Frequency-selective measurement of heteronuclear scalar couplings in solid-state NMR

• Published in: Solid state sciences 2004-10, Vol.6 (10), p.1089-1095
• Main Authors: Trébosc, J., Amoureux, J.P., Delevoye, L., Wiench, J.W., Pruski, M.
• Format: Article
• Language: English
• Subjects: Chemical Sciences; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Crystalline state (including molecular motions in solids); Exact sciences and technology; Magnetic resonances and relaxations in condensed matter, mössbauer effect; Nuclear magnetic resonance and relaxation; Other; Physics; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; Theory of crystal structure, crystal symmetry; calculations and modeling
• ISSN: 1293-2558; 1873-3085
• DOI: 10.1016/j.solidstatesciences.2004.04.019

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.