論文

査読有り
2005年11月

Enhancement of the large Stokes-shifted fluorescence emission from the 2-(2 '-hydroxyphenyl)benzoxazole core in a dendrimer

JOURNAL OF PHYSICAL CHEMISTRY A
  • A Ohshima
  • ,
  • A Momotake
  • ,
  • R Nagahata
  • ,
  • T Arai

109
43
開始ページ
9731
終了ページ
9736
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1021/jp053702p
出版者・発行元
AMER CHEMICAL SOC

The photochemical properties of a series of newly synthesized dendrimers, 4-6, having a 2-(2'-hydroxyphenyl)benzoxazole (HBO) core, were studied in benzene. The fluorescence quantum yields (Phi(f)) were determined to be 0.022, 0.030, and 0.038 for 4, 5, and 6, respectively, increasing in higher generation dendrimers. With transient absorption spectroscopy, the quantum yields of the isomerization from the (E)-keto form (K-1(E)*) to the (Z)-keto form ((1)Kz) (Phi(E)->(Z)) and those of intersystem crossing (Phi(isc)) can be estimated. Whereas Phi(E -> Z) values decreased in higher generation dendrimers, Phi(isc) values were almost the same among 4-6. The quantum yields of nonradiative decay (Phi(nr)) increased in higher generation dendrimers. The dendrimer structure also affected the reverse tautomerization process.

Web of Science ® 被引用回数 : 53

リンク情報
DOI
https://doi.org/10.1021/jp053702p
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000232959700005&DestApp=WOS_CPL
ID情報
  • DOI : 10.1021/jp053702p
  • ISSN : 1089-5639
  • Web of Science ID : WOS:000232959700005

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