Cyclic and Slice-Selective J Cross Polarization for Heteronuclear Editing and Localized NMR |
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| Affiliation: | 1. Tectospin, Institut Lavoisier de Versailles, CNRS UMR 8180, Université de Versailles Saint-Quentin en Yvelines, 45 Avenue des Etats-Unis, 78035 Versailles Cedex, France;2. CNRS, CEMHTI UPR3079, Université d''Orléans, F-45071 Orléans, France;1. Kotelnikov Institute of Radio-engineering and Electronics of RAS, 11-7 Mokhovaya st., Moscow 125009, Russia;2. Department of Physics, Oakland University, 2200 N. Squirrel Rd., Rochester, MI 48309, USA;3. Moscow Institute of Physics and Technology, 9 Instituskij per., Dolgoprudny, 141700, Moscow Region, Russia;4. Adam Mickiewicz University in Poznan, Umultowska 85, Poznan 61-614, Poland;5. Saratov State University, 112 Bol''shaya Kazach''ya, Saratov 410012, Russia |
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| Abstract: | This work has two objectives. First, heteronuclear editing was considered, with particular aim at proton-detected NMR spectroscopy of rare nuclei. The second aspect refers to localized heteronuclear NMR spectroscopy, implying the editing option. The common basis of both techniques is J cross polarization (or coherent rotating-frame polarization transfer). In the presence of magnetic field gradients this process is slice selective and is introduced as a principle for localized liquid-state NMR, particularly of heteronuclear spins. Heteronuclear editing of NMR lines is performed by the aid of a cyclic cross-polarization pathway. Both methods can be combined to a technique for localized proton-detected NMR spectroscopy of rare nuclei. Test experiments demonstrating the slice selectivity of the transfer process and the efficiency of the cyclic cross-polarization editing procedure are reported. Applications to localized homo- or heteronuclear spectroscopy and imaging are discussed. |
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