title: Reverse detection for spectral width improvements in spatially encoded dimensions of ultrafast two-dimensional NMR spectra.
abstract: Recently, the spatially encoded technique has been broadly used in the fast analyses of chemical systems and real-time detections of chemical reactions. In spatially encoded ultrafast 2D spectra, spectral widths and resolution in spatially encoded dimensions are contradictive, leading to the risk of insufficient spectral widths when providing satisfactory resolution values for all resonances. Here, a method named as reverse detection is proposed to improve the spectral width in the spatially encoded dimension. Experimental results show that spectral width improvements are at least twofold with reverse detection solely, and more improvements can be expected along with the gradient-controlled folding method. The proposed method can be applied to almost any spatially encoded scheme with echo planar spectroscopic imaging--like detection module and may promote wide applications of ultrafast 2D spectroscopy techniques in chemical analyses.
authors.affiliation: Department of Electronic Science, Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance, State Key Laboratory for the Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen, 361005, China.
authors.forename: Zhiliang
authors.initials: Z
authors.lastname: Wei
authors.forename: Jian
authors.initials: J
authors.lastname: Yang
authors.forename: Liangjie
authors.initials: L
authors.lastname: Lin
authors.forename: Guangcao
authors.initials: G
authors.lastname: Liu
authors.forename: Yanqin
authors.initials: Y
authors.lastname: Lin
authors.forename: Zhong
authors.initials: Z
authors.lastname: Chen
keywords: 1H; NMR; reverse detection; spatially encoded; spectral width improvements; ultrafast