Resolution and sensitivity aspects of ultrafast J-resolved 2D NMR spectra.
Recent ultrafast techniques enable nD NMR spectra to be obtained in a single scan. However, resolution enhancement in the ultrafast domain leads to important sensitivity losses and lineshape distortions. In order to understand better resolution and spatial encoding aspects of continuous phase-encoding schemes, a theoretical and experimental comparison of different excitation patterns is carried out. Molecular diffusion appears to be the main cause of signal-to-noise ratio decrease, and a multi-echo excitation scheme is proposed to limit its effects when a good resolution is needed. Results obtained on 2D J-resolved spectra are presented.
Giraudeau
Patrick
P
Centre National de la Recherche Scientifique, Laboratoire d'Analyse Isotopique et Electrochimique de Métabolismes, Université de Nantes, UMR 6006, 2 rue de la Houssinière, Nantes Cedex 03, France. patrick.giraudeau@univ-nantes.fr
Akoka
Serge
S
D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D011422:Propionates / Q000737:chemistry; D012680:Sensitivity and Specificity; D013696:Temperature
D011422:Propionates; C035776:3-bromopropionic acid