論文

査読有り
2013年8月

Dynamical Excimer Formation in Rigid Carbazolophane via Charge Transfer State

JOURNAL OF PHYSICAL CHEMISTRY A
  • Yasunari Tamai
  • ,
  • Hideo Ohkita
  • ,
  • Jiro Shimada
  • ,
  • Hiroaki Benten
  • ,
  • Shinzaburo Ito
  • ,
  • Sho Yamanaka
  • ,
  • Kenji Hisada
  • ,
  • Keita Tani
  • ,
  • Koji Kubono
  • ,
  • Teruo Shinmyozu

117
33
開始ページ
7776
終了ページ
7785
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1021/jp402126a
出版者・発行元
AMER CHEMICAL SOC

Formation dynamics of intramolecular excimer in dioxa[3.3](3,6)carbazolophane (CzOCz) was studied by time-resolved spectroscopic methods and computational calculations. In the ground state, the most stable conformer in CzOCz is the anti-conformation where two carbazole rings are in antiparallel alignment. No other isomers were observed even after the solution was heated up to 150 degrees C, although three characteristic isomers were found by the molecular mechanics calculation: the first is the anti-conformer, the second is the syn-conformer where two carbazole rings are stacked in the same direction, and the third is the int-conformer where two carbazole rings are aligned in an edge-to-face geometry. Because of the anti-conformation, the interchromophoric interaction in CzOCz is negligible in the ground state. Nonetheless, the intramolecular excimer in CzOCz was dynamically formed in an acetonitrile (MeCN) solution, indicating strong interchromophoric interaction and the isomerization from the anti- to syn-conformation in the excited state. The excimer formation in CzOCz is more efficient in polar solvents than in less polar solvents, suggesting the contribution of the charge transfer (CT) state to the excimer formation. The stabilization in the excited state is discussed in terms of molecular orbital interaction between two carbazole rings. The solvent-polarity-induced excimer formation is discussed in terms of the CT character in the int-conformation.

リンク情報
DOI
https://doi.org/10.1021/jp402126a
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000323593700014&DestApp=WOS_CPL
ID情報
  • DOI : 10.1021/jp402126a
  • ISSN : 1089-5639
  • Web of Science ID : WOS:000323593700014

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