Literature DB >> 15253305

Approximate solutions of the Bloch-McConnell equations for two-site chemical exchange.

Daniel Abergel1, Arthur G Palmer.   

Abstract

Approximate formulas for the transverse-relaxation rate constant and resonance frequency have been derived for nuclear spins subject to two-site chemical exchange. The new results are more accurate than previous approximations when chemical exchange does not approach the fast-exchange limit or when site populations are not highly asymmetric. Results are derived from an effective average evolution operator that contains contributions from both exact eigenvalues of the Bloch-McConnell equations. These expressions are useful for interpretation of chemical exchange processes in NMR spectroscopy.

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Year:  2004        PMID： 15253305     DOI： 10.1002/cphc.200301051

Source DB:  PubMed          Journal:  Chemphyschem        ISSN： 1439-4235            Impact factor:   3.102


  8 in total

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  8 in total

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