This study concentrates on the spectral and complexing properties of a tetraoxycalix[2]arene[2]triazine derivative bearing two bipyridines （Calix-BIPY2） in a mixture of acetonitrile ： chloroform （4 ： 1, V： V）. ...This study concentrates on the spectral and complexing properties of a tetraoxycalix[2]arene[2]triazine derivative bearing two bipyridines （Calix-BIPY2） in a mixture of acetonitrile ： chloroform （4 ： 1, V： V）. The results show that Calix-BIPY2 has a highly selectivity and sensitivity towards Zn2＋ over various competing eations （K＋, Cu2＋, Cd2＋, Co2＋, Fe2＋, Hg2＋, Ag＋, Al3＋ and pb2＋）. The complexation of Zn2＋ induces a remarkable fluorescence enhancement due to combination effects of the binding strength, electron spins state of metal ions, photoinduced charge transfer （PCT） and the rigidity of the complexing unit offered by calixarene-based hosts.展开更多
基金Supporting information for this article is available on the WWW under http：//dx.doi.org/10.1002/cjoc.201200057 or from the author.Acknowledgement This Research was supported by the National Natural Science Foundation of China, the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry, the President Fund of Graduate University of Chinese Academy of Sciences. The authors are grateful to Prof. Mei-Xiang Wang from Tsinghua University and Prof. Shu Wang from Institute of Chemistry of CAS for their great helps or fruitful discussions on this project.
文摘This study concentrates on the spectral and complexing properties of a tetraoxycalix[2]arene[2]triazine derivative bearing two bipyridines （Calix-BIPY2） in a mixture of acetonitrile ： chloroform （4 ： 1, V： V）. The results show that Calix-BIPY2 has a highly selectivity and sensitivity towards Zn2＋ over various competing eations （K＋, Cu2＋, Cd2＋, Co2＋, Fe2＋, Hg2＋, Ag＋, Al3＋ and pb2＋）. The complexation of Zn2＋ induces a remarkable fluorescence enhancement due to combination effects of the binding strength, electron spins state of metal ions, photoinduced charge transfer （PCT） and the rigidity of the complexing unit offered by calixarene-based hosts.
