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Manifestations of Slow Site Exchange Processes in Solution NMR: A Continuous Gaussian Exchange Model by J.Michael Schurr; Bryant S. Fujimoto; R. Diaz; Bruce H. Robinson is a Chemistry article available to read on EtoBox.

What is Manifestations of Slow Site Exchange Processes in Solution NMR: A Continuous Gaussian Exchange Model about?

The effects of site exchange due to slow conformational changes in rapidly rotating molecules in solution are examined in detail. Significant gaps in the currently available theory are filled. The effects of site exchange on the lineshape, decay of a simple spinecho, decay of the even echoes in a Carr-Purcell-Meiboom-Gill (CPMG) pulse-sequence, and decay of the transverse magnetization in a resonant spin-locking field are investigated. Both trajectory and stochastic operator approaches are formulated and shown to be completely equivalent whenever the dynamics of population transfers among the inequivalent sites is governed by either a stationary or a nonstationary Markov process. A nonstationary Markov process may result from Brownian dynamics (a stationary Markov process) in a larger conformational space that contains the subspace of inequivalent sites. A continuous Gaussian exchange model is formulated in which a nucleus undergoes continuous one-dimensional motion in a harmonic potential well that is located in a linear chemical shift gradient. The effects of this Gaussian exchange model on the lineshape, simple spin-echo decay, and decay of the even echoes of a CPMG pulse train

Who reads Manifestations of Slow Site Exchange Processes in Solution NMR: A Continuous Gaussian Exchange Model?

Author

J.Michael Schurr; Bryant S. Fujimoto; R. Diaz; Bruce H. Robinson

Publisher

Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV (ISSN 1090-7807)

Published

1999

Language

EN

Field

Chemistry (Physical Sciences)