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Chemical Research in Chinese Universities ›› 2011, Vol. 27 ›› Issue (1): 127-131.

• Articles • Previous Articles     Next Articles

Terpyridine-derived Zn2+ Selective Fluorescence Sensor: Ratiometric Fluoroionophoric Behavior Study

SONG Peng1, SUN Shi-guo2, ZHOU Pan-wang1, LIU Jian-yong1*, XU Yong-qian2 and PENG Xiao-jun2   

  1. 1. State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China;
    2. State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116012, P. R. China
  • Received:2010-01-21 Revised:2010-03-24 Online:2011-01-25 Published:2011-01-04
  • Contact: LIU Jian-yong E-mail:beam@dicp.ac.cn
  • Supported by:

    Supported by the National Natural Science Foundation of China(Nos.20633070, 20833008) and the National Key Basic Research Special Foundation of China(Nos.2007CB815202).

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Abstract:

A sensitive and selective zinc ion ratiometric fluorescence sensor has been synthesized and characterized. This material displays dual fluorescence. After the material was bonded to a closed-shell metal ion, such as Zn2+, the recovery of the local excited fluorescence of the material-Zn2+ complex, largely at the expense of the intramolecular charge transfer fluorescence, is consistent with the difference between selected orbital transitions of the free dye and the metal-chelated complex. For instance, the contribution of the πtpy→πtpy* transition becomes more prominent. This is also consistent with the results of the fluorescence decay behavior, measured via a time-correlated single photon counting setup. In contrast, the corresponding open shell Ni2+-bound complex quenches both kinds of photoluminescence, due to spin-orbit coupling.

Key words: Terpyridine, Fluorescence sensor, Ratiometric fluoroionophoric behavior, Time-correlated single photon counting