Abstract
A Keggin-type arsenotungstate supramolecular assembly modified with metal-organic complexes, {Zn(dpb)2}2{AsWVI11WV O40}·4H2O (1) (dpb = 2,6-di(2-pyridine)-4,4′-bipyridine), have been synthesized under hydrothermal condition and fully characterized by routine method. In compound 1, each {AsW12O40} cluster is attached to eight Zn(dpb)2 complexes, which are further attracted by four Keggin analogues, forming a tightly packed three-dimensional supramolecular network through strong H-bonds and π-π interactions. It is worth noting that the dpb ligand in the complex {Zn(dpb)2} is produced from the ptz and dpp precursor via under hydrothermal conditions for the first time and its possible assembly path is discussed. The stacking pattern of compound 1 can be simplified to 4,8-connected network with topology {410·610·88}{45·6}2. Compound 1 modified glassy carbon electrode (1-GCE) exhibits significant electrocatalytic reduction activity and outstanding sensing performance for H2O2 with low detection limit (0.43 μM) and wide linear range (1.28 μM-2.23 mM). Meanwhile, it has high efficiency photocatalytic degradation performance for refractory dyes under ultraviolet irradiation.
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