期刊
CHEMPHYSCHEM
卷 16, 期 5, 页码 1079-1082出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cphc.201402792
关键词
analytical methods; broadband decoupling; homonuclear scalar couplings; NMR spectroscopy; pure shift spectra
资金
- Science and Engineering Research Board, Department of Science and Technology, New Delhi [SR/S1/PC-42/2011]
We report a novel 1D J-edited pure shift NMR experiment (J-PSHIFT) that was constructed from a pseudo 2D experiment for the direct measurement of proton-proton scalar couplings. The experiment gives homonuclear broad-band H-1-decoupled H-1 NMR spectra, which provide a single peak for chemically distinct protons, and only retain the homonuclear-scalar-coupled doublet pattern at the chemical-shift positions of the protons in the coupled network of a specific proton. This permits the direct and unambiguous measurement of the magnitudes of the couplings. The incorporation of a 1D selective correlation spectroscopy (COSY)/ total correlation spectroscopy (TOCSY) block in lieu of the initial selective pulse, results in the exclusive detection of the correlated spectrum of a specific proton.
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