Abstract
67Zn NMR studies of naturally abundant Zn 2+-imidazole and carboxylate ligands Complexes are shown. Thus, quadrupolar relaxation changes in 67Zn NMR caused by adding imidazole ligands are more remarkable than those by carboxylate ligands. The changes caused by adding less bulky imidazole ligands are more prominent than those caused by a bulky imidazole ligan. Changes in Zn 2+ quadrupolar relaxation rate caused by adding a cyclic hexapeptide consisting of L-histidine, L-cystein(Acm) and D-leucine are larger than those by a corresponding linear hexapeptide. Those changes in the quadrupolar relaxation rate of 67Zn NMR among Zn 2+ complexes can be reasonably interpreted in terms of the differences of equilibrium constants of those complexes to a first approximation.
Published Version
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