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1998 | 94 | 4 | 627-636
Article title

Photophysical Properties of Diphenylacetylene and Diphenylbutadiyne Derivatives in Solution Phase

Content
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Languages of publication
EN
Abstracts
EN
By using the femtosecond and picosecond transient absorption measurement techniques, we have investigated diphenylacetylene, diphenylbutadiyne, and their methoxy and cyano derivatives in the solution phase. Both the rapid S_{2} → S_{1} internal conversion in the subpicosecond time scale and the triplet formation in the tens of picosecond region were observed for diphenylbutadiyne and its methoxy derivatives, while the dynamic behavior of dimethoxy-diphenylacetylene was quite similar to that of diphenyl acetylene. The level inversion of the lowest excited singlet states of dicyano-diphenylbutadiyne was observed. The thermally activated S_{2} ← S_{1} internal conversion was not negligible and the sum of the rate constants of S_{2} → S_{1} and S_{2} ← S_{1} internal conversions was estimated to be about 5 × 10^{11} s^{-1} at room temperature.
Keywords
EN
Publisher

Year
Volume
94
Issue
4
Pages
627-636
Physical description
Dates
published
1998-10
received
1998-07-23
Contributors
author
  • Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka 560-8531, Japan
author
  • Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka 560-8531, Japan
  • Research Center for Materials Science at Extreme Conditions, Osaka University, Toyonaka 560-8531, Japan
author
  • Department of Chemistry, Faculty of Education, Mie University, Tsu 514-0008, Japan
References
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv94z401kz
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