Sun Yanwen, Chen Zhen, Wang Xiaozhong, Wang Lei, Yang Xue, Liang Xiaoting, Fan Shuangshuang, Zhang Peiran
School of Chemistry and Chemical Engineering, Hebei Normal University For Nationalities, Higher Education Park, Chengde 067000, People's Republic of China.
Acta Crystallogr C Struct Chem. 2021 Jun 1;77(Pt 6):291-298. doi: 10.1107/S2053229621005143. Epub 2021 May 26.
Multidentate carboxylate ligands have been widely used in the construction of metal-organic frameworks (MOFs) owing to the rich variety of their coordination modes, which can lead to crystalline products with interesting structures and properties. Two new main-group MOFs, namely, poly[[di-μ-aqua-diaqua(dimethylformamide)[μ-5,5'-methylenebis(2,4,6-trimethylbenzene-1,3-dicarboxylato)]dibarium(II)] trihydrate], {[Ba(CHO)(CHNO)(HO)]·3HO} or {[Ba(BTMIPA)(DMF)(HO)]·3HO} (1), and poly[[diaqua[μ-5,5'-methylenebis(2,4,6-trimethylbenzene-1,3-dicarboxylato)]dilead(II)] 2.5-hydrate], {[Pb(CHO)(HO)]·2.5HO} or {[Pb(BTMIPA)(HO)]·2.5HO} (2), were prepared by the self-assembly of metal salts with the semi-rigid tetracarboxylic acid ligand 5,5'-methylenebis(2,4,6-trimethylisophthalic acid) (HBTMIPA). Both structures were characterized by elemental analysis (EA), single-crystal X-ray diffraction, powder X-ray diffraction (PXRD), IR spectroscopy and thermogravimetric analysis (TGA). Complex 1 reveals a three-dimensional (3D) flu network formed via bridging tetranuclear secondary building units (SBUs) and complex 2 displays a 3D framework with an sqp topology based on one-dimensional metal chains. The BTMIPA ligands adopt a rare coordination mode in 2, although the ligands in both 1 and 2 are X-shaped. The luminescence properties of both complexes were investigated in the solid state.
多齿羧酸盐配体因其丰富多样的配位模式而被广泛应用于金属有机框架（MOF）的构建中，这能够产生具有有趣结构和性质的晶体产物。通过金属盐与半刚性四羧酸配体5,5'-亚甲基双（2,4,6-三甲基间苯二甲酸）（HBTMIPA）的自组装，制备了两种新型主族MOF，即聚[[二-μ-水-二水（二甲基甲酰胺）[μ-5,5'-亚甲基双（2,4,6-三甲基苯-1,3-二羧酸根）]二钡（II）]三水合物]，{[Ba(CHO)(CHNO)(HO)]·3HO}或{[Ba(BTMIPA)(DMF)(HO)]·3HO}（1），以及聚[[二水[μ-5,5'-亚甲基双（2,4,6-三甲基苯-1,3-二羧酸根）]二铅（II）]2.5水合物]，{[Pb(CHO)(HO)]·2.5HO}或{[Pb(BTMIPA)(HO)]·2.5HO}（2）。两种结构均通过元素分析（EA）、单晶X射线衍射、粉末X射线衍射（PXRD）、红外光谱和热重分析（TGA）进行了表征。配合物1通过桥连四核二级构筑单元（SBU）形成三维（3D）flu网络，配合物2基于一维金属链展示出具有sqp拓扑结构的3D框架。尽管1和2中的配体均为X形，但BTMIPA配体在2中采用了罕见的配位模式。对两种配合物的固态发光性质进行了研究。
