基于原位配体反应的锰(Ⅱ)配位聚合物的合成、结构和催化性质

Synthesis,Structure and Catalytic Properties of Mn(Ⅱ)Coordination Polymer through in Situ Ligand Reaction

采用水热方法,选用含2个氰基的醚氧桥联羧酸配体(Hdbna)和2,2′-联吡啶(2,2′-bipy)与MnCl2·4H2O反应,合成了一个二维配位聚合物[Mn(μ3-Hdpna)(2,2′-bipy)]n (1),并对其结构和催化性质进行了研究。在配合物1中,配体Hdbna在水热反应条件下,通过原位反应被转化成醚氧桥联三羧酸配体(H3dpna)。结构分析结果表明配合物1的晶体属于三斜晶系,P■空间群。配合物1具有二维层结构。研究表明,配合物1在硅腈化反应中表现出较高的催化活性。

One 2D coordination polymer, namely [Mn(μ3-Hdpna)(2,2′-bipy)]n(1), has been constructed hydrothermally using Hdbna(Hdbna=5-(2,3-dicyanobenzoxy)nicotic acid), 2,2′-bipy(2,2′-bipy=2,2′-bipyridine), and manganese chloride at 160 ℃. Interestingly, the H3dpna(H3dpna=5-(2,3-dicarboxylphenoxy)nicotic acid) ligand was generated by in situ hydrolysis of cyano groups in Hdbna. The product was isolated as stable crystalline solid and was characterized by IR spectrum, elemental analysis, thermogravimetric analysis(TGA), and single-crystal X-ray diffraction analysis. Single-crystal X-ray diffraction analysis reveals that compound 1 crystallizes in the triclinic system, space group P■. Compound 1 discloses a 2D sheet with an hcb topology. Compound 1 was applied as an efficient heterogeneous catalyst for the cyanosilylation. CCDC: 2025016.