New metal complexes with 5-(1H-imidazol-4-ylmethyl)aminoisophthalic acid: Syntheses, structures, electrochemistry and electrocatalysis
作者:Jing Xu、Zhi Su、Man-Sheng Chen、Shui-Sheng Chen、Wei-Yin Sun
DOI:10.1016/j.ica.2009.05.048
日期:2009.8
Three new coordination polymers [Cu(HL)(H2O)]center dot H2O}(n) (1), [Ag(H2L)](n) (2), and [Co(HL)(phen)(H2O)]center dot 8H(2)O}(n) (3) [H3L = 5-(1H-imidazol-4-ylmethyl)aminoisophthalic acid, phen = 1,10-phenanthroline] have been synthesized under hydrothermal conditions. The results of X-ray diffraction analysis revealed that complex 1 displays (3, 3)-connected 2D network with (4, 8(2)) topology, while complexes 2 and 3 have infinite 1D chain structure, in which one of the two carboxylic groups of H2L-/HL2- is uncoordinated. The 2D layers of 1 or the 1D chains of 2 and 3 are further linked together by hydrogen bonds and pi-pi interactions to form 3D supramolecular frameworks. Moreover, the electrochemical properties of complexes 1 and 2 have been studied by modified glassy carbon electrodes of 1 (Cu-GCE) and 2 (Ag-GCE), and the results indicate that the Cu-GCE and Ag-GCE show one-electron redox peaks. In addition, both Cu-GCE and Ag-GCE have good electrocatalytic activities toward the reduction of H2O2 in phosphate buffer (pH 5.5) solution. (C) 2009 Elsevier B. V. All rights reserved.