Key Laboratory of Polyoxometalate Science of Ministry of Education, Department of Chemistry, Northeast Normal University, Renmin Street No. 5268, Changchun, Jilin 130024, P. R. China.
Dalton Trans. 2013 Dec 21;42(47):16602-7. doi: 10.1039/c3dt51722e.
Two new porous frameworks [Ni(bix)2][VW12O40]·(H2bix)·H2O (1) and [Co(bix)2][VW12O40]·(H2bix)·2H2O (2) (bix = 1,4-bis(imidazol-1-ylmethyl)-benzene) composed of Keggin polyoxometalates (POMs) and metal-organic coordination polymer sheets have been successfully obtained, and characterized by elemental analysis, IR spectra, thermal gravimetric analysis, and single crystal X-ray diffraction. Structural analysis reveals that the 2D metal-organic coordination polymer sheets in the two compounds are constructed from the transition-metal (TM) cations and the flexible N-donor ligand bix, which are further pillared by POM clusters into the 3D porous frameworks. Powder X-ray diffraction (PXRD) patterns of 1 indicate the structural integrity of the framework in aqueous solution with a wide pH range of 1 to 11, and in common organic solvents (methanol, ethanol and DMF). Photocatalytic studies indicate that compounds 1 and 2 are not only active photocatalysts for degradation of rhodamine B (RB), but very stable and easily separated from the photocatalytic system for reuse as well.
两个新的多孔骨架[Ni(bix)2][VW12O40]·(H2bix)·H2O（1）和[Co(bix)2][VW12O40]·(H2bix)·2H2O（2）（bix = 1,4-双（咪唑-1-基甲基）-苯）由多酸（POMs）和金属-有机配位聚合物片组成，已成功获得，并通过元素分析、红外光谱、热重分析和单晶 X 射线衍射进行了表征。结构分析表明，两种化合物中的二维金属-有机配位聚合物片由过渡金属（TM）阳离子和柔性 N-供体配体 bix 组成，进一步被 POM 簇柱撑成 3D 多孔骨架。1 的粉末 X 射线衍射（PXRD）图谱表明，该骨架在 pH 值为 1 至 11 的宽范围内的水溶液中以及在常见有机溶剂（甲醇、乙醇和 DMF）中具有结构完整性。光催化研究表明，化合物 1 和 2 不仅是罗丹明 B（RB）降解的活性光催化剂，而且非常稳定，并且易于从光催化体系中分离出来以重复使用。
