A Selective Metal-Ligand Fluorescent Chemosensor for Dihydrogen Phosphate via Intermolecular Excimer Formation in Water

被引:28
作者
Huang, Xiao-huan [1 ]
He, Yong-bing [1 ]
Hu, Chen-guang [1 ]
Chen, Zhi-hong [1 ]
机构
[1] Wuhan Univ, Dept Chem, Wuhan 430072, Peoples R China
基金
中国国家自然科学基金;
关键词
Anions; Receptors; Fluorescence; Sensors; Chemosensors; Supramolecular chemistry; PHOTOINDUCED ELECTRON-TRANSFER; AQUEOUS-SOLUTION; IMIDAZOLIUM RECEPTORS; MOLECULAR RECOGNITION; ANION RECOGNITION; BIS-CARBOXYLATES; ZINC(II) COMPLEX; PHYSIOLOGICAL PH; UNIQUE EXCIMER; PYROPHOSPHATE;
D O I
10.1002/ejoc.200801077
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
Two new anthrylpolyamine ligands and their zinc complexes 1.2Zn and 2.Zn have been synthesized. The recognition ability of 1.2Zn and 2.Zn towards inorganic anions was studied by fluorescence spectroscopy in water at physiological pH values. The receptor 1.2Zn displays an excellent selective fluorescent enhancement of the excimer emissive peak with H2PO4_ that is absent with other inorganic anions such as SO42-, NO3-, HCO3-, AcO-, F-, Cl-, Br- and I-. The obvious excimer formation can be explained by 2+2-type binding between 1.2Zn and H2PO4-, which was confirmed by electrospray ionization data. The sensitive fluorescent response and excellent selectivity show that receptor 1.2Zn can be used as a fluorescent chemosensor for the H2PO4- anion under physiological pH conditions. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451. Weinheim, Germany, 2009)
引用
收藏
页码:1549 / 1553
页数:5
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