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.
Two cyano-bridged heterobimetallic coordination polymers, [{Mn(dpa)2}2W(CN)8·CH3CN·4H2O]n (1) (dpa = 2,2'-dipyridylamine) and [Mn2(H2O)4{W(CN)8}·3H2O]n (2), have been synthesized and characterized structurally and magnetically. X-ray analysis shows that complex 1 is a one-dimensional (I-D) polymer of W2(CN)4Mn2 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 A× 11.82 A). Fitting of the magnetic properties indicates that both polymers exhibit weakly antiferromagnetic interactions between the adjacent Mn ions.
出处
《中国科学(B辑)》
CSCD
北大核心
2009年第11期1348-1355,共8页
Science in China(Series B)
基金
国家自然科学基金(批准号:20771057,20721002,20631030)
国家重大基础研究发展计划(批准号:2006CB806104,2007CB925102)的资助
关键词
氰基桥连
配位聚合物
磁性质
锰化合物
cyano-bridged, coordination polymer, magnetic property, manganese( II ) complex