3-(3-吡啶)丙烯酸配体杂化的Keggin型多酸基超分子化合物的合成、结构及光催化性能  

Synthesis,Structure and Photocatalytic Properties of a Keggin-Type Polyoxometalate-Based Supramolecular Complex Hybridized by 3-Pyridineacrylic Acid Ligand

作　　者：孙佳馨 李爽[1] 李晓慧 史思柳 刘宝慧 齐嘉慧 李嘉琦 张众 SUN Jiaxin;LI Shuang;LI Xiaohui;SHI Siliu;LIU Baohui;QI Jiahui;LI Jiaqi;ZHANG Zhong(Professional Technology Innovation Center of Liaoning Province for Conversion Materials of Solar Cell,College of Chemistry and Materials Engineering,Bohai University,Jinzhou 121013,China)

机构地区：[1]渤海大学化学与材料工程学院,辽宁省全谱太阳能电池转光材料专业技术创新中心,锦州121013

出　　处：《人工晶体学报》2023年第8期1485-1490,共6页Journal of Synthetic Crystals

基　　金：国家自然科学基金青年科学基金(21901018,22201021);辽宁省自然科学基金面上项目(2022-MS-373);省级大学生创新创业训练计划(S202210167041)。

摘　　要：本文在水热条件下成功合成了一例Keggin型多酸基超分子化合物1,其分子式为H_(3)[(3-PA)4(PW_(12)O_(40))](3-PA=3-(3-吡啶)丙烯酸),并通过单晶X射线衍射、元素分析(EA)、红外(IR)光谱、X射线粉末衍射(PXRD)、热重(TG)和固体紫外-可见(UV-Vis)漫反射对化合物1的结构进行了表征。化合物1属于三斜晶系,P-1空间群,a=1.20033(3)nm,b=1.21642(3)nm,c=1.42466(4)nm,α=75.030(1)°,β=73.452(1)°,γ=69.372(1)°,V=1.83700(8)nm^(3),Z=1,M r=3476.78,F(000)=1538,μ=18.815 mm^(-1),D c=3.143 mg·m^(-3),S=1.062,R 1=0.0462,wR 2=0.1387。化合物1的结构单元包含一个[PW_(12)O_(40)]^(3-)多阴离子和四个3-PA配体,并通过[PW_(12)O_(40)]^(3-)多阴离子和3-PA配体之间的氢键连接形成二维超分子层。化合物1在光催化还原Cr(Ⅵ)反应中展现出良好的光催化活性,并具有较好的结构稳定性和可循环利用性。A new Keggin-type polyoxometalate-based supramolecular complex 1,namely H_(3)[(3-PA)4(PW_(12)O_(40))](3-PA=3-Pyridineacrylic acid),was successfully synthesized under hydrothermal conditions and structurally characterized by single crystal X-ray diffraction,elemental analysis(EA),IR spectra,PXRD,TG and UV-Vis diffuse-reflectance.Complex 1 crystallizes in the triclinic system,P-1 space group with a=1.20033(3)nm,b=1.21642(3)nm,c=1.42466(4)nm,α=75.030(1)°,β=73.452(1)°,γ=69.372(1)°,V=1.83700(8)nm^(3),Z=1,M r=3476.78,F(000)=1538,μ=18.815 mm^(-1),D c=3.143 mg·m^(-3),S=1.062,R 1=0.0462,wR 2=0.1387.The structural unit of complex 1 consists of a[PW_(12)O_(40)]^(3-)ployanion and four 3-PA ligands.In addition,[PW_(12)O_(40)]^(3-)polyanion and 3-PA ligands are linked by H-bonds to form 2-D supramolecular layer.When using as photocatalyst,complex 1 displayed excellent photocatalytic activity towards the reduction of Cr(Ⅵ)with good structural stability and recyclability.

关 键 词：多金属氧酸盐 水热合成 超分子化合物 光催化 CR(VI)还原 

分 类 号：O611[理学—无机化学]