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首页> 外文期刊>Crystal growth & design >Room Temperature Synthesis, Crystal Structure, Water Sorption, and Thermal and Electronic Properties of {[Cu(phen)]2[Cu(phen)2]2Nb6O19}·24H2O
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Room Temperature Synthesis, Crystal Structure, Water Sorption, and Thermal and Electronic Properties of {[Cu(phen)]2[Cu(phen)2]2Nb6O19}·24H2O

机译：室温合成，晶体结构，吸水和{[Cu（phen）] 2 [Cu（phen）2] 2nb6o19} 24h2o的热和电子性质

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摘要

The new compound {[Cu(phen)]_(2)[Cu(phen)_(2)]_(2)Nb_(6)O_(19)}·24H_(2)O (I ) (phen = 1,10-phenanthroline) was prepared under ambient conditions. The crystal structure is composed of the [Nb_(6)O_(19)]~(6–) anion which is expanded by two different Cu~(2+) centered complexes via Cu–O bonds to form a charge neutral compound. One polyhedron around Cu~(2+) is a slightly distorted square pyramid, while the second polyhedron is between square pyramidal and trigonal bipyramidal. The distortion of the polyhedra is reflected in the EPR spectrum. The molecules are arranged in a layer-like fashion with the crystal water molecules forming a cluster being located between the layers. The crystal water molecules can thermally be removed, and water sorption experiments show a steplike water uptake, leading to full recovering of the crystal structure. The steplike behavior is explained by the differing strengths of hydrogen bonding interactions. A room temperature in situ X-ray diffraction experiment demonstrates that the pristine material loses water, forming first an intermediate compound and finally a water-deficient crystalline sample. Luminescence measurements demonstrate a weak red glow.
机译：在室温条件下合成了新化合物{[Cu（phen）]2[Cu（phen）2）]2）Nb_6）O_19}·24H_2）O（I）（phen=1,10-菲咯啉）。晶体结构由[Nb_6）O_19]~（6–）阴离子组成，该阴离子由两个不同的以Cu~（2+）为中心的配合物通过Cu–O键展开，形成电荷中性化合物。Cu~（2+）周围的一个多面体是一个略微扭曲的方形棱锥体，而第二个多面体位于方形棱锥体和三角双锥体之间。多面体的畸变反映在EPR光谱中。分子以层状方式排列，结晶水分子在层之间形成团簇。晶体水分子可以被热去除，吸水实验显示出阶梯状的吸水，导致晶体结构的完全恢复。这种阶梯状行为可以用氢键相互作用的不同强度来解释。室温原位X射线衍射实验表明，原始材料失水，首先形成中间化合物，最后形成缺水晶体样品。发光测量显示出微弱的红光。

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  • 来源
    《Crystal growth & design》 |2021年第1期|共10页
  • 作者

    Philipp Müscher-Polzin; Christian N?ther; Wolfgang Bensch;

  • 作者单位

    Institute for Inorganic Chemistry Christian-Albrechts-University of Kiel Max-Eyth-Str;

    Institute for Inorganic Chemistry Christian-Albrechts-University of Kiel Max-Eyth-Str;

    Institute for Inorganic Chemistry Christian-Albrechts-University of Kiel Max-Eyth-Str;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 晶体学;
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