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Acta Chimica Sinica ›› 2010, Vol. 68 ›› Issue (22): 2285-2289. Previous Articles     Next Articles

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基于2-(2 -羟基苯基)苯并噻唑的激发态分子内质子转移化合物的光物理行为研究

钱妍*，蔡敏敏，解令海,黄维*   

  1. (南京邮电大学有机电子与信息显示国家重点实验室培育基地 信息材料与纳米技术研究院 南京 210046)
  • 投稿日期:2010-03-24 修回日期:2010-09-16 发布日期:2010-09-16
  • 通讯作者: 钱妍 E-mail:iamyqian@njupt.edu.cn

Investigation of the Photophysical Behavior for the Excited State Intramolecular Proton Transfer Compound Based on 2-(2 -Hydroxyphenyl)Benzothiazole

QIAN Yan, CAI Min-Min, JIE Ling-Hai, HUANG Wei   

  1. (Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, Nanjing 210046)
  • Received:2010-03-24 Revised:2010-09-16 Published:2010-09-16
  • Contact: Yan Qian E-mail:iamyqian@njupt.edu.cn

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By spectrum analysis and theoretical calculation, the photophysics of the excited state for the excited state intramolecular proton transfer (ESIPT) compound, DHBIA {N,N-di[3-hydroxy-4- (2-benzothiazole)phenyl]5-tert-butyl-isophthalic amide}, was thoroughly investigated. It was revealed that the vertical normal enol excited state favored an extremely fast twisted intramolecular charge transfer (TICT) deactivation via rotation of C—N bond, resulting in a greatly twisted configuration of the enol excited state. The nonradiative decay of this TICT geometry relaxation prevailed against the ESIPT deactivation to the keto excited state, leading to the weak luminescence of the dilute solution, which was essential to the enhanced emission of its aggregates.

Key words: twisted intramolecular charge transfer, geometry relaxation, excited state intramolecular proton transfer