希土元素钼钨硅多元杂多配合物的合成、结构和性质研究

STUDY ON SYNTHESIS, CRYSTAL STRUCTURE AND CHARACTER OF LANTHANIDE POLYBASIC HETEROPOLY COMPLEXES WITH SILICON.....MOLYBDEN UM- TUNGSTEN

本文报道了标题系列配合物K_(10)H_3[Ln(SiMo_(11-n)W_nO_(39))_2]·mH_2O(n=2、4;Ln=La^(3+)、Ce^(3+)、Pr^(3+)、Nd^(3+)、Sm^(3+)、Eu^(3+)、Gd^(3+)、Dy^(3+)、Yb^(3+))的合成、热解性质、氧化还原性以及某些波谱特性。测定了K_(10)H_3[La(SiMo_9W_2O_(39)_2]·27H_2O的单晶结构:a=17.224(6)(?),b=26.952(11)(?),c=21.158(7)(?),β=103.76(3)°,Z=4,V=9540.17(6)(?)~3,F(000)=8663,此晶体属于单斜晶系,P2_1/n空间群。

A series of polybassc lanthanide heteropoly complexes K10H3[Ln(SiMo11-nWnO39)2] ?mH2O(where n = 2,4; Ln = La3+, Ce3+, Pr3+, Nd3+, Sm3+, Eu3+, Gd3+, Dy3+, Yb3+) were prepared. Their molecula formula were decided by elemental analysis and thermogravimctric analysis. Crystal structure and molecula structure of K10H3[La(SiMo9W2O39)2] 29H2O are determined using X-Ray single crystal analysis, space group P2 / n, a=17.224(6)A, b = 26.952(11)A c=21.158(7)A, β=103.76(3)°, Z=4, V= 9540.17(6)A3, F(000)= 8663. Thermal decomposition arc investigated by means of IR spectrs, X-Ray powder diffraction and differential therm-al-thermogravimetric analysis. The results of acid--base titration show the complexes arc stable in the range pH = 2.5-6.1, in the meantime, oxidation-reduction, TR spectra, UV spectra, XPS spectra and X-Ray powder diffraction character of these complexes were also discussed.