Picosecond spectroscopic measurement of very fast intersystem crossing for 9,10-dioxa-anti-bimanes

Dan Huppert; Hanna Dodiuk; Hannah Kanety; Edward M. Kosower

doi:10.1016/0009-2614(79)80150-5

Picosecond spectroscopic measurement of very fast intersystem crossing for 9,10-dioxa-anti-bimanes

Dan Huppert^*, Hanna Dodiuk, Hannah Kanety, Edward M. Kosower

^*Corresponding author for this work

School of Chemistry

Tel Aviv University

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

21 Scopus citations

Abstract

Picosecond spectroscopy, following the buildup of T₁ → T_n absorption (maximum at 420 nm), shows that the T₁ state of 1,5-diazabicyclo[3,3,0]octa-3,7-diene-2,6-diones(9,10-dioxa-anti-bimanes) is formed within about 10 ps. The nature of the T₁ state was confirmed by decay rates of T₁ → T_n absorption in acetonitrile (n = 0.375 cP, k_nr = 4.5 × 10⁵ s^-1), 1,2-ethanediol (n = 26 cP, k_nr = 1.5 × 10⁴ s^-1 and glycerol (n = 1400 cP, k_nr = 1.3 × 10³ s^-1). The very fast intersystem crossing is ascribed to the proximity of a ³nπ* state to the ππ* (S₁ state produced by light absorption (El-Sayed rule).

Original language	English
Pages (from-to)	164-168
Number of pages	5
Journal	Chemical Physics Letters
Volume	65
Issue number	1
DOIs	https://doi.org/10.1016/0009-2614(79)80150-5
State	Published - 1 Aug 1979

Funding

Funders	Funder number
Batsheva de Rothsehi!d Foundation

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title = "Picosecond spectroscopic measurement of very fast intersystem crossing for 9,10-dioxa-anti-bimanes",

abstract = "Picosecond spectroscopy, following the buildup of T1 → Tn absorption (maximum at 420 nm), shows that the T1 state of 1,5-diazabicyclo[3,3,0]octa-3,7-diene-2,6-diones(9,10-dioxa-anti-bimanes) is formed within about 10 ps. The nature of the T1 state was confirmed by decay rates of T1 → Tn absorption in acetonitrile (n = 0.375 cP, knr = 4.5 × 105 s-1), 1,2-ethanediol (n = 26 cP, knr = 1.5 × 104 s-1 and glycerol (n = 1400 cP, knr = 1.3 × 103 s-1). The very fast intersystem crossing is ascribed to the proximity of a 3nπ* state to the ππ* (S1 state produced by light absorption (El-Sayed rule).",

author = "Dan Huppert and Hanna Dodiuk and Hannah Kanety and Kosower, {Edward M.}",

note = "Funding Information: Science Foundation to D-H_ and E.M.K. is gratefully ;Icknowledged_ Helpful discussion with Professor J_ Jortner is appreciated_ The assistance provided by Joshua Hermolin with some of the experiments was invahrable-Bar& Pazhenchevsky kindly provided the aMi-binlane sampks. Hanna Dodiuk is grateful for support from the Batsheva de Rothsehi!d Foundation_",

year = "1979",

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doi = "10.1016/0009-2614(79)80150-5",

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T1 - Picosecond spectroscopic measurement of very fast intersystem crossing for 9,10-dioxa-anti-bimanes

AU - Huppert, Dan

AU - Dodiuk, Hanna

AU - Kanety, Hannah

AU - Kosower, Edward M.

N1 - Funding Information: Science Foundation to D-H_ and E.M.K. is gratefully ;Icknowledged_ Helpful discussion with Professor J_ Jortner is appreciated_ The assistance provided by Joshua Hermolin with some of the experiments was invahrable-Bar& Pazhenchevsky kindly provided the aMi-binlane sampks. Hanna Dodiuk is grateful for support from the Batsheva de Rothsehi!d Foundation_

PY - 1979/8/1

Y1 - 1979/8/1

N2 - Picosecond spectroscopy, following the buildup of T1 → Tn absorption (maximum at 420 nm), shows that the T1 state of 1,5-diazabicyclo[3,3,0]octa-3,7-diene-2,6-diones(9,10-dioxa-anti-bimanes) is formed within about 10 ps. The nature of the T1 state was confirmed by decay rates of T1 → Tn absorption in acetonitrile (n = 0.375 cP, knr = 4.5 × 105 s-1), 1,2-ethanediol (n = 26 cP, knr = 1.5 × 104 s-1 and glycerol (n = 1400 cP, knr = 1.3 × 103 s-1). The very fast intersystem crossing is ascribed to the proximity of a 3nπ* state to the ππ* (S1 state produced by light absorption (El-Sayed rule).

AB - Picosecond spectroscopy, following the buildup of T1 → Tn absorption (maximum at 420 nm), shows that the T1 state of 1,5-diazabicyclo[3,3,0]octa-3,7-diene-2,6-diones(9,10-dioxa-anti-bimanes) is formed within about 10 ps. The nature of the T1 state was confirmed by decay rates of T1 → Tn absorption in acetonitrile (n = 0.375 cP, knr = 4.5 × 105 s-1), 1,2-ethanediol (n = 26 cP, knr = 1.5 × 104 s-1 and glycerol (n = 1400 cP, knr = 1.3 × 103 s-1). The very fast intersystem crossing is ascribed to the proximity of a 3nπ* state to the ππ* (S1 state produced by light absorption (El-Sayed rule).

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Picosecond spectroscopic measurement of very fast intersystem crossing for 9,10-dioxa-anti-bimanes

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