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作 者:齐秀丽[1,2] 史岽瑛[1] 罗婕[1,2] 栗玉叶[1] 陈利娟[2]
机构地区:[1]河南大学化学化工学院,河南开封475004 [2]河南大学基础实验教学中心,河南开封475004
出 处:《化学研究》2012年第2期8-12,16,共6页Chemical Research
基 金:Supported by the Natural Science Foundation of China(21101055);China Postdoctoral Science Foundation(20100470996);Natural Science Foundation of Henan Province(092300410119,102300410093);Foundation of Education Department of Henan Province(2009A150003,2010B150006)
摘 要:利用水热方法合成了一种一维超分子链状四核镍夹心的砷钨酸盐[enH2][Ni(en)2]4[Ni4(H2O)2(α-AsW9O34)2].10H2O(1)(en=ethylene diamine);借助元素分析、红外光谱和单晶X射线衍射对其进行了表征。结果表明,化合物1的分子结构单元由1个二支撑的四核镍夹心砷钨酸盐多阴离子{[Ni(en)2]2[Ni4(H2O)2(α-AsW9O34)2]}6-,2个游离的[Ni(en)2]2+配离子,1个游离的双质子化[enH2]2+阳离子和10个结晶水分子组成。有趣的是,相邻的四核镍夹心砷钨酸盐多阴离子{[Ni(en)2]2[Ni4(H2O)2(α-AsW9O34)2]}6-借助Ni…O弱相互作用构筑一维超分子链状结构[Ni…O距离分布在0.253 2~0.283 7nm之间]。One dimensional(1-D) supramolecular chain-like tetra-Ni sandwiched arsenotungstate [ enH 2 ][ Ni(en) 2 ] 4 [ Ni 4(H 2 O) 2(α-AsW 9 O 34) 2 ].10H 2 O(1)(en=ethylene diamine) was synthesized using a hydrothermal route.As-synthesized product was characterized by means of elemental analysis,infrared spectrometry and single-crystal X-ray diffraction.It has been found that the molecular structural unit of 1 consists of a two-supporting tetra-Ni sandwiched polyoxoanion {[ Ni(en) 2 ] 2 [ Ni 4(H 2 O) 2(α-AsW 9 O 34) 2 ]} 6,two discrete [ Ni(en) 2 ] 2+ cations,one free diprotonated [ enH 2 ] 2+ cation and ten lattice water molecules.Interestingly,adjacent tetra-Ni sandwiched polyoxoanions {[ Ni(en) 2 ] 2 [ Ni 4(H 2 O) 2(α-AsW 9 O 34) 2 ]} 6are connected with each other viathe Ni … O weak interactions [ Ni … O distances : 0.253 2-0.283 7nm ],giving rise to 1-D supramolecular chain-like architecture.
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