以[β-Mo_8O_(26)]~(4-)阴离子为构筑块的有机-无机复合物的合成、结构及性质

以[(C4H9)4N]4Mo8O26·nH2O和[Cr3O(C6H5COO)6(H2O)3]NO3为原料,利用常规水溶液法合成了一种由同多阴离子[β-Mo8O26]4-和大阳离子[Cr3O(C6H5COO)6(H2O)3]+通过静电作用形成的有机-无机复合物[Cr3O(C6H5COO)6(H2O)3]4[Mo8O26]·11.5H2O(1).X射线单晶衍射结果表明,该晶体属三斜晶系,P-1空间群,晶胞参数:a=1.545 2(2)nm,b=2.035 1(3)nm,c=2.218 5(3)nm,α=63.097(3)°,β=72.545(3)°,γ=85.114(3)°.对化合物1的热稳定性进行了研究.热重分析表明化合物的失重分两步进行:第一步对应于11.5个结晶水和12个配位水的失去;第二步对应于24个C6H5COO-的失去.     

Synthesis and Characterization of a Bismuth Incorporating Heptamolybdate:(NH_4)_4[HMo_7O_(24)Bi(H_2O)_2C_5H_3N(CO_2)_2]·7H_2O

A new one-dimensional molecule based on the linkage of [Mo7O24] clusters and [BiL](L = pyridine-2,6-dicarboxylic acid) assembles under ambient conditions. The title compound was characterized by X-ray powder diffraction, IR and UV spectra, thermogravimetric analysis, and single-crystal X-ray diffraction. Crystal data: C7H38BiMo7N5O37, Mr = 1664.95, monoclinic, space group C2/c, a = 24.312(2), b = 21.4869(18), c = 18.5423(16) , β = 111.6490(10)o, V = 9002.9(13) 3, Z = 8, μ = 5.883 mm–1, F(000) = 6304, GOF = 1.045, R = 0.0365 and wR = 0.1062.