首页|Metal-directed two new Anderson-type polyoxometalate-based metal-organic complexes with different electrocatalytic sensing performance
Metal-directed two new Anderson-type polyoxometalate-based metal-organic complexes with different electrocatalytic sensing performance
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NSTL
Elsevier
Two new Anderson-type polyoxometalate (POM)-based metal-organic complexes, namely: H[Cd(L) (CrMo6(OH)(6)O-18)].2H(2)O (1) and H[Co(L)(CrMo6(OH)(6)O-18)(H2O)(2)].3H(2)O (2) (L = N, N'-bis(3-pyridinecarbox-amide)-1,4 cyclohexane) have been successfully synthesized under hydrothermal condition and characterized in detail. For 1, the [CrMo6(OH)(6)O-18](3)-anion adopts hexadentate coordination pattern connecting with binuclear Cd-2(II) unit to form a two-dimensional (2D) layer, which is further expanded into a three-dimensional framework by the L ligands. In 2, The CrMo6 anions exhibit tetradentate coordination mode to connect the metal ions constructing a 2D layer. The L ligand does not play a linkage role and only suspend on the 2D network, which is different from complex 1. The influence of central metal ions on the architectures was discussed. The electro-catalytic reduction of potassium bromate and the electrocatalytic oxidation of ascorbic acid by complexes 1 and 2 were investigated. These title complexes could be regarded as amperometric sensors for the detection of potassium bromate and ascorbic acid. In particular, complex 1 shows the lowest detection limit for these two substances, suggesting its better electrochemical performance.
NSTL
Elsevier
