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

0352963 - ÚCHP 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. E-ISSN 1097-458X
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