摘要
A new kind of Anderson type chromium molybdates containing the rare earth elements are synthesized, which have the general molecular formula of (NH4)6[CrMo5Ln(OH2)2O24H6]·xH2O (Ln=La,Ce,Pr,Nd,Sm,Gd and Yb). The components of theseheteropoly complexes are determined by chemical elemental analysis, ICP and TG DTA. And IR, UV, ESR,XPS and 1H NMR are also applied to characterize the complexes as well. The results indicate that the structures of these complexes are Anderson B type and the rare earth elements are in the inner sphere of the heteropoly salts. The thermal stabilities of these complexes studied by TG DTA show that the range of pyrolysis temperature is between 490℃and 500℃.
A new kind of Anderson-type chromium-molybdates containing the rare earth elements are synthesized, which have the general molecular formula of (NH4) (6)[CrMo(5)Ln(OH2)(2)O24H6] (.) xH(2)O Mn = La, Ce, Pr, Nd, Sm, Gd and Yb). The components of these heteropoly complexes are determined by chemical elemental analysis, ICP and TG-DTA. And IR, UV, ESR, XPS and H-1 NMR are also applied to characterize the complexes as well. The results indicate that the structures of these complexes are Anderson B type and the rare earth elements are in the inner sphere of the heteropoly salts. The thermal stabilities of these complexes studied by TG-DTA show that the range of pyrolysis temperature is between 490degreesC and 500degreesC.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2003年第2期183-186,共4页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金资助项目(No.29671009)
