摘要
本文报道了镧系元素的杂多钨砷酸钾 K_(17)[Ln(As_2W_(17)O_(61))_2]·xH_2O(Ln=La,Ce,Pr,Nd,Sm,Eu,Gd,Tb,Dy,Tm,Yb)的合成方法和 X 射线粉末衍射,紫外,红外,差热,X 光电子能谱,有效磁矩及极谱的研究结果.
The polytungstoarsenate K_(17)[Ln(As_2W_(17)O_(61))_2](Ln=La,Ce,Pr,Nd,Sm,Eu,Gd,Tb,Dy,Tm,Yb)were preparaed.Some properties of these compounds have beenstudied.The stability range of the anions is given in terms of the pH.Their UV,IR,DTA,X-ray powder diffraction patterns,XPS,magnetic susceptibility of thelanthanides in complexes and polarographic reduction studies are reported.Magneticmeasurement confirms that the lanthanide elements exist mainly in+3 oxidation statein these complexes and the magnetic moments are very close to the value given by vanVleck.XPS determination represents Ln—O bond of coordination character as well asthe shifts of W 4f and O 1s between K_(17)[Ln(As_2W_(17)O_(61))_2] and (NH_4)_6As_2W_(18)O_(62)·Polarographic determination shows that there are three two-electron waves when thesecomplexes are reduced indicating the reduction of tungsten.
出处
《化学学报》
SCIE
CAS
1988年第12期1168-1174,共7页
Acta Chimica Sinica
基金
国家科学基金委员会资助
