期刊
JOURNAL OF MAGNETIC RESONANCE
卷 168, 期 2, 页码 327-335出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jmr.2004.03.017
关键词
UC2QF COSY; solid-state NMR; scalar-coupling-driven correlation; through-bond correlation; natural abundance C-13 correlation
We detail the uniform-sign cross-peak double-quantum-filtered correlation spectroscopy (UC2QF COSY) experiment, a new through-bond correlation method for disordered solids. This experiment is a refocused version of the popular double-quantum-filtered correlation spectroscopy experiment in liquids. Its key feature is that it provides in-phase and doubly absorptive line shapes, which renders it robust for chemical shift correlation in solids. Both theory and experiment point to distinct advantages of this protocol, which are illustrated by several experiments under challenging conditions, including fast magic-angle spinning (30kHz), anisotropic molecular motion, and C-13 correlation spectroscopy at the natural abundance isotope level. (C) 2004 Elsevier Inc. All rights reserved.
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