Two copper(II)-bbtz modified Keggin and β-octamolybdate compounds captured in one-pot under hydrothermal conditions

Abstract

Under hydrothermal conditions two compounds based on Keggin and β-octamolybdate, respectively, [Cu₂(bbtz)₄(SiMo₁₂O₄₀)] (1) and [Cu₂(bbtz)₄(Mo₈O₂₆)]_1/2·H₂O (2) (bbtz = 1,4-bis(1,2,4-triazol-1-ylmethyl)benzene), were synthesized in one-pot and characterized by single-crystal X-ray diffraction, elemental analyses, and IR spectroscopy. In compound 1, two adjacent wave-like Cu^II-bbtz lines are connected by SiMo₁₂ anions and bbtz to generate a ladder-like chain. Adjacent chains share the same Cu^II ions to build a three-dimensional (3-D) framework. In compound 2, the β-Mo₈ anions link Cu₃(bbtz)₂ subunits alternately to form a one-dimensional (1-D) chain. These chains connect each other through sharing Cu^II ions and a 3-D network is constructed. Moreover, we studied the electrocatalytic and photocatalytic activities of these two compounds. The results indicate that 1 and 2 show good electrocatalytic performance for the reduction of nitrite and bromate; they also exhibit photocatalytic properties for degradation of MB and RhB.

Keywords:

• Polyoxometalate
• 1,4-Bis(1,2,4-triazol-1-ylmethyl)benzene
• electrochemical properties
• photocatalytic properties