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首页> 外文期刊>Crystal growth & design >Structural Versatility of 3d-Ce-III Heterometallic Coordination Polymers Using Co-II or Cu-II
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Structural Versatility of 3d-Ce-III Heterometallic Coordination Polymers Using Co-II or Cu-II

机译：3D-CE-III杂象配位使用CO-II或CU-II的结构多功能性

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摘要

In the present work, we report the synthesis and characterization of two new heterometallic coordination polymers based on Ce-III and containing Co-II or Cu-II cations, assembled by the bifunctional ligand 1H-imidazole-4,5-dicarboxylic acid, [Ce(H2O)(2)(HIDC)Co(IDC)]center dot H2O CoCe and [Ce(H2O)(2)(H2IDC)Cu(H2O)(IDC)Cu-0.2(H1.6IDC)] CuCe. Compound CoCe was obtained under one pot hydrothermal synthesis, while CuCe was synthesized by a step-by-step synthesis using the metalloligand [Cu(H2IDC)(2)-(H2O)(2)] Cu1, as precursor. From a structural point of view, CoCe presents an intrincated 3D structure, in which alternating Lambda-Delta chiral Co-II chains can be observed, which are assembled by discrete Ce-III fragments, giving rise to the 3D structure. Meanwhile, CuCe presents a structure formed by [Cu2Ce2] heterometallic chains, partially assembled by Cu-II cations in a 2D structure. Magnetic properties reveal that both CoCe and CuCe present a global antiferromagnetic behavior, dominated by the interaction between Co-II-Co-II or Cu-II-Cu-II entities connected by mu(2)-kappa N,O-kappa O"',N' bridges, belonging to H3IDC anionic derivatives. Moreover, a weak ferromagnetic phenomenon was found in compound CoCe, corroborated by hysteresis loops and ac magnetization.
机译：在本作工作中，我们报告了基于CE-III的两种新的杂动机配位聚合物的合成和表征，并含有由双官能配体1H-咪唑-4,5-二羧酸组装的CE-III或Cu-II阳离子，[ Ce（H2O）（2）（HIDC）CO（IDC）]中心点H2O COCE和[Ce（H2O）（2）（2）（H2IDC）Cu（IDC）Cu-0.2（H1.6idc）] Cuce。在一个罐水热合成中获得化合物CoCE，而使用金属溶胶和[Cu（H2IDC）（2） - （2） - （2）] Cu1作为前体，通过逐步合成合成Cuce。从结构的角度来看，COCE呈现有内存的3D结构，其中可以观察到交替的Lambda-Delta手性Co-II链，其由离散CE-III片段组装，从而产生3D结构。同时，Cuce呈现由[Cu2CE2]杂常金属链形成的结构，由2D结构中的Cu-II阳离子部分组装。磁性表明，CODE和Cuce呈现出全局反铁磁性行为，其由MU（2）-Kappa N，O-Kappa O“连接的Co-II-Co-II或Cu-II-II-II实体之间的相互作用为主。 '，n'桥，属于H3idc阴离子衍生物。此外，在化合物CoCE中发现了弱铁磁现象，通过滞后环和AC磁化来证实。

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