A new arylimido derivative of polyoxometalate (Bu4N) 2[Mo6O17(NAr)2] [Ar = 2,6-(CH 3)2C6H3]: Synthesis, structure and physicochemical properties

被引:0
|
作者
Department of Chemistry, Northeast Normal University, Changchun 130024, China [1 ]
机构
[1] Department of Chemistry, Northeast Normal University
来源
Inorg. Chim. Acta | 2006年 / 2卷 / 451-458期
基金
中国国家自然科学基金;
关键词
Arylimido derivatives; Crystal structure; Electrocatalytic reduction; N; N′-Dicyclohexylcarbodiimide; Polyoxometalates;
D O I
10.1007/11816157_55
中图分类号
学科分类号
摘要
A novel bifunctionalized arylimido derivative of hexamolybdate, (Bu 4N)2[Mo6O17(NAr)2] [Ar = 2,6-(CH3)2C6H3] (1), in which the two 2,6-dimethylaniline groups are bounded to hexamolybdate at the cis positions, was synthesized by a facile reaction of α-octamolybdate with 2,6-dimethylaniline using DCC as a dehydration agent. The existence of strong non-typical C-H⋯O hydrogen bonds plays an important role in crystal structure stabilization of compound 1. The results of fluorescence spectra show that the formation of a covalent bond between 2,6-dimethylaniline molecule and hexamolybdate could efficiently quench the fluorescence intensity of 2,6-dimethylaniline molecule, with a fluorescence quencher efficiency of 87.7%. Thermal analysis results indicate that two substituted 2,6-(CH3) 2C6H3 molecules bonding to the same cluster dissociated at different temperature, in well agreement with the different MoN bond length in compound 1. The electrochemical behavior of modified 1-CPE has been studied in detail. Compared with the conventional polyoxometalate (POM)-modified electrode, 1-CPE presents a merit of remarkable stability over 500 cycles due to the insolubility of the POM nanoparticles, which is especially important for practical applications. © 2005 Elsevier B.V. All rights reserved.
引用
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页码:451 / 458
页数:7
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