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Broadband proton‐decoupled proton spectra
Author(s) -
Pell Andrew J.,
Edden Richard A. E.,
Keeler James
Publication year - 2007
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.1966
Subject(s) - chemistry , proton , spectral line , diagonal , spectrum (functional analysis) , relaxation (psychology) , projection (relational algebra) , analytical chemistry (journal) , absorption spectroscopy , diffusion , broadband , computational physics , spectroscopy , sensitivity (control systems) , nuclear magnetic resonance , optics , physics , nuclear physics , algorithm , quantum mechanics , psychology , social psychology , geometry , mathematics , chromatography , electronic engineering , computer science , engineering
We present a new method for recording broadband proton‐decoupled proton spectra with absorption mode lineshapes and substantially correct integrals; in both these respects, the new method has significant advantages over conventional J ‐spectroscopy. In our approach, the decoupled spectrum is simply obtained from the 45° projection of the diagonal‐peak multiplets of an anti z ‐COSY spectrum. This method is straightforward to apply, and does not require any unusual data processing. However, there is a significant reduction in sensitivity when compared to a conventional proton spectrum. The method is demonstrated for typical medium‐sized molecules, and it is also shown how such a decoupled spectrum can be used to advantage in measurements of diffusion constants (DOSY), the measurement of relaxation parameters, and the analysis of complex mixtures. Copyright © 2007 John Wiley & Sons, Ltd.