Abstract
A new technique is proposed for selective measurement of heteronuclear scalar J couplings between spins in solids. The method, referred to as FS- J-RES (Frequency-Selective- J-RESolved) NMR, uses frequency-selective irradiation at the I (nonobserved) spin frequency to target a specific pair of spins in a multispin system. In addition, the technique provides direct information about the number of identical I spins chemically bonded to the observed S nucleus. A reference spectrum, recorded without irradiating the I spins, accounts for transverse relaxation, pulse imperfections and dephasing due to homonuclear J couplings between S nuclei, which can be simultaneously measured with this method.
Published Version
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