Photochemical behavior of 2-[2-(2-pyridyl)ethenyl]indole on triplet sensitization. Spin multiplicity dependence of the isomerization modes of an intramolecularly hydrogen-bonded compound

Tatsuo Arai; Masaki Obi; Takeshi Iwasaki; Katsumi Tokumaru; Frederick D. Lewis

doi:10.1016/1010-6030(95)04275-X

Photochemical behavior of 2-[2-(2-pyridyl)ethenyl]indole on triplet sensitization. Spin multiplicity dependence of the isomerization modes of an intramolecularly hydrogen-bonded compound

Tatsuo Arai^*, Masaki Obi, Takeshi Iwasaki, Katsumi Tokumaru, Frederick D. Lewis

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

Although 2-[2-(2-pyridyl) ethenyl] indole undergoes one-way E→Z isomerization in the excited singlet state, it isomerizes between the E and Z isomers in the excited triplet state. On the basis of the determination of the quantum yields of isomerization and the photostationary state isomer ratios, as well as transient spectroscopic measurements, the potential energy surfaces for E-Z isomerization in the triplet state have been proposed. Specific rotamers of the E and Z isomers are found to be responsible for the triplet state isomerization reactions.

Original language	English (US)
Pages (from-to)	65-69
Number of pages	5
Journal	Journal of Photochemistry and Photobiology A: Chemistry
Volume	96
Issue number	1-3
DOIs	https://doi.org/10.1016/1010-6030(95)04275-X
State	Published - May 31 1996

Keywords

Intramolecular hydrogen bond
Isoraerization
T-T absorption

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Physics and Astronomy(all)

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10.1016/1010-6030(95)04275-X

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Arai, T., Obi, M., Iwasaki, T., Tokumaru, K., & Lewis, F. D. (1996). Photochemical behavior of 2-[2-(2-pyridyl)ethenyl]indole on triplet sensitization. Spin multiplicity dependence of the isomerization modes of an intramolecularly hydrogen-bonded compound. Journal of Photochemistry and Photobiology A: Chemistry, 96(1-3), 65-69. https://doi.org/10.1016/1010-6030(95)04275-X

Arai, Tatsuo ; Obi, Masaki ; Iwasaki, Takeshi ; Tokumaru, Katsumi ; Lewis, Frederick D. / Photochemical behavior of 2-[2-(2-pyridyl)ethenyl]indole on triplet sensitization. Spin multiplicity dependence of the isomerization modes of an intramolecularly hydrogen-bonded compound. In: Journal of Photochemistry and Photobiology A: Chemistry. 1996 ; Vol. 96, No. 1-3. pp. 65-69.

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title = "Photochemical behavior of 2-[2-(2-pyridyl)ethenyl]indole on triplet sensitization. Spin multiplicity dependence of the isomerization modes of an intramolecularly hydrogen-bonded compound",

abstract = "Although 2-[2-(2-pyridyl) ethenyl] indole undergoes one-way E→Z isomerization in the excited singlet state, it isomerizes between the E and Z isomers in the excited triplet state. On the basis of the determination of the quantum yields of isomerization and the photostationary state isomer ratios, as well as transient spectroscopic measurements, the potential energy surfaces for E-Z isomerization in the triplet state have been proposed. Specific rotamers of the E and Z isomers are found to be responsible for the triplet state isomerization reactions.",

keywords = "Intramolecular hydrogen bond, Isoraerization, T-T absorption",

author = "Tatsuo Arai and Masaki Obi and Takeshi Iwasaki and Katsumi Tokumaru and Lewis, {Frederick D.}",

note = "Funding Information: Work at the University of Tsukuba was supported by the Ministry of Education, Science and Culture, Grant-in-Aid for Specially Promoted Research No. 03101004.",

year = "1996",

month = may,

day = "31",

doi = "10.1016/1010-6030(95)04275-X",

language = "English (US)",

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Arai, T, Obi, M, Iwasaki, T, Tokumaru, K & Lewis, FD 1996, 'Photochemical behavior of 2-[2-(2-pyridyl)ethenyl]indole on triplet sensitization. Spin multiplicity dependence of the isomerization modes of an intramolecularly hydrogen-bonded compound', Journal of Photochemistry and Photobiology A: Chemistry, vol. 96, no. 1-3, pp. 65-69. https://doi.org/10.1016/1010-6030(95)04275-X

Photochemical behavior of 2-[2-(2-pyridyl)ethenyl]indole on triplet sensitization. Spin multiplicity dependence of the isomerization modes of an intramolecularly hydrogen-bonded compound. / Arai, Tatsuo; Obi, Masaki; Iwasaki, Takeshi; Tokumaru, Katsumi; Lewis, Frederick D.

In: Journal of Photochemistry and Photobiology A: Chemistry, Vol. 96, No. 1-3, 31.05.1996, p. 65-69.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Photochemical behavior of 2-[2-(2-pyridyl)ethenyl]indole on triplet sensitization. Spin multiplicity dependence of the isomerization modes of an intramolecularly hydrogen-bonded compound

AU - Arai, Tatsuo

AU - Obi, Masaki

AU - Iwasaki, Takeshi

AU - Tokumaru, Katsumi

AU - Lewis, Frederick D.

N1 - Funding Information: Work at the University of Tsukuba was supported by the Ministry of Education, Science and Culture, Grant-in-Aid for Specially Promoted Research No. 03101004.

PY - 1996/5/31

Y1 - 1996/5/31

N2 - Although 2-[2-(2-pyridyl) ethenyl] indole undergoes one-way E→Z isomerization in the excited singlet state, it isomerizes between the E and Z isomers in the excited triplet state. On the basis of the determination of the quantum yields of isomerization and the photostationary state isomer ratios, as well as transient spectroscopic measurements, the potential energy surfaces for E-Z isomerization in the triplet state have been proposed. Specific rotamers of the E and Z isomers are found to be responsible for the triplet state isomerization reactions.

AB - Although 2-[2-(2-pyridyl) ethenyl] indole undergoes one-way E→Z isomerization in the excited singlet state, it isomerizes between the E and Z isomers in the excited triplet state. On the basis of the determination of the quantum yields of isomerization and the photostationary state isomer ratios, as well as transient spectroscopic measurements, the potential energy surfaces for E-Z isomerization in the triplet state have been proposed. Specific rotamers of the E and Z isomers are found to be responsible for the triplet state isomerization reactions.

KW - Intramolecular hydrogen bond

KW - Isoraerization

KW - T-T absorption

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JF - Journal of Photochemistry and Photobiology A: Chemistry

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Photochemical behavior of 2-[2-(2-pyridyl)ethenyl]indole on triplet sensitization. Spin multiplicity dependence of the isomerization modes of an intramolecularly hydrogen-bonded compound

Abstract

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