摘要
本文通过稀土高氯酸盐与L-丙氨酸(L-Ala)及咪唑(Im)反应,合成了标题配合物RE(Ala)_4(Im)(ClO_4)_3·2H_2O(RE=Pr,Nd,Sm),测定了配合物的红外光谱,对其主要吸收带进行了归属。红外光谱的研究结果表明,丙氨酸以内盐的形式存在于配合物中,通过羧基与稀土离子配位,且随着RE原子量的增大,羧基与RE^(3+)间配位键离子性逐渐减弱,共价性逐渐增大;咪唑环上的N参与了配位。
The title complexes RE(Ala)(4)(IM)(ClO4)(3) . 2H(2)O (RE = Sm, Pr or Nd) were synthesized by the reaction of rare earth perchlorates with alanine and imidazale in aqueous solution. The infrared spectra of the complexes were measured and their principal IR bands were assigned. The results show that alanine molecules are zwitterions in the complexes and coordinate with rare earth ions through carboxyl groups, and with the atomic weight of rare earth increasing, the ionization of the coordinate band decreases, while the covalence increases. Imidazale was found to coordinate with rare earth by nitrogen atom.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2003年第2期288-290,共3页
Spectroscopy and Spectral Analysis
