【摘要】 合成了两个氰基桥连的异金属配位聚合物[{Mn(dpa)2}2W(CN)8·CH3CN·4H2O]n(1)和[Mn2(H2O)4{W(CN)8}·3H2O]n(2),并对它们进行了结构和磁性表征.X-射线单晶结构分析表明,在化合物1中,W2(CN)4Mn2四核片段通过公共的[W(CN)8]4-离子相互连接,形成一个无限延伸的一维链状结构.化合物2的结构较为复杂,是一个含有一维孔道(约13.21×11.82)的三维网状结构.磁性研究表明,在两种化合物中,相邻的两个锰离子之间抗磁性的八氰基配离子均传递非常微弱的反铁磁相互作用.更多还原

【Abstract】 Two cyano-bridged heterobimetallic coordination polymers,[{Mn(dpa) 2 } 2 W(CN) 8 ·CH 3 CN·4H 2 O] n (1) (dpa=2,2’-dipyridylamine) and [Mn 2 (H 2 O) 4 {W(CN) 8 }·3H 2 O] n (2),have been synthesized and characterized structurally and magnetically.X-ray analysis shows that complex 1 is a one-dimensional (1-D) polymer of W 2 (CN) 4 Mn 2 square units in which adjacent square fragments are interlinked by sharing [W(CN) 8 ] 4- moieties to form an infinite chain.Complex 2 is a three-dimensional (3-D) polymer,which shows an unforeseen structure,exhibiting a 3-D open network with a 1-D channel (ca.13.21  × 11.82 ).Fitting of the magnetic properties indicates that both polymers exhibit weakly antiferromagnetic interactions between the adjacent Mn ions.更多还原