羧脒盐桥介导的单重态能量传递直接观察

doi:10.7517/j.issn.1674-0475.2009.06.427

影像科学与光化学 ›› 2009, Vol. 27 ›› Issue (6): 427-434.DOI: 10.7517/j.issn.1674-0475.2009.06.427

羧脒盐桥介导的单重态能量传递直接观察

韩镭^1,2, 李迎迎¹, 陈金平¹, 李嫕¹

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

收稿日期:2009-05-11 修回日期:2009-05-27 出版日期:2009-11-23 发布日期:2009-11-23
通讯作者: 李嫕,E-mail: yili@ mail.ipc.ac.cn;陈金平,E-mail: chen-jp@mail.ipc.ac.cn.
基金资助:
国家自然科学基金(20603042,20733007,20772134);科技部国家重点基础研究发展规划项目(2007CB808004)

Direct Observation of Singlet-Singlet Energy Transfer Mediated by an Amidinium Carboxylate Salt Bridge

HAN Lei^1,2, LI Ying-ying¹, CHEN Jin-ping¹, LI Yi¹

1. Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China;
2. Graduate University of Chinese Academy of Sciences, Beijing 100049, P. R. China

Received:2009-05-11 Revised:2009-05-27 Online:2009-11-23 Published:2009-11-23

摘要/Abstract

摘要： 设计构建了以羧脒盐桥联接的萘和蒽超分子组装体系,NA-(脒基-羧基)-An以及相应的模型体系.稳态和时间分辨荧光光谱研究表明,置于羧脒盐桥两端的萘和蒽基团之间发生了从萘到蒽的单重态能量传递,NA-(脒-羧)-An超分子体系中单重态能量传递效率和速率常数分别大于0.99和9.9×10⁹s^-1.推测羧脒盐桥介导了体系中的单重态能量传递过程,单重态能量传递‘通过键’以电子交换机制进行.

关键词: 羧脒盐桥, 能量传递, 萘, 蒽

Abstract: The Amidinium-Carboxylate salt bridge system bearing a pair of singlet energy transfer donor (naphthalene,NA) and acceptor (anthracene,An),NA-(amidinium-carboxylate)-An was designed and assembled. Steady-state and time-resolved fluorescence studies demonstrate that the singlet-singlet energy transfer from NA to An can occur efficiently within the supramolecular system NA-(amidinium-carboxylate)-An. The efficiency and rate constant are estimated to be larger than 0.99 and 9.9×10⁹s^-1. We infer that the singlet-single energy transfer proceeds via a ‘through-bond’ electron exchange mechanism,and mediated by the amidinium-carboxylate salt bridge.

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

中图分类号:

韩镭, 李迎迎, 陈金平, 李嫕. 羧脒盐桥介导的单重态能量传递直接观察[J]. 影像科学与光化学, 2009, 27(6): 427-434.

HAN Lei, LI Ying-ying, CHEN Jin-ping, LI Yi. Direct Observation of Singlet-Singlet Energy Transfer Mediated by an Amidinium Carboxylate Salt Bridge[J]. Imaging Science and Photochemistry, 2009, 27(6): 427-434.

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羧脒盐桥介导的单重态能量传递直接观察

Direct Observation of Singlet-Singlet Energy Transfer Mediated by an Amidinium Carboxylate Salt Bridge

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