Počet záznamů: 1

SQSQh: 1H-detected SQ-SQ Experiment for Determination of Signed Silicon-Carbon Coupling Constants

  1. 1.
    0352963 - UCHP-M 2011 RIV GB eng J - Článek v odborném periodiku
    Blechta, Vratislav - Schraml, Jan
    SQSQh: 1H-detected SQ-SQ Experiment for Determination of Signed Silicon-Carbon Coupling Constants.
    Magnetic Resonance in Chemistry. Roč. 48, č. 6 (2010), s. 464-470 ISSN 0749-1581
    Grant CEP: GA AV ČR IAA400720706
    Výzkumný záměr: CEZ:AV0Z40720504
    Klíčová slova: nmr * sqsq sequence * sign of coupling constant
    Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie
    Impakt faktor: 1.247, rok: 2010

    A new variant of SQ-SQ pulse sequence (SQSQh) for relative sign determination and detection of small silicon-carbon couplings over more than one-bond is presented. In the SQSQh sequence proton detection replaces carbon detection used in the original SQ-SQ pulse sequence (SQSQc). The theoretical gain in sensitivity was experimentally tested on two samples (trimelthylsiloxyethane, 1, and 1,2,4-tris(trimethylsiloxy)benzene, 2), the experimentally found gain provided by the SQSQh over the SQSQc method varied between 6 to 8. The method can be applied to linear spin systems, i.e., to systems where the silicon is coupled to the carbon in question and to any hydrogen not necessarily bonded the carbon.
    Trvalý link: http://hdl.handle.net/11104/0192331