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Measurement of Long-Range 29Si,13C Spin-Spin Coupling at Natural Abundance

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    0105021 - UCHP-M 20040275 RIV GB eng J - Journal Article
    Blechta, Vratislav - Sýkora, Jan - Schraml, Jan
    Measurement of Long-Range 29Si,13C Spin-Spin Coupling at Natural Abundance.
    [Měření spin-spinových interakcí 29Si,13C přes velké vzdálenosti.]
    Magnetic Resonance in Chemistry. Roč. 42, č. 11 (2004), s. 968-972. ISSN 0749-1581. E-ISSN 1097-458X
    R&D Projects: GA ČR GP203/02/D176; GA ČR GA203/03/1566; GA AV ČR IAA4072005
    Institutional research plan: CEZ:AV0Z4072921
    Keywords : silylated compounds * coupling * NMR
    Subject RIV: CF - Physical ; Theoretical Chemistry
    Impact factor: 1.489, year: 2004

    Schemes for sensitive measurements of spin-spin coupling constants between rare nuclei with low magnetogyric ratios are considered and two combinations of INEPT with gradient versions of (X,Y)HMQC and (X,Y)COSY are suggested as particularly suitable for 29Si,13C couplings. It is demonstrated that the (H,Si)INEPT-(Si,C,Si)gHMQC combination (with 29Si detection) produces excellent results even though it is theoretically inferior to the (H,Si)INEPT-(Si,C)gCOSY combination (with 13C detection.

    Byly vyvinuty dvě metody na měření zmíněných konstant. Obě využívaji přenos polarizace metodou INEPT a dále jsou založeny na pulsních sekvencích (X,Y)HMQC a (X,Y)COSY. Využití obou metod je demosntrováno na praktickém příkladu.
    Permanent Link: http://hdl.handle.net/11104/0012274

     
     
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