Quantum treatment of intermolecular multiple-quantum coherences with intramolecular J coupling in solution NMR.

Published

Journal Article

A recently introduced density matrix picture for dipolar effects in solution NMR (1996, J. Chem. Phys. 105, 874) gave complete solutions for intermolecular multiple-quantum coherences for single-component samples without scalar couplings. This paper, for the first time, shows that this quantum picture can lead to explicit signal expressions for multicomponent samples of molecules with internal scalar couplings (here assumed to generate a first-order spectrum) and long-range dipolar couplings. Experimental observation of a triplet in the indirectly detected dimension for a heteronuclear CRAZED sequence (13CHCl3 sample, ZQ or 2Q coherences) gives clear evidence that the coupling is due to the intermolecular dipolar coupling. We also make comparisons with classical pictures which introduce the dipolar demagnetization field in multicomponent spin systems.

Full Text

Duke Authors

Cited Authors

  • Ahn, S; Warren, WS; Lee, S

Published Date

  • October 1997

Published In

Volume / Issue

  • 128 / 2

Start / End Page

  • 114 - 129

PubMed ID

  • 9356265

Pubmed Central ID

  • 9356265

Electronic International Standard Serial Number (EISSN)

  • 1096-0856

International Standard Serial Number (ISSN)

  • 1090-7807

Digital Object Identifier (DOI)

  • 10.1006/jmre.1997.1226

Language

  • eng