Structural effects on the radiationless transition from the T1 states of tropone derivatives

Tadaaki Ikoma; Kimio Akiyama; Shozo Tero-Kubota; Yusaku Ikegami

doi:10.1021/j100104a008

Structural effects on the radiationless transition from the T₁ states of tropone derivatives

Tadaaki Ikoma, Kimio Akiyama, Shozo Tero-Kubota, Yusaku Ikegami

多元物質科学研究所・有機・生命科学研究部門

研究成果: Article › 査読

3 被引用数 (Scopus)

抄録

The T₁ states of nonphosphorescent 2,3-benzotropone and phosphorescent 4,5-benzotropone were studied by a time-resolved EPR method. For 2,3-benzotropone, the observed magnetic parameters and the decay rate (the average decay rate 1.1 × 10⁵ s^-1 at 4.2 K) are very similar to those of the parent tropone. On the other hand, 4,5-benzotropone has different magnetic properties and a much slower radiationless decay rate (<30 s^-1) than tropone. The mechanism of the fast radiationless transition between the T₁ and S₀ states of tropone has been discussed.

本文言語	English
ページ（範囲）	303-305
ページ数	3
ジャーナル	Journal of physical chemistry
巻	97
号	2
DOI	https://doi.org/10.1021/j100104a008
出版ステータス	Published - 1993 1 1

ASJC Scopus subject areas

Engineering(all)
Physical and Theoretical Chemistry

文献へのアクセス

10.1021/j100104a008

他のファイルとリンク

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引用スタイル

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abstract = "The T1 states of nonphosphorescent 2,3-benzotropone and phosphorescent 4,5-benzotropone were studied by a time-resolved EPR method. For 2,3-benzotropone, the observed magnetic parameters and the decay rate (the average decay rate 1.1 × 105 s-1 at 4.2 K) are very similar to those of the parent tropone. On the other hand, 4,5-benzotropone has different magnetic properties and a much slower radiationless decay rate (<30 s-1) than tropone. The mechanism of the fast radiationless transition between the T1 and S0 states of tropone has been discussed.",

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T1 - Structural effects on the radiationless transition from the T1 states of tropone derivatives

AU - Ikoma, Tadaaki

AU - Akiyama, Kimio

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AU - Ikegami, Yusaku

PY - 1993/1/1

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N2 - The T1 states of nonphosphorescent 2,3-benzotropone and phosphorescent 4,5-benzotropone were studied by a time-resolved EPR method. For 2,3-benzotropone, the observed magnetic parameters and the decay rate (the average decay rate 1.1 × 105 s-1 at 4.2 K) are very similar to those of the parent tropone. On the other hand, 4,5-benzotropone has different magnetic properties and a much slower radiationless decay rate (<30 s-1) than tropone. The mechanism of the fast radiationless transition between the T1 and S0 states of tropone has been discussed.

AB - The T1 states of nonphosphorescent 2,3-benzotropone and phosphorescent 4,5-benzotropone were studied by a time-resolved EPR method. For 2,3-benzotropone, the observed magnetic parameters and the decay rate (the average decay rate 1.1 × 105 s-1 at 4.2 K) are very similar to those of the parent tropone. On the other hand, 4,5-benzotropone has different magnetic properties and a much slower radiationless decay rate (<30 s-1) than tropone. The mechanism of the fast radiationless transition between the T1 and S0 states of tropone has been discussed.

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