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119/117/115 Sn low‐abundance single‐transition correlation spectroscopy (LASSY): sensitivity‐enhanced homonuclear correlation experiments for Sn NMR
Author(s) -
George Christy,
Chandrakumar Narayanan
Publication year - 2010
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.2686
Subject(s) - homonuclear molecule , chemistry , spins , pulse sequence , nuclear magnetic resonance spectroscopy , relaxation (psychology) , two dimensional nuclear magnetic resonance spectroscopy , spectroscopy , spectral line , analytical chemistry (journal) , nuclear magnetic resonance , molecular physics , physics , stereochemistry , condensed matter physics , molecule , psychology , social psychology , organic chemistry , quantum mechanics , chromatography , astronomy
We report the implementation of our novel rare‐spin homonuclear correlation experiment, namely, Low‐Abundance Single‐transition correlation SpectroscopY (LASSY), for 119/117/115 Sn NMR at natural abundance. Our pulse sequence results in diagonal suppressed COSY‐style display and outperforms the optimal homonuclear correlation experiment for rare spins, which involves double quantum evolution (INADEQUATE CR). The new experiment maximizes efficiency both in respect of pulse transformations as well as relaxation effects, and gives rise to a simplified two‐dimensional (2D) spectrum with considerably reduced crowding, exhibiting only one transition in each cross peak, instead of four. Performance optimization of LASSY is carried out in light of the relatively ‘large’ line widths typical of Sn NMR in solution state. The superior performance of the sequence is demonstrated on dimeric tetraorganodistannoxane samples. Copyright © 2010 John Wiley & Sons, Ltd.