摘要
在常规条件下合成了一个新颖的超分子化合物Na8H[{Na(H2O)}3{Mn(C3H4N2)}3(B iW9O33)2].32H2O,通过X射线单晶结构分析、红外光谱及元素分析对该化合物进行了表征.结果表明,该化合物属六方晶系,P6(3)/m空间群.晶胞参数a=1.394 8(4)nm,b=1.394 8(4)nm,c=3.348 6(19)nm,γ=120°,V=5.641(4)nm3,Z=12.该化合物是以-αB-B iW9钨铋酸盐为基本构筑单元的夹心结构化合物.夹层中心3个Mn2+分别与3个咪唑分子配位形成无机-有机杂化材料.3个[{Na(H2O)}3{Mn(C3H4N2)}3-(B iW9O33)2]9-多阴离子结构基元利用氢键(非典型氢键)沿ab面构筑成具有三角形空穴的二维层状骨架结构.这种二维层状结构利用氢键作用沿c轴方向交错排列,形成了含有一维六边形孔道的三维超分子结构.
A novel superamolecular compound, Nas H [ I Na （ H2 O） }3 {Mn （ C3 Ha N2 ） }3 （ BiW9 033 ） 2 ] · 32H2O, was synthesized under the open-air conditions, and characterized by X-ray single-crystal diffraction, IR spectra and elemental analysis. The crystal belongs to hexagonal system, space group/96 （3）/m with a = 1.3948（4） nm, b=1.394 8（4） nm, c =3.348 6（19） nm, 7=120°, V=5.641（4） nm3, Z=12. The crystal structure consists of two α-B-BiW9 subunits and displays a sandwich type polyanion linked by three Mn^2＋ ions between the two α-B-BiW9 units and the Mn^2＋ ions coordinate an imidazole molecule, respectively. Thus, this compound can be considered as a new kind of inorganic-organic hybrid materials. Moreover, three neighboring [I Na（H20）/3 IMn（C3H4N2）/3（BiW9033）2]^9- polyanions form a triangle cavity through the nonclassical hydrogen bonds and such units extend further along ab plane to construct two-dimensional layered framework. Such two-dimensional layered structure further pack each other interlacedly along c axis to construct an interesting three-dimensional supramolecular framework containing a one-dimensional hexagonal channels.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第8期1409-1412,共4页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:20371010)资助
关键词
多金属氧酸盐
咪唑
孔道
超分子化合物
Polyoxometalate
Imidazole
Channel
Superamolecular compound
