Acta Phys. -Chim. Sin. ›› 1992, Vol. 8 ›› Issue (02): 270-273.doi: 10.3866/PKU.WHXB19920226

• Note • Previous Articles     Next Articles

13C and 1H NMR Studies of Solution Structure of Lanthanide Complex with Glycyl-Glycine

Ren Ji-Min; Niu Chun-Ji; Pei Feng-Kui; Wang Wen-Yun; Ni Jia-Zuan   

  1. Changchun Institute of Applied Chemistry, Academia Sinica, Changchun 130022
  • Received:1990-12-28 Revised:1991-05-07 Published:1992-04-15
  • Contact: Pei Feng-Kui;

Abstract: ~(13)C and ~1H NMR technique was used to study the interaction of Gly-Gly with heavy lanthanide cations Dy~(3+), Ho~(3+), Er~(3+), Tm~(3+) and Yb~(3+) in aqueous solution. The stability constants for the 1:1 and 1:2 complexes of Gly-Gly with Ho~(3+) and Yb~(3+) were determined from the titration curves of chemical shift versus concentration ratio of lanthanide to Gly-Gly. The solution structure of the Ln-Gly-Gly complex was analyzed based upon the ~(13)C and ~1H lanthanide-induced shifts and the results show that in the complex Gly-Gly is coordinated to the lanthanide ion through the carboxyl oxygens with the backbone of the ligand in an extended state.

Key words: Glycyl-Glycine, Lanthanide complex, Solution structure, Nuclear magnetic resonance