苯并三氮唑、Cr(Ⅲ)和磷钨酸构成的无机-有机杂化化合物的合成与性质

Preparation,characterization and electrochemical investigation of a new inorganice-organic hybrid material based on Dawson-type polyoxometalate and benzotriazole molecules

合成了一种无机-有机杂化多酸化合物[Cr(H2O)6][BTA]3[P2W18O62]·12H2O(BTA=苯并三氮唑).采用X射线单晶衍射、元素分析、红外光谱、热重分析和XRD分析对该晶体的结构进行了表征.结果表明:该晶体属于六方晶系,P-62c空间群;晶胞参数a=1.674 36(5)nm,b=1.674 36(5)nm,c=3.121 55(14)nm,γ=120(10)°,V=7.578 8(5)nm3,Z=1,F(000)=5 543.43,R1=0.052 4,wR2=0.096 5.在该晶体结构中,带负电荷的多阴离子簇、质子化的苯并三氮唑分子、Cr3+和水分子在分子中交替排列.电化学实验证明,该化合物对NO-2具有良好的电催化性质.

A new polyoxometalate crystal [Cr （H2O）6 ] [BTA]3 [P2W18O62 ] · 12H2O （BTA = benzotriazole） has been synthesized characterized by single crystal X-ray diffraction, IR spectra, and Thermogravimetric analysis （TGA）. Crystal data： space group P-62c, a = 1. 674 36 （5） nm, b = 1. 674 36（5） nm,c=3. 121 55（14） nm,y=120（10）°,V：7. 578 8（5） nma ,Z=1,F（000）=5 543.43, R1 =0.052 4,wR2 = 0. 096 5. The electrochemical properties of this crystal in aqueous solution are studied at room temperature. It was found that this compound presents good electrocatalytic activities for the reduction of NO2-.