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Acta Chimica Sinica ›› 2009, Vol. 67 ›› Issue (13): 1481-1486. Previous Articles     Next Articles

Original Articles

羧脒盐桥介导的萘-二苯酮单重态能量传递研究

韩 镭a,b 李迎迎a 曾 毅a,b 陈金平*,a 李 嫕*,a

  

  1. (a光化学转换与功能材料重点实验室 中国科学院理化技术研究所 北京 100190)
    (b中国科学院研究生院 北京 100039)

  • 投稿日期:2009-04-30 修回日期:2009-05-25 发布日期:2009-07-14
  • 通讯作者: 李嫕

Singlet-Singlet Energy Transfer through an Amidinium-Carboxylate Salt Bridge Interface in Naphthalene-Benzophenone Dyads

Han, Lei a,b Li, Yingying a Zeng, Yi a,b Chen, Jinping *,a Li, Yi *,a   

  1. (a Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190)
    (b Graduate School, Chinese Academy of Sciences, Beijing 100039)
  • Received:2009-04-30 Revised:2009-05-25 Published:2009-07-14
  • Contact: Li, Yi

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The amidinium-carboxylate salt bridge systems bearing a pair of energy transfer donor (naphthalene, NA) and acceptor (benzophenone, BP), NA-(amidinium-carboxylate)-BP and NA-(carboxlate- amidinium)-BP, were constructed. Steady state and time-resolved fluorescence studies demonstrate that the singlet-singlet energy transfer from NA to BP can occur efficiently with efficiencies of 0.998, 0.970 and rate constants of 6.8×1010 and 1.5×1010 s―1 for NA-(amidinium-carboxylate)-BP (NA-Am/BP-COOH＝1/1) and NA-(carboxylate-amidinium)-BP (NA-COOH/BP-Am＝1/1), respectively. We infer that the singlet-singlet energy transfer proceeds via a “through-bond” electron exchange mechanism, and the amidinium-car- boxylate salt bridge mediates the energy transfer process with directionality.

Key words: amidinium-carboxylate salt bridge, energy transfer, benzophenone, naphthalene