HIGHER EXCITED SINGLET-STATE OF DIPHENYLACETYLENE IN SOLUTION-PHASE

被引：25

作者：

HIRATA, Y ^{[1
]}

OKADA, T ^{[1
]}

NOMOTO, T ^{[1
]}

机构：

[1] MIE UNIV,FAC EDUC,DEPT CHEM,TSU,MIE 514,JAPAN

来源：

CHEMICAL PHYSICS LETTERS | 1993年 / 209卷 / 04期

关键词：

D O I：

10.1016/0009-2614(93)80037-P

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

By using picosecond transient absorption spectral measurement techniques, we have investigated photophysical properties of several mono-substituted diphenylacetylenes (DPA). The strongly temperature dependent S2-->S1 internal conversion which was reported for DPA previously was observed for methoxy-DPA, hydroxy-DPA, and chloro-DPA. In these compounds the S2 and S1 states are fluorescent B-1(1u) and nonfluorescent 1A(g) or B-1(2u), respectively, while the S1 state of cyano-DPA and CH3COO-DPA should be fluorescent B-1(1u) The probable mechanism of the S2-->S1 internal conversion, where the promoting vibrational mode was excited in the S2 state, was proposed on the basis of the results that the former group has a similar activation energy of the internal conversion.

引用

页码：397 / 402

页数：6

共 14 条

[1] STATISTICAL-LIMIT LINE BROADENING IN THE S-2 STATE OF PHENANTHRENE IN SUPERSONIC JETS [J].