摘要
用复分解法首次合成出7种稀土元素Keggin结构钨磷杂多配合物;LnPW_(12)O_(40)·xH_2O(Ln=La,Ce,Pr,Nd,Sm,Eu,Gd)。通过ICP、^(31)PNMR,IR、UV、x—射线粉末衍射、DTA—TGA、极谱对它们进行丁表征。极谱研究表明有三个氧化还原步骤,红外光谱表明抗衡阳离子和结晶水对v_W-o_d和v_W-o-W的振动频率有影响。热分析表明所有配合物的分解湿度为580℃左右。
Seven new heteropoly complexes salts of rare earth 12 - tungstenphosphates Ln [PW12O40] xH2O(Ln = La,Ce,Pr,Nd,Sm,Eu,Gd)were prepared by double decomposition method and characterized by ICP,31P NMR,1R ,UV ,x - ray powder diffraction.DTA - TGA and polarography. Polarograms of LnPW12O<0 show three reduction steps. The IR spectra show that the countercations and the crystallization water have an influence upon the vibration frequencies of iv-odand vw-o-w All the complexes decompose at about 580C.
出处
《湖北大学学报（自然科学版）》
CAS
1993年第2期161-166,共6页
Journal of Hubei University：Natural Science
关键词
钨磷杂多酸盐
KEGGIN结构
稀土族
Heteropoly tungstenphosphates Keggin structure Rare earth elements
