铌取代Dawson结构钨磷杂多配合物的合成及其结构表征

Synthesis and Structural Characterization of the Dawson-type Tungstophosphate Heteropoly Complexes Substituted by Niobium

本文报道了八种新化合物α_2-M_(7-m)H_m[P_2W_(17)NbO_(62)]·xH_2O,α-1,2,3-M_(9-m)H_m[P_2W_(15)Nb_3O_(62)]·xH_2O(M=K,TMA,TEA,TBA)的合成和表征.红外和紫外光谱表明两种阴离子具有Dawson结构,^(31)P和^(183)W NMR测定结果表明铌原子确系“极位”一、三取代.α-1,2,3-K_7H_2[P_2W_(15)Nb_3O_(62)]·30H_2O为六方晶系,晶胞参数为:a=1.9836(4),b=1.9836(9),C=1.5498(6)nm,a=β=90°,γ=120°.此外,还报道了极谱、XPS和XRD结果.

Eight new complexes α2-M7-mHm[ P2W17NbO62] · xH2O and α-1, 2, 3-M9-mHm [ P2W15Nb3O62]·xH2O (M=K, TMA, TEA, TBA) were synthesized and characterized by IR and UV spectroscopy, polarography, XPS and XRD methods. 31P and 183W NMR studies show that the niobium atoms in the anions are on the polar sites. The crystal of α-1, 2, 3-K7H2 [P2W15Nb3O62]·30H2O is hexagonal, its cell parameters: a = 1.9836(4), b = 1.9836(9), c = 1.5498(6) nm,α= β=90°,γ= 120°.