donating substituent, p-xylene, by molecular oxygen is also achieved with 10-methyl-9-phenylacridinium ion as a photocatalyst under visible light irradiation, yielding p-tolualdehyde exclusively as the final oxygenated product. Both the oxygenation reactions are initiated by photoinduced electron transfer from the ring-substituted toluene to the singlet excited state of the photocatalyst. The reason for the high selectivity in the photocatalytic oxygenation of various toluene derivatives by molecular oxygen is discussed on the basis of the photoinduced electron transfer mechanism that does not involve the autoxidation process (radical chain reactions). The reactive intermediates in the photocatalytic cycle are successfully detected as the transient absorption spectra and the electron spin resonance spectra.
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Affiliation(s)
- Kei Ohkubo
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, CREST, Japan Science and Technology Corporation, Suita, Osaka 565-0871, Japan
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Georgiou S, Koubenakis A. Laser-induced material ejection from model molecular solids and liquids: mechanisms, implications, and applications. Chem Rev 2003; 103:349-94. [PMID: 12580635 DOI: 10.1021/cr010429o] [Citation(s) in RCA: 107] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Savas Georgiou
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, PO Box 1527, 71110 Heraklion, Crete, Greece.
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Hatanaka K, Tsuboi Y, Fukumura H, Masuhara H. Nanosecond and Femtosecond Laser Photochemistry and Ablation Dynamics of Neat Liquid Benzenes. J Phys Chem B 2002. [DOI: 10.1021/jp014332h] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Koji Hatanaka
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai, Miyagi 980-8578, Japan, Department of Chemistry, Graduate School of Science, Hokkaido University, Sapporo, Hokkaido 060-0812, Japan, and Department of Applied Physics and Frontier Research Center, Osaka University, Suita, Osaka 565-0871, Japan
| | - Yasuyuki Tsuboi
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai, Miyagi 980-8578, Japan, Department of Chemistry, Graduate School of Science, Hokkaido University, Sapporo, Hokkaido 060-0812, Japan, and Department of Applied Physics and Frontier Research Center, Osaka University, Suita, Osaka 565-0871, Japan
| | - Hiroshi Fukumura
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai, Miyagi 980-8578, Japan, Department of Chemistry, Graduate School of Science, Hokkaido University, Sapporo, Hokkaido 060-0812, Japan, and Department of Applied Physics and Frontier Research Center, Osaka University, Suita, Osaka 565-0871, Japan
| | - Hiroshi Masuhara
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai, Miyagi 980-8578, Japan, Department of Chemistry, Graduate School of Science, Hokkaido University, Sapporo, Hokkaido 060-0812, Japan, and Department of Applied Physics and Frontier Research Center, Osaka University, Suita, Osaka 565-0871, Japan
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Kim H, Kim TG, Hahn J, Jang DJ, Chang DJ, Park BS. Photolysis Dynamics of Cyclopropyl and Oxiranyl Aryl Ketones: Drastic Ring-Activation Effect of Oxygen. J Phys Chem A 2001. [DOI: 10.1021/jp004061v] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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