A simple formalism for the analysis of NMR in the presence of exchange

Abstract

A theoretical model is presented for the analysis of NMR in the liquid state, when the NMR parameters are modulated by chemical exchange. This model, based on the sudden jump approximation, describes directly the free induction decay signals, without analysing first their derivative. This formalism, which is extremely simple, applies in particular to the modulation of indirect interactions by intermolecular exchange, a case whose usual description is rather complicated.