Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 55, Issue 3, Pages 1090-1093Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201508691
Keywords
H-1-H-1 couplings; configuration determination; conformation analysis; NMR spectroscopy; structure elucidation
Categories
Funding
- Research Foundation Flanders (FWO-Vlaanderen)
- Engineering and Physical Sciences Research Council [EP/L018500, EP/M013820]
- Engineering and Physical Sciences Research Council [EP/E05899X/1, EP/M013820/1] Funding Source: researchfish
- EPSRC [EP/M013820/1, EP/E05899X/1] Funding Source: UKRI
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Couplings between protons, whether scalar or dipolar, provide a wealth of structural information. Unfortunately, the high number of H-1-H-1 couplings gives rise to complex multiplets and severe overlap in crowded spectra, greatly complicating their measurement. Many different methods exist for disentangling couplings, but none approaches optimum resolution. Here, we present a general new 2D J-resolved method, PSYCHEDELIC, in which all homonuclear couplings are suppressed in F-2, and only the couplings to chosen spins appear, as simple doublets, in F-1. This approaches the theoretical limit for resolving H-1-H-1 couplings, with close to natural linewidths and with only chemical shifts in F-2. With the same high sensitivity and spectral purity as the parent PSYCHE pure shift experiment, PSYCHEDELIC offers a robust method for chemists seeking to exploit couplings for structural, conformational, or stereochemical analyses.
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