H-1-H-1 double-quantum CRAMPS NMR at very-fast MAS (nu(R)=35 kHz): A resolution enhancement method to probe H-1-H-1 proximities in solids


A High-resolution two-dimensional (2D) H-1 double-quantum (DQ) homonuclear recoupling experiments, combined with smooth amplitude-modulation (SAM) homonuclear decoupling is presented. The experiment affords highly resolved and clean H-1 DQ-SQ 2D spectra at very-fast MAS rates (nu(R) = 35 kHz). The method is well suited to probe H-1-H-1 distances in powdered solids and demonstrations are applied on a NaH2PO4 powdered sample, an inorganic compound having hydrogen bonding networks. (C) 2008 Elsevier Inc. All rights reserved.



subject category

Biochemistry & Molecular Biology; Physics; Spectroscopy


Mafra, L; Gomes, JRB; Trebosc, J; Rocha, J; Amoureux, JP

our authors


The authors are grateful to FCT for funding through the PESSOA programme involving a luso-french integrated action (proc.degrees 4.1.1). The University of Aveiro (CICECO) and the University of Lille are also thanked for support and funding. JPA and JT would like to thank Region Nord/Pas de Calais, Europe (FEDER), USTL, FR-3950, ENSCL, ANR NT05-2-41632, and the Bruker Company for funding.

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