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Citation: Ren Jimin, Pei Fengkui, Wang Wenyun, Ni Jiazuan. NMR STUDY OF INTERACTION BETWEEN DIPEPTIDE GLY-ALA AND LANTHANIDE IONS IN AQUEOUS SOLUTION[J]. Chinese Journal of Applied Chemistry, ;1992, 9(4): 41-45. shu

NMR STUDY OF INTERACTION BETWEEN DIPEPTIDE GLY-ALA AND LANTHANIDE IONS IN AQUEOUS SOLUTION

1.
Changchun Institute of Applied Chemistry, Academia Sinica, Changchun 130022

Corresponding author: Pei Fengkui,
Received Date: 2 July 1991
Available Online: 11 September 1991
Fund Project:

¹H and ¹³C NMR techniques were used to study complexation of lanthanide ions with Gly-Ala in aqueous solution. For Yb complex with Gly-Ala the stability constant was calculated from the concentration dependence of lanthanide-induced shifts. ¹³C shifts induced by heavy lanthanide ions Dy³⁺, Ho³⁺, Er³⁺, Tm³⁺ and Yb³⁺ were analyzed by Reuben's method. The simulation for ligand conformation of lanthanide complex with Gly-Ala shows that the ligand segment C1-C2-N-C3 is in gauche form,while the segments C2-N-C3-C4 and C5-C2-N-C3 in trans form. The effects of side-group size of several glyeine-eontaining dipeptides on complex stability constants, ligand conformations and structure of complexes in solution were discussed.
- glycyl-alanine,
- lanthanide-indueed shift,
- NMR
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