Improvement of spectral editing in solids: A sequence for obtaining (13)CH + (13)CH(2)-only (13)C spectra
An improved spectral editing method for solids is described which allows one to obtain a set of subspectra in roughly two-thirds the amount of time as our original CPPI editing method for the same signal to noise. This improvement is afforded by a new pulse sequence that is used to acquire a (13)CH + (13)CH(2) spectrum which has very little (13)CH(3) or nonprotonated carbon contamination. By using this new sequence the (13)CH-only subspectrum is obtained much more efficiently. Criteria for optimizing the signal to noise in the edited subspectra are discussed. Copyright 2000 Academic Press.
Burns
ST
Department of Chemistry, Yale University, 350 Edwards Street, New Haven, Connecticut, 06511, USA.
Wu
X
Zilm
KW