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首页> 外文期刊>RSC Advances >New binuclear copper(ii) coordination polymer based on mixed pyrazolic and oxalate ligands: structural characterization and mechanical properties
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New binuclear copper(ii) coordination polymer based on mixed pyrazolic and oxalate ligands: structural characterization and mechanical properties

机译：基于混合吡唑醇和草酸盐配体的新的Binuclear铜（II）配位聚合物：结构表征和机械性能

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摘要

A new inorganic–organic coordination polymer based on a copper( II ) binuclear complex coordinated with pyrazole ( L1 ), 1-(hydroxymethyl)pyrazole) ( L2 ) and oxalate ( Ox ) ligands has been unexpectedly obtained. The crystal structure of this coordination polymer has been unequivocally determined from single crystal X-ray diffraction. One copper( II ) center (Cu1) is four-coordinated with two nitrogens (N2, L1 and N3, L2), one oxygen (O1, L1) and one chlorine atom, while the other copper( II ) nucleus (Cu2) is five-coordinated with one nitrogen (N1, L1), three oxygens (O1, L2; O2 and O3, Ox) and one chlorine atom, giving slightly distorted square-planar and square-pyramidal geometries, respectively. To the best of our knowledge, such coordination environments have never been previously observed to coexist in the same structure. The terminal chlorine (Cl1) forms the connecting bridge between the planar binuclear [Cu _(2) Cl(Ox) _(0.5) (L1)(L2)] _(n) units ending in an attractive structural framework. An extended layered structure staggered along the b -axis is observed in the supramolecular view. Nanoindentation experiments were carried out and relevant mechanical parameters such as hardness, Young’s modulus, indentation energies and elastic recovery were determined. Additionally, a comparative analysis between the supramolecular structure and the mechanical properties is reported.
机译：基于铜（II）双核复合物的新型无机 - 有机配位聚合物，与吡唑（L1），1-（羟甲基）吡唑（L 2）和草酸盐（OX）配体进行了意外。该配位聚合物的晶体结构从单晶X射线衍射无概念地确定。一种铜（II）中心（CU1）用两个氮（N2，L1和N3，L2），一种氧（O1，L1）和一种氯原子，而其他铜（II）核（CU2）是四种协调的。用一个氮气（N1，L1），三种氧（O1，L2; O 2和O 3，OX）和一个氯原子，分别具有略微扭曲的方形平面和方形锥体几何形状。据我们所知，此前从未观察过这种协调环境以在相同的结构中共存。末端氯（CL1）形成以有吸引力的结构框架结束的平面B上核[Cu _（2）Cl（0.5）（0.5）（L2）] _（n）单元之间的连接桥。在超分子视图中观察到沿着B-XXIS交错的扩展层状结构。进行纳米狭窄实验，并确定相关的机械参数，如硬度，杨氏模量，压痕能量和弹性恢复。另外，报道了超分子结构与机械性能之间的比较分析。

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