Frontispiece: PSYCHE Pure Shift NMR Spectroscopy
نویسندگان
چکیده
منابع مشابه
Ultraclean pure shift NMR.
"Pure shift" methods can greatly improve the resolution of proton NMR spectra. However, current pure shift spectra show small periodic artefacts that prevent their use for studying dilute mixture components. A new technique, compatible with all current pure shift methods, is presented that suppresses such sidebands to arbitrary order, allowing ultraclean spectra to be obtained.
متن کاملDiastereomeric ratio determination by high sensitivity band-selective pure shift NMR spectroscopy.
An NMR method is reported that allows diastereomeric ratios to be determined even in crowded spectra or where chemical shift differences are small compared to multiplet widths. Band-selective pure shift NMR collapses multiplets to singlets, greatly improving spectral resolution while largely retaining, or even enhancing, signal-to-noise ratio.
متن کاملMeasuring couplings in crowded NMR spectra: pure shift NMR with multiplet analysis.
The PSYCHE method for pure shift NMR is exploited to generate 2D J spectra with full decoupling in one dimension and multiplet structure in the other, allowing spin-spin coupling constants to be measured even in very crowded spectra. Significant improvements over existing techniques are demonstrated for the hormones estradiol and androstenedione.
متن کاملBroadband Homonuclear Decoupling in Heteronuclear Shift Correlation NMR Spectroscopy
Recently, Garbow, Weitekamp, and Pines introduced a new approach to homonuclear broadband decoupling (I). Independently, a closely related experiment has been proposed for semiselective heteronuclear J spectroscopy (2). The two types of experiments have the common feature that all protons which are not directly attached to a 13C nucleus experience an effect as if a nonselective 180” pulse were ...
متن کاملDetection of Potential TNA and RNA Nucleoside Precursors in a Prebiotic Mixture by Pure Shift Diffusion-Ordered NMR Spectroscopy
In the context of prebiotic chemistry, one of the characteristics of mixed nitrogenous-oxygenous chemistry is its propensity to give rise to highly complex reaction mixtures. There is therefore an urgent need to develop improved spectroscopic techniques if onerous chromatographic separations are to be avoided. One potential avenue is the combination of pure shift methodology, in which NMR spect...
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ژورنال
عنوان ژورنال: Chemistry – A European Journal
سال: 2018
ISSN: 0947-6539,1521-3765
DOI: 10.1002/chem.201885361