Intrinsic proton relaxation parameters of hydrated polyglycine from two-dimensional time domain NMR

Proton two-dimensional lime domain nmr involving T-1, T-1 rho, T-1D, and T- 2 measurements was applied to hydrated polyglycine powders. The results wer e analyzed for magnetization exchange and found to be consistent,vith a gen eral three-site (glycine-water-glycine) exchange model. The intrinsic glyci ne and water proton relaxation parameters as well as the three exchange rat es were obtained. Estimates of correlation times for water molecule motion at hydration sites are presented. (C) 1999 John Wiley & Sons, Inc.