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首页> 外文期刊>Polyhedron: The International Journal for Inorganic and Organometallic Chemistry >Synthsis, structures and magnetic properties of three new coordination polymers constructed by mixed-linker strategy
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Synthsis, structures and magnetic properties of three new coordination polymers constructed by mixed-linker strategy

机译:混合接头策略构建的三种新配位聚合物的合成,结构和磁性

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By the reaction of a rigid p-conjugated linker of H4L (5,5'-(1,3,6,8-tetraoxobenzo [lmn] [3,8] phenanthroline-2-7- diyl) bis-1,3-benzenedicarboxylic acid), nickel nitrate and N-donor auxiliary linkers under solvothermal conditions, three new Ni-based coordination polymers (CPs), namely {[Ni(L)(0.5)(1,4-bib) (H2O)(2)]center dot 2 center dot 5H(2)O center dot DMA}(n) (1), {[Ni(H2L)(4,4'-bibp)(H2O)(2)]}(n) (2) and {[Ni(L)(0.5)(4,40-bimb)(H2O)(2)]center dot 3 center dot 5H(2)O center dot 2DMA}(n) (3) {1,4-bib = 1,4-bis(1-imidazoly)benzene, 4,4'-bibp = 4,4'-bis(imidazolyl)biphenyl, 4,4'-bimb = 4,4'-bis(imidazol-1-ylmethyl) biphenyl} have been synthesized and characterized by EA, TG, IR, PXRD and magnetic properties. The structural analysis indicates both 1 and 2 are 2D layer structures, which are further extended to 3D supramolecular structures by H-bonding and intermolecular pi...pi interactions. While 3 exhibits a complicated 3D structure with the topology symbol of {6(4).8(2)}. The difference of the structures in CPs 1-3 is mainly attributed to different auxiliary linkers used. Meanwhile, magnetic properties of CPs 1-3 show that the descent of chi T-M values is attributed to zero-field splitting (ZFS) effects of Ni2+ ions. In addition, on account of large Ni2+ Ni2+ separations within these frameworks, magnetic interactions between adjacent Ni2+ ions can be neglected. (C) 2020 Elsevier Ltd. All rights reserved.
机译:通过H4L(5,5'-(1,3,6,8-四氧羰基[LMN] [3,8]菲荧光-2-7-二基)的刚性P缀合的接头的反应。BIS-1,3-苯二羧酸),硝酸镍和N-供体辅助接头在溶剂质条件下,三种新的Ni基配位聚合物(CPS),即([Ni(L)(0.5)(1,4-Bib)(H 2 O)(2) ]中心点2中心点5h(2)o中心点DMA}(n)(1),{[Ni(H2L)(4,4'-BIBP)(H2O)(2)]}(n)(2)和{[Ni(1)(0.5)(4,40-BiMB)(H2O)(2)]中心点3中心点5H(2)O中心点2DMA}(n)(3){1,4-bib = 1,4-双(1-咪唑)苯,4,4'-BIBP = 4,4'-双(咪唑基)联苯基,4,4'-BIMB = 4,4'-BIS(咪唑-1-基甲基通过EA,Tg,IR,PXRD和磁性合成并表征Biphenyl}。结构分析表示1和2是2D层结构,其通过H键合和分子间Pi相互作用进一步扩展到3D超分子结构。虽然3展示了一个复杂的3D结构,{6(4).8(2)}的拓扑符号。 CPS 1-3中的结构的差异主要归因于所用的不同辅助接头。同时,CPS 1-3的磁性特性表明,CHI T-M值的下降归因于Ni2 +离子的零场分裂(ZFS)效应。另外,由于这些框架内的大Ni2 + Ni2 +分离,可以忽略相邻的Ni2 +离子之间的磁相互作用。 (c)2020 elestvier有限公司保留所有权利。

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