論文

査読有り
2007年1月

The first observation of the effect of dendritic structure to produce the triplet excited state of the core stilbene by dendron excitation

TETRAHEDRON LETTERS
  • Yousuke Miura
  • ,
  • Atsuya Momotake
  • ,
  • Yoshihiro Shinohara
  • ,
  • Md. Wahadoszamen
  • ,
  • Yoshinobu Nishimura
  • ,
  • Tatsuo Arai

48
4
開始ページ
639
終了ページ
641
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.tetlet.2006.11.109
出版者・発行元
PERGAMON-ELSEVIER SCIENCE LTD

We report that both singlet and triplet energy transfers in stilbene-cored benzophenone dendrimers (trans-BPST) took place quite efficiently. On excitation (290 nm) of stilbene group, the intramolecular singlet energy transfer from the excited core stilbene to the benzophenone part (99.7%) was confirmed by quenching of the fluorescence from the core stilbene. The benzophenone in the excited singlet state is known to undergo intersystem crossing to give its excited triplet state quantitatively. However, the very weak phosphorescence from benzophenone part in trans-BPST was observed even at 77 K. The phosphorescence intensity of trans-BPST is only 1% of that of model compound (4-methylbenzophenone) at 77 K. During the irradiation, the absorption spectra also changed due to the trans-cis isomerization. This is probably due to the ultrafast triplet energy transfer from the benzophenone to produce the triplet state stilbene. (c) 2006 Published by Elsevier Ltd.

Web of Science ® 被引用回数 : 12

リンク情報
DOI
https://doi.org/10.1016/j.tetlet.2006.11.109
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000243704000027&DestApp=WOS_CPL
ID情報
  • DOI : 10.1016/j.tetlet.2006.11.109
  • ISSN : 0040-4039
  • Web of Science ID : WOS:000243704000027

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