Frequency-selective measurement of heteronuclear scalar couplings in solid-state NMR |
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| Institution: | 1. LCPS, universite de Lille-1, Villeneuve d''Ascq, 59652, France;2. Ames Laboratory, Iowa State University, Ames, IA 50011, USA;1. Division of Forest and Biomaterials Science, Kyoto University, Kyoto 606-8502, Japan;2. National Institute for Materials Science, Tsukuba, Ibaraki 305-0003, Japan;1. Department of Chemistry, University of Sistan and Baluchestan, Zahedan, Iran;2. Universitat Potsdam, Karl-Liebknecht-Strasse 24-25, D-14476, Potsdam (Golm), Germany;1. Coordinador Nacional del Grupo de Urología Oncológica de la Asociación Española de Urología;2. Servicio de Urología, Hospital Universitario de Jerez de la Frontera, Jerez de la Frontera, Cádiz, España;1. TIFR Centre for Interdisciplinary Sciences, Tata Institute of Fundamental Research, 21 Brundavan Colony, Narsingi, Hyderabad 500 075, India;2. Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400005, India |
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| 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. |
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