Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/7190
Title: Synthesis and novel fluorescence phenomenon of terbium(III) complex with N, N′, N″-tris (2-benzimidazolmethyl) amine
Authors: Yang, Tianlin
Gao, Min
Qin, Wenwu
Yang, Jinhui
Keywords: Coordination chemistry
Fluorescence
Luminescence
Terbium
Benzimidazoles
Issue Date: Jan-2010
Publisher: CSIR
Series/Report no.:  Int. Cl.9 C07B5/00; C09K11/77
Abstract: A benzimidazole ligand with a tripodal structure, N, N′, N″-tris (2-benzimidazolmethyl) amine, 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.
Description: 45-48
URI: http://hdl.handle.net/123456789/7190
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.49A(01) [January 2010]

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