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首页> 外文期刊>Crystal growth & design >Structural Variations of the First Family of Heterometallic Uranyl Carboxyphosphinate Assemblies by Synergy between Carboxyphosphinate and Imidazole Ligands
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Structural Variations of the First Family of Heterometallic Uranyl Carboxyphosphinate Assemblies by Synergy between Carboxyphosphinate and Imidazole Ligands

机译:通过羧基次膦酸酯和咪唑配体之间的协同作用,第一家族的异金属铀酰羧基次膦酸酯组装体的结构变异。

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摘要

Hydrothermal reactions of uranyl acetate and a series of transition metal acetates with a carboxyphosphinate and auxiliary N-donor ligands gave rise to the formation of eight heterometallic uranyl-organic assemblies, namely, Co(im)(2)(UO2)(3)(L)(4) (1), Zn(bpi)(UO2)(L)(2) (2), Cd(dib)(UO2)(L)(2) (3), M(dib)(UO2)(2)(L)(3) (M = Cd (4), Mn (5)), and [M(dib)(2)(H2O)(2)][(UO2)(3)(L)(4)]center dot nH(2)O (M = Co (6, n = 2), Ni (7, n = 2), Cu (8, n = 0)) [H2L = (2-carboxyethyl)(phenyl)phosphinic acid (CPP), im = imidazole, bpi =1-(biphenyl-4-yl)-1H-imidazole, dib = 1,4-di(1H-imidazol-1-yl)benzene]. Single-crystal X-ray diffraction (XRD) analysis of 1 reveals a layered structure of UO6, UO7, and CoO4N2 units that are linked by the carboxyphosphinate ligands. Imidazole molecules modify the layer by coordinating to Co centers. Similarly, 2 is a mixed zinc-uranyl carboxyphosphinate with different topological two-dimensional structure and the decorated moiety is a bpi coligand. When in the presence of bridging dib coligands, the mixed cadmium uranyl carboxyphosphinate sheets of 3 are pillared by dib forming a framework structure. The isostructures of 4 and 5 are also pillared frameworks constructed by a mixed heterometallic uranyl phosphinate layered subnet that is different from that of 3. The structures of 6-8 are isotype and very special in that they consist of distinct [M(dib)(2)(H2O)(2)](n)(2n+) cationic and [(UO2)(3)(L)(n)(2n-) anionic subnets. Such two sheets are packed alternatively and interact via hydrogen bond forming three-dimensional supramolecular structures.
机译:乙酸铀酰和一系列过渡金属乙酸酯与羧基次膦酸酯和辅助N-给体配体的水热反应导致形成八个杂金属铀酰-有机组装体,即Co(im)(2)(UO2)(3)( L)(4)(1),Zn(bpi)(UO2)(L)(2)(2),Cd(dib)(UO2)(L)(2)(3),M(dib)(UO2) (2)(L)(3)(M = Cd(4),Mn(5))和[M(dib)(2)(H2O)(2)] [(UO2)(3)(L)( 4)]中心点nH(2)O(M = Co(6,n = 2),Ni(7,n = 2),Cu(8,n = 0))[H2L =(2-羧乙基)(苯基次膦酸(CPP),im =咪唑,bpi = 1-(联苯-4-基)-1H-咪唑,dib = 1,4-二(1H-咪唑-1-基)苯]。对1的单晶X射线衍射(XRD)分析显示了通过羧基次膦酸酯配体连接的UO6,UO7和CoO4N2单元的层状结构。咪唑分子通过与Co中心配位来修饰该层。类似地,2是具有不同拓扑二维结构的混合锌-铀酰羧基次膦酸酯,修饰的部分是bpi coligand。当存在桥联的二链大分子配体时,混合的3铀酰脲基膦酸镉镉薄片通过二联形成柱,形成骨架结构。 4和5的同构结构也是由不同于3的杂金属杂化铀酰次膦酸酯层状子网构成的支柱框架。6-8的结构是同型的,非常特殊,因为它们由不同的[M(dib)( 2)(H2O)(2)](n)(2n +)阳离子子网和[(UO2)(3)(L)(n)(2n-)阴离子子网。这两片被交替地包装,并通过氢键相互作用形成三维超分子结构。

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