Uniform-sign cross-peak double-quantum-filtered correlation spectroscopy.
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 (13)C correlation spectroscopy at the natural abundance isotope level.
Mueller
Leonard J
LJ
Department of Chemistry, University of California, Riverside, CA 92521, USA. Leonard.Mueller@ucr.edu
Elliott
Douglas W
DW
Leskowitz
Garett M
GM
Struppe
Jochem
J
Olsen
Ryan A
RA
Kim
Kee-Chan
KC
Reed
Christopher A
CA