Synthesis and characterization of Ag-ligand modified polyoxovanadates with three-dimensional structures

Publication date: Available online 1 October 2018Source: Journal of Solid State ChemistryAuthor(s): Xing Xin, Xuerui Tian, Heng Zhang, Yuanzhe Gao, Yuanyuan Ma, Zhangang HanAbstractTwo new coordination polymers {[Ag(bpe)]4V6O17}n (1) and {[Ag(bpe)]10V14O40}n∙3nH2O (2) (bpe = 1,2-di(4-pyridyl)ethylene) had been synthesized by hydrothermal methods, and characterized by elemental analysis, IR, UV-vis, TG, XRD and single-crystal X-ray diffraction. Structural analysis revealed that they both consist of {VO4}-based chain-like polyanions and {Ag-bpe} cationic units. The structural differences of 1–2 clearly showed that the polyoxovanadates are sensitive to the dosages of NH4VO3 source in synthesis reaction. The aromatic π…π stacking and Ag…Ag weak interactions among {Ag-bpe} cationic units contribute the significant effect on the stability of 3D crystal structures. The catalytic properties of the synthesized crystals were tested. It was found that the photochemical degradation of MB can reach 74.2% in 90 min by using 1 as catalyst.Graphical abstractTwo Ag-ligand modified vandates had been synthesized and characterized, which the inorganic moieties present chain-like {VO4}∞ arrangement consisting of four/five-membered {VO4} rings bridged by {VO4}2 subunits via oxygen-shared modes.

Source: Journal of Solid State Chemistry - October 5, 2018 Category: Chemistry Source Type: research