Monodentate coordination of 4,4′-bipyridine leading to a supramolecular network - Synthesis and crystal structure of [H _2bpp][{Cu(Hbpy)_2}{α-HP_2W _(18)O_(62)}]·4H_2O

Li J.; Wang D.-P.; Chen Y.-G.; Zhang C.-J.

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Monodentate coordination of 4,4′-bipyridine leading to a supramolecular network - Synthesis and crystal structure of [H _2bpp][{Cu(Hbpy)_2}{α-HP_2W _(18)O_(62)}]·4H_2O

机译：4,4'-联吡啶的单齿配位导致超分子网络-[H _2bpp] [{Cu（Hbpy）_2} {α-HP_2W_（18）O_（62）}]·4H_2O的合成和晶体结构

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The new supramolecular compound [H_2bpp][{Cu(Hbpy) _2}-{α-HP_2W_(18)O_(62)}]4H _2O(1) (bpy = 4,4′-bipyridine, bpp = 1,3-bis(4-pyr-idyl)propane) was synthesized hydrothermally and characterized by elemental analysis, IR spectroscopy, thermogravimetric analysis and single-crystal X-ray diffraction. In compound 1, the cationic fragment [Cu(Hbpy)_2]~+connects to the Dawson anion through a coordinating Cu←O bond, and the copper atom is coordinated by another polyox-oanion through a weak covalent bond with a Cu1 - O26 distance of 2.879(2) ?, forming a polymeric chain. The bpy ligand in [Cu(Hbpy)_2]~+adopts a monodentate coordination mode, the other nitrogen atom of the bpy ligand is protonated. The protonated Hbpy ~+acts as hydrogen-bond donor and constructs a two-dimensional double-sheet supramolecular network involving the one-dimensional chains through the hydrogen bonds. The H_2bpp~(2+)ion connects two α-HP_2W_(18)O_(62)~(6-)clusters from two supramolecular networks through hydrogen bonds and creates a three-dimensional supramolecular architecture. The thermal decomposition of 1 happens over a wide temperature range (450-800 °C), which indicates that it might include complicated oxidation-reduction processes.

机译：新的超分子化合物[H_2bpp] [{Cu（Hbpy）_2}-{α-HP_2W_（18）O_（62）}] 4H _2O（1）（bpy = 4,4'-联吡啶，bpp = 1,3-水热合成双（4-吡啶基-丙烷）丙烷，并通过元素分析，红外光谱，热重分析和单晶X射线衍射进行表征。在化合物1中，阳离子片段[Cu（Hbpy）_2]〜+通过配位的Cu←O键与Dawson阴离子连接，铜原子通过与Cu1-O26的弱共价键与另一个聚氧阴离子配位。距离为2.879（2），形成聚合物链。 [Cu（Hbpy）_2]〜+中的bpy配体采用单齿配位模式，bpy配体的另一个氮原子被质子化。质子化的Hbpy〜+充当氢键供体，并构建一个二维双层超分子网络，其中包含通过氢键的一维链。 H_2bpp〜（2+）离子通过氢键连接两个超分子网络中的两个α-HP_2W_（18）O_（62）〜（6-）团簇，形成三维超分子结构。 1的热分解发生在很宽的温度范围（450-800°C）中，这表明它可能包括复杂的氧化还原过程。

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《Zeitschrift fur Anorganische und Allgemeine Chemie》 |2009年第15期|共3页
作者
Li J.; Wang D.-P.; Chen Y.-G.; Zhang C.-J.;
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正文语种 eng
中图分类化学;
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Hydrothermal synthesis; Polyoxometalates; Supramolecular chemistry; Thermal properties; X-ray diffraction;

机译：水热合成;多金属氧酸盐;超分子化学;热性质;X射线衍射;

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Monodentate coordination of 4,4′-bipyridine leading to a supramolecular network - Synthesis and crystal structure of [H _2bpp][{Cu(Hbpy)_2}{α-HP_2W _(18)O_(62)}]·4H_2O

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