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Acta Phys. -Chim. Sin.  1992, Vol. 8 Issue (02): 270-273    DOI: 10.3866/PKU.WHXB19920226
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
Changchun Institute of Applied Chemistry, Academia Sinica, Changchun 130022
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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 wordsGlycyl-Glycine      Lanthanide complex      Solution structure      Nuclear magnetic resonance     
Received: 28 December 1990      Published: 15 April 1992
Corresponding Authors: Pei Feng-Kui;   
Cite this article:

Ren Ji-Min; Niu Chun-Ji; Pei Feng-Kui; Wang Wen-Yun; Ni Jia-Zuan. 13C and 1H NMR Studies of Solution Structure of Lanthanide Complex with Glycyl-Glycine. Acta Phys. -Chim. Sin., 1992, 8(02): 270-273.

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