Preparation and electrochemical sensing performances toward bromate and Cr(VI) of two γ-octamolybdate-based complexes decorated by in situ transformation ligand

IF 1.6 4区化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR Transition Metal Chemistry Pub Date : 2022-09-18 DOI:10.1007/s11243-022-00512-9

Ling-jie Zhang, Xiang Wang, Pei-ze Yang, Na Tong

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Abstract

Two octamolybdate-based complexes formulated by [M₂(H₂O)₄(γ-Mo₈O₂₆)(HDIBA)₂]·H₂O [M = Co (1), Zn (2), DIBA = 3,5-di(1H-imidazol-1-yl)benzoic acid], were synthesized successfully by using hydrothermal method in the presence of 3,5-di(1H-imidazol-1-yl) benzonitrile (DICN) as initial ligand. The DIBA ligand was generated in situ from the hydrolysis of DICN ligand. The γ-octamolybdate polyoxoanion was decorated by two DIBA ligands relying on Mo−O covalent bonds between the carboxyl oxygen atom of DIBA ligand and Mo atom of polyoxoanion. The transition metal centers joined in pairs these modified γ-octamolybdate polyoxoanions into a 1D chain, which were further aggregated to result in a 2D layer. The investigations on the electrochemical performances indicated that the two complexes displayed electrocatalytic and electrochemical sensing activities for bromate and Cr(VI), which provide potential electrode materials in preparing the electrochemical sensors and electrocatalysts.

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原位转化配体修饰的两种γ-八胺酸基配合物的制备及其对溴酸盐和Cr(VI)的电化学传感性能

以[M2(H2O)4(γ-Mo8O26)(HDIBA)2]·H2O [M = Co (1)， Zn (2)， DIBA = 3,5-二(1h -咪唑-1-基)苯甲酸]为初始配体，用水热合成法成功合成了两种八胺酸盐基配合物。DIBA配体是由DICN配体水解原位生成的。利用DIBA配体的羧基氧原子与多氧阴离子Mo原子之间的Mo−O共价键，用两个DIBA配体修饰γ-八胺酸多氧阴离子。过渡金属中心将这些修饰的γ-八胺酸多氧阴离子成对连接成一维链，并进一步聚集形成二维层。电化学性能研究表明，这两种配合物对溴酸盐和Cr(VI)具有电催化和电化学传感活性，为制备电化学传感器和电催化剂提供了潜在的电极材料。

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来源期刊

Transition Metal Chemistry 化学-无机化学与核化学

CiteScore

3.60

自引率

0.00%

发文量

审稿时长

1.3 months

期刊介绍： Transition Metal Chemistry is an international journal designed to deal with all aspects of the subject embodied in the title: the preparation of transition metal-based molecular compounds of all kinds (including complexes of the Group 12 elements), their structural, physical, kinetic, catalytic and biological properties, their use in chemical synthesis as well as their application in the widest context, their role in naturally occurring systems etc. Manuscripts submitted to the journal should be of broad appeal to the readership and for this reason, papers which are confined to more specialised studies such as the measurement of solution phase equilibria or thermal decomposition studies, or papers which include extensive material on f-block elements, or papers dealing with non-molecular materials, will not normally be considered for publication. Work describing new ligands or coordination geometries must provide sufficient evidence for the confident assignment of structural formulae; this will usually take the form of one or more X-ray crystal structures.