Triple-quantum correlation NMR experiments in solids using J-couplings

• DOI: 10.1016/j.jmr.2005.11.002
• Publication Date: 2005-11-23T12:15:10Z
• Authors: Franck Fayon; Claire Roiland; Lyndon Emsley; Dominique Massiot
• Keywords: J-coupling; Carbon Isotopes; Alanine; Magnetic Resonance Spectroscopy; Triple-quantum coherence; [CHIM.MATE]Chemical Sciences/Material chemistry; 02 engineering and technology; NMR; triple-quantum coherence; Magic-angle-spinning; Glass; 0210 nano-technology; magic-angle-spinning; glass

We show that triple-quantum-single-quantum (TQ-SQ) correlation spectra of crystalline and disordered solids can be obtained under MAS using pulse sequences based on through-bond J-couplings. The feasibility of the experiments in coupled spin-1/2 systems is demonstrated for fully 13C-labelled L-alanine and Pb3P4O13 crystalline compounds, considered as model three-spin and four-spin systems, respectively. In the case of phosphate glasses, we show that the obtained TQ-SQ correlation spectra provide an improved description of the glass forming network connectivities and of the chain length distribution in the disordered network.