Synthesis and Characterization of a Two-dimensional Manganese Coordination Polymer

Abstract

Slow evaporation of the reaction mixture of ligand 2-(1H-imidazol-1-yl)acetic acid (Hiaa), 2,2′-bipyridine, NaOH, and Mn(ClO4)2•6H2O in water/ethanol affords a complex {[Mn(iaa)(2,2′-bipyridine)(H2O)](ClO4)}n (1). Single crystal structure determination reveals that 1 is a novel two-dimensional dinuclear manganese coordination polymer. The local coordination environment around manganese ions is a distorted octahedron. Every manganese ion coordinates with three ligands, while each ligand acts as a bridge linking three Mn ions. Magnetic studies suggest a weak antiferromagnetic coupling interaction between two Mn(II) ions. CCDC: 668269.

本文用2-咪唑乙酸(Hiaa),2,2′-聯吡啶,氫氧化鈉和六水合高氯酸錳在水和乙醇中反應合成了1個二維配位化合物{[Mn(iaa)(2,2′-bipyridine)(H2O)](ClO4)}n(1)。單晶結構表明化合物1是1個新穎的二維雙核錳配位聚合物,錳離子的配位構型為扭曲的八面體。每一個錳離子與3個配體配位,而每個配體與3個錳離子橋連。磁性研究表明1中Mn(Ⅱ)離子間存在弱的反鐵磁偶合作用。