Three molybdophosphates based on Strandbergtype anions and Zn(_(_(II)))-H_2biim/H_2O subunits: syntheses, structures and catalytic properties?

Zi-Liang Li; Ying Wang; Lan-Cui ZhangJian-Ping WangWan-Sheng YouZai-Ming Zhu

首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Three molybdophosphates based on Strandbergtype anions and Zn(_(_(II)))-H_2biim/H_2O subunits: syntheses, structures and catalytic properties?

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Three molybdophosphates based on Strandbergtype anions and Zn(_(_(II)))-H_2biim/H_2O subunits: syntheses, structures and catalytic properties?

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Three new inorganic-organic hybrid compounds based on Strandberg-type anions and Zn(_(_(II)))-H_2biim/ H_2O subunits, namely {H_4(H_2biim)_3}Zn(H_2biim)(H_3biim)(H_2O)(HP_2Mo_5O_(23))_2·3H_2O (1), {H_9(H_2biim)_7}- (μ-biim){(Zn(H_2O)_2)_(0.5)(HP_2Mo_5O_(23))}_2·7H_2O (2) and {H_7(H_2biim)_7}Zn(H_2biim)(H_2O)2(HP_2Mo_5O_(23))H_2P2Mo5O23· 8H_2O (3) (H_2biim = 2,2'-biimidazole), have been synthesized in aqueous solutions and characterized. They were also used as efficient and reusable catalysts for the protection of carbonyl compounds. Their fascinating structural features are that mono Zn(_(_(II)))-supporting biphosphopentamolybdate ({P_2Mo_5}) clusters exist in their crystal structures, and the nitrogen donor ligand H_2biim exhibits three different coordination modes in these three compounds, respectively: for 1, two 2,2'-biimidazole molecules, as mono- and bidentate ligands coordinate to the same Zn(_(_(II))) ion; for 2, one bi-negative tetradentate ligand μ-biim bridges two Zn(_(_(II))) ions, while for 3, one neutral bidentate H_2biim ligand links one Zn(_(_(II))) ion. Most importantly, compounds 1-3 represent the first example where Strandberg-type POMs are used as acidcatalysts in an organic reaction.

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《Dalton transactions: An international journal of inorganic chemistry》 |2014年第15期|5840-5846|共7页
作者
Zi-Liang Li; Ying Wang; Lan-Cui ZhangJian-Ping WangWan-Sheng YouZai-Ming Zhu;
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作者单位

School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, China;

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正文语种英语
中图分类化学;无机化学;
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inorganic-organic; solutions; Strandberg-type;

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Three molybdophosphates based on Strandbergtype anions and Zn(_(_(II)))-H_2biim/H_2O subunits: syntheses, structures and catalytic properties?

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