Dimeric "paddle-wheel" carboxylates of copper(II): Synthesis, crystal structure and electrochemical studies
Dimeric "paddle-wheel" carboxylates of copper(II): Synthesis, crystal structure and electrochemical studies
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DOI：
10.1016/j.poly.2012.11.037
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发表时间：
2013-02-13
期刊：
影响因子：
2.6
通讯作者：
Sohail, Manzar
中科院分区：
文献类型：
--
作者：
Iqbal, Muhammad;Ahmad, Iqbal;Sohail, Manzar
帕拉取代苯乙酸钠盐与CuSO_4在水溶液中反应，再经吡啶处理，得到中心对称的双核配合物pyCu（R-C_6 H_4CH_2COO）（4）-Cupy，其中R =4-OMe（1）和4-Cl-（2）。通过X-射线单晶分析确定了配合物的结构。该复合物的框架被构建为具有四个羧酸桥的二聚体“桨轮”。顶端位置被吡啶配体占据，并且还有Cu-Cu键。化合物表现出单电子氧化还原行为，并且发现它们的峰电流随着扫描速率的平方根（nu（1/2））线性增加。整个电极过程被发现是活化加扩散控制。对两种化合物的电还原过程的形式电位（E '）、扩散系数（D）和非均相速率常数（k度）进行了评价。(C)2012爱思唯尔有限公司保留所有权利。
The reaction of the sodium salt of para substituted phenyl acetic acid with CuSO4 in water and subsequent treatment with pyridine gives binuclear centro-symmetric complexes pyCu(R-C6H4CH2COO)(4)-Cupy, where R =4-OMe (1) and 4-Cl- (2). The structures of both complexes were solved by X-ray single crystal analysis. The frame of the complexes is constructed as a dimeric 'paddle-wheel' with four carboxylate bridges. The apical position is occupied by a pyridine ligand and there is a Cu-Cu bond as well. The compounds demonstrated one-electron redox behavior and their peak currents were found to increase linearly with the square root of the sweep rate (nu(1/2)). The overall electrode processes were found to be activation plus diffusion controlled. The values of the formal potential (E'), diffusion coefficient (D) and heterogeneous rate constant (k degrees) were evaluated for the electroreduction process for both the compounds. (C) 2012 Elsevier Ltd. All rights reserved.