Lesage, AEmsley, L2015-01-082015-01-082015-01-08200110.1006/jmre.2000.2249https://infoscience.epfl.ch/handle/20.500.14299/110131WOS:000167251400025A new through-bond carbon-proton correlation technique, the MAS-J-HSQC experiment, is described for solid-state NMR. This new pulse scheme is compared experimentally with the previously proposed MAS-J-HMQC experiment in terms of proton resolution on a model sample of powdered L-alanine. We show that for natural abundance compounds, the MAS-J-HMQC and MAS-J-HSQC experiments give about the same proton resolution, whereas, for C-13-labeled materials, narrower proton linewidths are obtained with the MAS-J-HSQC experiment. In addition we show that in scalar as well as in dipolar heteronuclear shift correlation experiments, when the proton chemical shift is encoded by the evolution of a single-quantum coherence, the proton resolution can be enhanced by simply adding a 180 degrees carbon pulse in the middle of the t(1) evolution time. (C) 2001 Academic Press.through-bond spectroscopyheteronuclear correlation methodsscalar couplingshomonuclear decouplingtext::journal::journal article::research article