RAMAN AND IR SPECTRA OF SOME RARE EARTH COMPLEXES WITH DL-2-AMINO-N-BUTYRIC ACID

  • Đặng Thị Thanh Lê

Abstract

DL-2-amino-n-butyric acid (Hbu) and 12 solid complexes of rare earth elements with Hbu [Ln(Hbu)4]Cl3 (Ln: Y, La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Yb) have been studied by IR and Raman spectra. Hbu ligand in the free state exists  in the form of zwitterion CH3CH2CH(NH3+)COO-, when complexing with Ln3+ions, it has turned into neutral molecules CH3CH2CH(NH2)COOH. In these complexes, Hbu acts as a bidentate ligand bonding to the Ln 3+ions through N atom of the amino group -NH2and O atom (O=C) of the carboxyl group -COOH. The Ln-O bond in the complexes has the dominant characteristics of ionic bond. The strength of the Ln-O bond increases from La to Yb
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Published
2014-11-18
Section
Articles