Construction of Co(II), Cu(II), and Zn(II) coordination compounds driven by a pyridine-dicarboxylic acid: Hydrothermal assembly, structural and topological versatility, and catalytic properties

IF 2.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Polyhedron Pub Date : 2024-09-16 DOI:10.1016/j.poly.2024.117228

Zhenzhong Mei , Hongyu Wang , Xiuqi Kang , Jinzhong Gu , Mohammad Azam

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Abstract

A derivative of pyridine-dicarboxylic acid, 5-(3-carboxyphenyl)picolinic acid (H₂cpic), was used as a versatile building block to synthesize a series of five novel coordination compounds under hydrothermal conditions and formulated as {[Cu₂(μ-cpic)₂₍phen)]·H₂O}_n (1), [Co(μ-cpic)(phen)(H₂O)]_n (2), [Cu₂(μ-cpic)₂(2,2′-bipy)(H₂O)₂]·2H₂O (3), {[Cu₃(μ-cpic)₃(μ-4,4′-bipy)_1.5(H₂O)₃]·2H₂O}_n (4), and {[Zn₂(μ-cpic)₂(μ-dpe)_0.5(H₂O)₃]·H₂O}_n (5). The auxiliary ligands used in the synthesis were 1,10-phenanthroline (phen), 2,2′-bipyridine (2,2′-bipy), 4,4′-bipyridine (4,4′-bipy), and 1,2-di(4-pyridyl)ethylene (dpe). The structures of the compounds 1–5 vary significantly, ranging from a 0D tetramer (3) to 1D metal–organic chains (1, 2, 4, and 5). Furthermore, these compounds were evaluated as heterogeneous catalysts for the Henry reaction, achieving high product yields under optimized conditions. We further investigated various reaction parameters, and substrate scope, and assessed the feasibility of catalyst recycling. This thorough investigation highlights the versatility of H₂cpic as a dicarboxylate building block in the formation of functional coordination polymers.

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构建由吡啶二羧酸驱动的 Co(II)、Cu(II) 和 Zn(II) 配位化合物：水热组装、结构和拓扑多样性以及催化特性

以吡啶二羧酸的衍生物--5-(3-羧基苯基)吡啶甲酸（H2cpic）为通用构件，在水热条件下合成了一系列五种新型配位化合物，并配制成{[Cu2(μ-cpic)2(phen)]-H2O}n (1)、[Co(μ-cpic)(phen)(H2O)]n（2）、[Cu2(μ-cpic)2(2,2′-bipy)(H2O)2]-2H2O（3）、{[Cu3(μ-cpic)3(μ-4,4′-bipy)1.5(H2O)3]-2H2O}n (4)，以及{[Zn2(μ-cpic)2(μ-dpe)0.5(H2O)3]-H2O}n (5)。合成中使用的辅助配体是 1,10-菲罗啉（phen）、2,2′-联吡啶（2,2′-bipy）、4,4′-联吡啶（4,4′-bipy）和 1,2-二（4-吡啶基）乙烯（dpe）。1-5 种化合物的结构差异很大，从 0D 四聚体（3）到 1D 金属有机链（1、2、4 和 5）不等。此外，我们还对这些化合物作为亨利反应的异相催化剂进行了评估，在优化条件下获得了较高的产物产率。我们进一步研究了各种反应参数和底物范围，并评估了催化剂回收利用的可行性。这项深入研究凸显了 H2cpic 作为二羧酸构筑基块在形成功能配位聚合物方面的多功能性。

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来源期刊

Polyhedron 化学-晶体学

CiteScore

4.90

自引率

7.70%

发文量

515

审稿时长

2 months

期刊介绍： Polyhedron publishes original, fundamental, experimental and theoretical work of the highest quality in all the major areas of inorganic chemistry. This includes synthetic chemistry, coordination chemistry, organometallic chemistry, bioinorganic chemistry, and solid-state and materials chemistry. Papers should be significant pieces of work, and all new compounds must be appropriately characterized. The inclusion of single-crystal X-ray structural data is strongly encouraged, but papers reporting only the X-ray structure determination of a single compound will usually not be considered. Papers on solid-state or materials chemistry will be expected to have a significant molecular chemistry component (such as the synthesis and characterization of the molecular precursors and/or a systematic study of the use of different precursors or reaction conditions) or demonstrate a cutting-edge application (for example inorganic materials for energy applications). Papers dealing only with stability constants are not considered.