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No.54 (1992/10) >

Title :Franck-Condon Analysis for the Carbonyl Stretching Progression Bands in Phosphorescence Spectra of 4-Chromanone at 4.2K
Authors :Miyagi, Yusei
Authors alternative :宮城, 雄清
Issue Date :Oct-1992
Abstract :Phosphorescence spectra of 4-chromanone have been studied optically at 4.2 K in methyicyclohexane host. The energy level of the lowest excited triplet state is determined. The Franck-Condon envelope of the 4-chromanone phosphorescence ixhibits predominantly a three quanta v_<c=0> progression. The observation of the v_<c=0> sequence bands suggests a geometry change between the ground and T_1 states involving the carbonyl local site. From the Franck-Condon analysis for v_<c=0> sequence bands, the stable C = O bond distance in the phosphorescent state is estimated to be lengthening by 6.2 per cent of the ground state equilibrium distance upon electronic excitation to the T_1 state.
Type Local :紀要論文
ISSN :0286-9640
Publisher :琉球大学理学部
URI :http://hdl.handle.net/20.500.12000/14212
Citation :琉球大学理学部紀要 = Bulletin of the College of Science. University of the Ryukyus no.54 p.35 -39
Appears in Collections:No.54 (1992/10)

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