The problem of triplet self-quenching in thioketone photochemistry

V. Ramesh; N. Ramnath; V. Ramamurthy

doi:10.1016/0047-2670(83)80056-2

The problem of triplet self-quenching in thioketone photochemistry

V. Ramesh, N. Ramnath, V. Ramamurthy

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

18 Scopus citations

Abstract

The highly efficient quenching of the thioketone triplet state by ground state thioketones with various electronic and structural features was investigated by means of phosphorescence quenching measurements in a number of solvents. Electron-withdrawing groups conjugated to the thioketone chromophore and steric crowding around the lone pair of electrons on the sulphur atom tend to decrease the quenching rate. The ground state thioketone quencher acts as the donor and the excited thioketone phosphorescer acts as the acceptor in the quenching process. Possible involvement of triplet excimers was investigated but no excimer or heteroexcimer emission was observed.

Original language	English (US)
Pages (from-to)	141-148
Number of pages	8
Journal	Journal of Photochemistry
Volume	23
Issue number	2
DOIs	https://doi.org/10.1016/0047-2670(83)80056-2
State	Published - 1983
Externally published	Yes

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title = "The problem of triplet self-quenching in thioketone photochemistry",

abstract = "The highly efficient quenching of the thioketone triplet state by ground state thioketones with various electronic and structural features was investigated by means of phosphorescence quenching measurements in a number of solvents. Electron-withdrawing groups conjugated to the thioketone chromophore and steric crowding around the lone pair of electrons on the sulphur atom tend to decrease the quenching rate. The ground state thioketone quencher acts as the donor and the excited thioketone phosphorescer acts as the acceptor in the quenching process. Possible involvement of triplet excimers was investigated but no excimer or heteroexcimer emission was observed.",

author = "V. Ramesh and N. Ramnath and V. Ramamurthy",

note = "Funding Information: We are grateful to Professor P. Balaram for allowing us to use the spectrofluorometer. The Department of Atomic Energy and the Department of Science and Technology, Government of India, are thanked for financial support.",

year = "1983",

doi = "10.1016/0047-2670(83)80056-2",

language = "English (US)",

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T1 - The problem of triplet self-quenching in thioketone photochemistry

AU - Ramesh, V.

AU - Ramnath, N.

AU - Ramamurthy, V.

N1 - Funding Information: We are grateful to Professor P. Balaram for allowing us to use the spectrofluorometer. The Department of Atomic Energy and the Department of Science and Technology, Government of India, are thanked for financial support.

PY - 1983

Y1 - 1983

N2 - The highly efficient quenching of the thioketone triplet state by ground state thioketones with various electronic and structural features was investigated by means of phosphorescence quenching measurements in a number of solvents. Electron-withdrawing groups conjugated to the thioketone chromophore and steric crowding around the lone pair of electrons on the sulphur atom tend to decrease the quenching rate. The ground state thioketone quencher acts as the donor and the excited thioketone phosphorescer acts as the acceptor in the quenching process. Possible involvement of triplet excimers was investigated but no excimer or heteroexcimer emission was observed.

AB - The highly efficient quenching of the thioketone triplet state by ground state thioketones with various electronic and structural features was investigated by means of phosphorescence quenching measurements in a number of solvents. Electron-withdrawing groups conjugated to the thioketone chromophore and steric crowding around the lone pair of electrons on the sulphur atom tend to decrease the quenching rate. The ground state thioketone quencher acts as the donor and the excited thioketone phosphorescer acts as the acceptor in the quenching process. Possible involvement of triplet excimers was investigated but no excimer or heteroexcimer emission was observed.

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JO - Journal of Photochemistry

JF - Journal of Photochemistry

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The problem of triplet self-quenching in thioketone photochemistry

Abstract

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