新型无机-有机杂化材料Mo_8O_(26)(H_2bpy)_2的合成、结构及性能研究(bpy=4,4′-bipyridine)

Synthesis,crystal structure and properties of a novel inorganic-organic hybrid material Mo_8O_(26)(H_2bpy)_2(bpy=4,4′-bipyridine)

以(NH4)6[Mo7O24].4H2O、Co(NO3)2.6H2O、4,4′-联吡啶、冰乙酸和无水乙醇为原料,在150℃下反应3 d,得到粉绿色晶体Mo8O26(H2bpy)2。通过红外光谱、元素分析和单晶X-射线衍射法表征该无机-有机杂化材料的结构。结果表明:该晶体属单斜晶系,Pī空间群;晶胞参数a=10.7200(6),b=15.1819(9),c=10.7464(6),β=93.7930(10)°,V=1745.15(17)3,Z=4;用6518个独立衍射点(R(int)=0.0185)精修结构,最终残差因子R1=0.0239,wR2=0.0261。通过UV/VIS/NIR反射光谱的研究表明,此杂化材料对太阳辐射具有选择性的吸收;同时探讨了反应条件对合成产物的影响。本晶体结构数据已收录于英国剑桥晶体学数据库,编号为:CCDC286752。

The hydrothermal reaction of （NH4）6 [ Mo7O24 ]· 4H2O, Co （ NO3 ）2· 6H2O, 4, 4＇-bipyridine, HOAc and ethanol at 150℃ for 3 days produced pale green crystals, Mo8O26（H2bpy）2. The material was characterized by IR spectroscopy, elemental analysis and single-crystal X-ray diffraction. Crystals are monoclinic with space o group Pi and unit cell parameters as follows： a = 10. 7200 （6）, b = 15. 1819 （9）, c = 10. 7464 （6） A, β = 93. 7930（10）°, V = 1745.15 （17） A°^3, Z = 4. Structure solution and refinement based on 6518 （R （int） = 0. 0185） reflections converged at R 1 = 0. 0239 and wR2 = 0. 0261. UV/VIS/NIR diffuse reflectance spectra indicate that Mo8O26（H2bpy）2 has useful solar radiation absorption properties. Crystallographic data for the structural analysis have been deposited at the Cambridge Crystallographic Data Center, CCDC No. 286752 for the title compound.