期刊
JOURNAL OF MAGNETIC RESONANCE
卷 209, 期 2, 页码 315-322出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jmr.2011.01.030
关键词
Nuclear magnetic resonance; J(T)-resolved spectrum; SERFph experiment; G-SERF experiment; Pulsed field gradient; Frequency sweep; Spatial frequency encoding; Parallel acquisition; Enantiomeric discrimination; Residual dipolar couplings; Chirality; PBLG
The application of the G-SERFph pulse sequence is presented on enantiomeric mixtures dissolved in a chiral liquid crystal. It aims at editing, within one single 2D spectrum, every proton coupling which is experienced by a given proton site in the molecule, and leads to real phased T-edited spectroscopy (T = J + 2D). This NMR experiment is based on the combination of homonuclear semi-selective refocusing techniques with a spatial frequency encoding of the sample. This approach, which consists in handling selectively each coupling in separate cross sections of the sample, is applied to the visualization of enantiomers dissolved in a chiral liquid crystalline phase. Advantages and limits of this methodology are widely discussed. (C) 2011 Elsevier Inc. All rights reserved.
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