Spectroscopic investigation of interactions between dipeptides and vanadate(V) in solution |
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| Authors: | Durupthy Olivier Coupé Aurélie Tache Lawrence Rager Marie-Noëlle Maquet Jocelyne Coradin Thibaud Steunou Nathalie Livage Jacques |
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| Affiliation: | Laboratoire Chimie de la Matière Condensée, UMR CNRS 7574, Tour 54 E5, Université Pierre et Marie Curie (Paris 6), 4 place Jussieu, 75252 Paris Cedex 05, France. |
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| Abstract: | The reaction of vanadate(V) with a series of dipeptides (Val-Gln, Ala-Gln, Gly-Gln, Gly-Glu, and Ala-Gly) was investigated by UV-visible spectroscopy and multinuclear ((51)V, (14)N, (13)C) NMR spectroscopy in solution. It was possible to evaluate the formation constants of the corresponding complexes for which a molecular structure was proposed. Complex formation is favored by the presence of a functionalized or a sterically demanding side chain. The Val-Gln dipeptide which combines both properties exhibits one of the highest formation constant reported so far for dipeptides. |
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