A Carboxylate-Rich Metalloligand and Its Heterometallic Coordination Polymers: Syntheses, Structures, Topologies, and Heterogeneous Catalysis

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• 作者：Sumit Srivastava ; Vijay Kumar ; Rajeev Gupta
• 刊名：Crystal Growth & Design
• 出版年：2016
• 出版时间：May 4, 2016
• 年：2016
• 卷：16
• 期：5
• 页码：2874-2886
• 全文大小：1011K
• 年卷期：0
• ISSN：1528-7505

文摘

This work reports three heterometallic coordination polymers (HCPs), namely, [{(1′)₂Zn₈Na₂(H₂O)₂₁}·20H₂O]_n (2), [{(1′)(1″)Cd₈(H₂O)₂₁}·32H₂O]_n (3), and [{(1′)₂Mn₈Na₂(H₂O)₂₇}·3H₂O]_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.