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首页> 外文期刊>Crystal growth & design >A Carboxylate-Rich Metalloligand and Its Heterometallic Coordination Polymers: Syntheses, Structures, Topologies, and Heterogeneous Catalysis
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A Carboxylate-Rich Metalloligand and Its Heterometallic Coordination Polymers: Syntheses, Structures, Topologies, and Heterogeneous Catalysis

机译:富含羧酸的金属配体及其杂金属配位聚合物:合成,结构,拓扑结构和多相催化。

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摘要

This work reports three heterometallic coordination polymers (HCPs), namely, [{(1')(2)Zn8Na2(H2O)(21)}center dot 20H(2)O](n) (2), [{(1')(1 '')Cd-8(H2O)(21)}center dot 32H(2)O] (3), and [{(1')(2)Mn8Na2(H2O)27}center dot 3H(2)O](n)(4), originated from a common Co3+ based metalloligand 1 offering eight arylcarboxylic acid groups where 1' and 1 '' respectively contribute eight and six anionic carboxylate groups. The crystal structure analyses display three-dimensional nature of all three HCPs wherein metalloligands are connected through secondary metals. Detailed topological analyses illustrate that the metalloligands function as the nodes that are connected to secondary building units (SBUs) composed of Zn2+, Cd2+, and Mn2+ ions coordinated by the arylcarboxylate groups. All three HCPs effectively function as the heterogeneous catalysts for the Lewis acid assisted Knoevenagel condensation reactions of assorted aldehydes with three different active methylene compounds.
机译:这项工作报告三种杂金属配位聚合物(HCPs),即[{(1')(2)Zn8Na2(H2O)(21)}中心点20H(2)O](n)(2),[{(1' )(1'')Cd-8(H2O)(21)}中心点32H(2)O](3)和[{(1')(2)Mn8Na2(H2O)27}中心点3H(2) O](n)(4)源自常见的基于Co3 +的金属配体1,该金属配体1提供八个芳基羧酸基团,其中1'和1''分别贡献了八个和六个阴离子羧酸酯基团。晶体结构分析显示了所有三个HCP的三维性质,其中金属配体通过仲金属连接。详细的拓扑分析表明,金属配体起着与由羧基羧酸芳基配位的Zn2 +,Cd2 +和Mn2 +离子组成的二级建筑单元(SBU)连接的作用。所有三种HCP均有效地充当各种醛与三种不同活性亚甲基化合物的路易斯酸辅助的Knoevenagel缩合反应的非均相催化剂。

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