Spin Polarization Conservation during Triplet-Triplet Energy Transfer in Fluid Solution As Studied by Time-Resolved ESR Spectroscopy

Kimio Akiyama; Atsuko Kaneko; Shozo Tero-Kubota; Yusaku Ikegami

doi:10.1021/ja00165a006

Spin Polarization Conservation during Triplet-Triplet Energy Transfer in Fluid Solution As Studied by Time-Resolved ESR Spectroscopy

Kimio Akiyama, Atsuko Kaneko, Shozo Tero-Kubota, Yusaku Ikegami

Division of Organic- and Biomaterials Research

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

10 Citations (Scopus)

Abstract

Electron spin polarization of pyridinyl radicals generated from the photosensitized dissociation of the dimers was studied. Addition of triplet sensitizer to the dimer solution induced drastic change in the CIDEP spectrum. Examinations of the dependence of spectral change on the T₁state energy level and the spin alignment in the T₁sublevels of sensitizers lead to the conclusion that energy transfer between the pyridinyl dimer and the sensitizer occurred and that the spin polarization was conserved during the process. From a series of triplet donors, nonphosphorescent T₁states of two types of pyridinyl dimers were estimated to be 2.43 eV for the 2, 2'-dimer of 1-methyl-4-tert-butylpyridinyl and 2.65 eV for the 4, 4'-dimer of 1-methylpyridinyl.

Original language	English
Pages (from-to)	3297-3301
Number of pages	5
Journal	Journal of the American Chemical Society
Volume	112
Issue number	9
DOIs	https://doi.org/10.1021/ja00165a006
Publication status	Published - 1990 Jan 1

ASJC Scopus subject areas

Catalysis
Chemistry(all)
Biochemistry
Colloid and Surface Chemistry

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title = "Spin Polarization Conservation during Triplet-Triplet Energy Transfer in Fluid Solution As Studied by Time-Resolved ESR Spectroscopy",

abstract = "Electron spin polarization of pyridinyl radicals generated from the photosensitized dissociation of the dimers was studied. Addition of triplet sensitizer to the dimer solution induced drastic change in the CIDEP spectrum. Examinations of the dependence of spectral change on the T1state energy level and the spin alignment in the T1sublevels of sensitizers lead to the conclusion that energy transfer between the pyridinyl dimer and the sensitizer occurred and that the spin polarization was conserved during the process. From a series of triplet donors, nonphosphorescent T1states of two types of pyridinyl dimers were estimated to be 2.43 eV for the 2, 2'-dimer of 1-methyl-4-tert-butylpyridinyl and 2.65 eV for the 4, 4'-dimer of 1-methylpyridinyl.",

author = "Kimio Akiyama and Atsuko Kaneko and Shozo Tero-Kubota and Yusaku Ikegami",

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T1 - Spin Polarization Conservation during Triplet-Triplet Energy Transfer in Fluid Solution As Studied by Time-Resolved ESR Spectroscopy

AU - Akiyama, Kimio

AU - Kaneko, Atsuko

AU - Tero-Kubota, Shozo

AU - Ikegami, Yusaku

PY - 1990/1/1

Y1 - 1990/1/1

N2 - Electron spin polarization of pyridinyl radicals generated from the photosensitized dissociation of the dimers was studied. Addition of triplet sensitizer to the dimer solution induced drastic change in the CIDEP spectrum. Examinations of the dependence of spectral change on the T1state energy level and the spin alignment in the T1sublevels of sensitizers lead to the conclusion that energy transfer between the pyridinyl dimer and the sensitizer occurred and that the spin polarization was conserved during the process. From a series of triplet donors, nonphosphorescent T1states of two types of pyridinyl dimers were estimated to be 2.43 eV for the 2, 2'-dimer of 1-methyl-4-tert-butylpyridinyl and 2.65 eV for the 4, 4'-dimer of 1-methylpyridinyl.

AB - Electron spin polarization of pyridinyl radicals generated from the photosensitized dissociation of the dimers was studied. Addition of triplet sensitizer to the dimer solution induced drastic change in the CIDEP spectrum. Examinations of the dependence of spectral change on the T1state energy level and the spin alignment in the T1sublevels of sensitizers lead to the conclusion that energy transfer between the pyridinyl dimer and the sensitizer occurred and that the spin polarization was conserved during the process. From a series of triplet donors, nonphosphorescent T1states of two types of pyridinyl dimers were estimated to be 2.43 eV for the 2, 2'-dimer of 1-methyl-4-tert-butylpyridinyl and 2.65 eV for the 4, 4'-dimer of 1-methylpyridinyl.

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Spin Polarization Conservation during Triplet-Triplet Energy Transfer in Fluid Solution As Studied by Time-Resolved ESR Spectroscopy

Abstract

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