pH-dependent assembly of hybrids based on Wells-Dawson POM/Ag chemistry

被引：166

作者：

Sha, Jingquan ^{[1
,2
]}

Peng, Jun ^{[1
]}

Lan, Yaqan ^{[1
]}

Su, Zhongmin ^{[1
]}

Pang, Haijun ^{[1
]}

Tian, Aixiang ^{[1
]}

Zhang, Pengpeng ^{[1
]}

Zhu, Min ^{[1
]}

机构：

[1] NE Normal Univ, Fac Chem, Minist Educ, Key Lab Polyoxometalate Sci, Changchun 130024, Peoples R China

[2] Jiamusi Univ, Fac Chem Pharm, Jiamusi 154007, Heilongjiang, Peoples R China

来源：

INORGANIC CHEMISTRY | 2008年 / 47卷 / 12期

关键词：

D O I：

10.1021/ic702407y

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Four new hybrids based on the Wells-Dawson polyoxometalate [P2W18O62](6-) (P2W18), {[Ag(bipy)](2)[P2W18O62]}center dot 2[H(2)bipy]center dot 4H(2)O (1), {[Ag(bipy)](4)[P2W18O62]}center dot 2[Hbipy] (2), K[P2W18O62]center dot 2.5[H(2)bipy]center dot 2H(2)O (3), and [P2W18O62](2)center dot[H(2)bipy](4) center dot [Hbipy](4)center dot 3H(2)O (4), were hydrothermally synthesized and structurally characterized by routine techniques and single-crystal X-ray diffraction. Compounds 1 and 2 are isolated at lower pH values. 1 represents a 3D (4,4)-net structure with NbO topology, in which the P2W18 clusters are modified by four Ag-N coordination polymeric chains, and 2 exhibits a 3D (3,4)-net structure with the (9(2). 12)(8.10(4).12)(3(2).10(2). 11(2)) (3. 6.10(2).12(2)) topology, in which Ag-bipy layers are intercalated by the dimer of PAS clusters in a staggering mode, and the P2W18 clusters show the highest coordination number to date. By increasing the pH value, compounds 3 and 4 are obtained as supramolecular compounds. Their structural differences reveal that the pH value of the reaction system is the key factor influencing the structure and topology of these compounds, which can be explained by the acid-base chemistry of the molecular building units and silver chemistry.

引用

页码：5145 / 5153

页数：9

共 65 条

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