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Updated: May 29, 2026

Spin Saturation Transfer Difference NMR (SSTD NMR): A New Tool to Obtain Kinetic Parameters of Chemical Exchange Processes
Published on: November 12, 2016
Longitudinal exchange: an alternative strategy towards quantification of dynamics parameters in ZZ exchange
Karin Kloiber1, Romana Spitzer, Sarina Grutsch
1Institute of Organic Chemistry, University of Innsbruck, Innrain 52a, 6020 Innsbruck, Austria.
Abstract:
Longitudinal exchange experiments facilitate the quantification of the rates of interconversion between the exchanging species, along with their longitudinal relaxation rates, by analyzing the time-dependence of direct correlation and exchange cross peaks. Here we present a simple and robust alternative to this strategy, which is based on the combination of two complementary experiments, one with and one without resolving exchange cross peaks. We show that by combining the two data sets systematic errors that are caused by differential line-broadening of the exchanging species are avoided and reliable quantification of kinetic and relaxation parameters in the presence of additional conformational exchange on the ms-micros time scale is possible. The strategy is applied to a bistable DNA oligomer that displays different line-broadening in the two exchanging species.
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