Synthesis and novel fluorescence phenomenon of terbium(III) complex with N, N′, N"-tris (2-benzimidazolmethyl) amine

被引：0
|
作者：
Yang, Tianlin [1 ]
Gao, Min [1 ]
Qin, Wenwu [2 ,3 ]
Yang, Jinhui [1 ]
机构：
[1] Ningxia Univ, Coll Chem & Chem Engn, Key Lab Energy Sources & Chem Engn, Yinchuan 750021, Peoples R China
[2] Lanzhou Univ, Coll Chem & Chem Engn, Key Lab Nonferrous Met Chem & Resources Utilizat, Lanzhou 730000, Peoples R China
[3] Lanzhou Univ, Coll Chem & Chem Engn, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China
来源：
INDIAN JOURNAL OF CHEMISTRY SECTION A-INORGANIC BIO-INORGANIC PHYSICAL THEORETICAL & ANALYTICAL CHEMISTRY | 2010年 / 49卷 / 01期
关键词：
Coordination chemistry; Fluorescence; Luminescence; Terbium; Benzimidazoles; EUROPIUM(III); LUMINESCENCE; SENSORS;
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A benzimidazole ligand with a tripodal structure, N, N', N ''-tris (2-benzimidazolmethyl) an-Line, and its terbium (III) complex has been synthesized. The complex has been characterized by element analysis, IR spectra, mass spectra, thermal analysis and molar conductivity. The terbium ion is found to coordinate with the nitrogen atoms (=N-) of imidazole ring and the bridgehead nitrogen atom. The fluorescence properties of the complex in aqueous solutions have been studied. Under excitation of UV light, the complex exhibits characteristic fluorescence of terbium ion. The luminescence of terbium complex in aqueous solutions is strongly enhanced by H(+) concentration. This phenomenon makes the new complex favorable for use in fluorescence switches and sensors. The mechanism of the fluorescence enhancement by protonation of the nitrogen atoms (-NH-) of imidazole ring is due to the suppressed photoinduced electron transfer fluorescence quenching on addition of acid.
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页码：45 / 48
页数：4
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