Synthesis and characterization of self-assembled coordination polymers of N-diaminomethylene-4-(3-formyl-4-hydroxy-phenylazo)-benzenesulfonamide
Synthesis and characterization of self-assembled coordination polymers of N-diaminomethylene-4-(3-formyl-4-hydroxy-phenylazo)-benzenesulfonamide
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DOI：
10.1080/00958972.2012.661418
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发表时间：
2012-01-01
影响因子：
1.9
通讯作者：
Issa, Raafat
中科院分区：
文献类型：
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作者：
El-Ghamry, Hoda;Sakai, Ken;Issa, Raafat
合成了偶氮染料配体N-diaminomethylene-4-(3-formyl-4-hydroxy-phenylazo)-benzenesulfonamide(HL)和铜(II)、钴(II)、锰(II)的配位聚合物以及非聚合的Pd(II)配合物。在所有的络合物中，配体通过甲酰基和α-羟基氧原子与金属离子键合。磺胺氧也与金属配位。配合物的分子式为[ML2](N)，其中M=铜(II)、钴(II)和锰(II)，以及[ML(Cl)(H2O)]，其中M=Pd(II)。在光谱研究和磁化率测量的基础上，确定了Co(II)和Mn(II)配合物为八面体构型，而Pd(II)配合物为正方形平面构型。从DMF中结晶得到了通式为{[Cu(L)(2)]中心点3DMF}(N)(2)的单晶。2的X-射线结构分析表明，每个铜(II)都采用拉长的八面体几何构型，提供了一维链。链之间通过氢键连接，形成二维超分子组装。并对HL的晶体结构进行了测定和讨论。还讨论了该配体和某些配合物的循环伏安行为。
The azo dye ligand N-diaminomethylene-4-(3-formyl-4-hydroxy-phenylazo)-benzenesulfonamide (HL) and Cu(II), Co(II), and Mn(II) coordination polymers were synthesized in addition to a non-polymeric Pd(II) complex. In all complexes, the ligand bonds to the metal ion through the formyl and alpha-hydroxy oxygen atoms. The sulfonamide oxygen also coordinates to the metal. The complexes are formulated as [ML2](n), where M = Cu(II), Co(II), and Mn(II), and [ML(Cl)(H2O)], where M = Pd(II). On the basis of spectral studies and magnetic susceptibility measurements, an octahedral geometry was assigned to Co(II) and Mn(II) complexes, tetragonally elongated octahedral geometry for Cu(II) complex, while the Pd(II) complex was found to be square planar. Crystallization of Cu(II) complex from DMF afforded single crystals of general formula {[Cu(L)(2)] center dot 3DMF}(n) (2). X-ray structural analysis of 2 revealed that each Cu(II) adopts elongated octahedral geometry affording 1-D chains. The chains are connected by hydrogen bonds, resulting in the formation of 2-D supramolecular assemblies. The crystal structure of HL has also been determined and discussed. Cyclic voltammetric behavior of the ligand and some complexes are also discussed.