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Single‐Scan Multidimensional NMR Analysis of Mixtures at Sub‐Millimolar Concentrations by using SABRE Hyperpolarization
Author(s) -
Daniele Valeria,
Legrand FrançoisXavier,
Berthault Patrick,
Dumez JeanNicolas,
Huber Gaspard
Publication year - 2015
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201500535
Subject(s) - hyperpolarization (physics) , spin isomers of hydrogen , chemistry , nmr spectra database , spectral line , deuterium , analytical chemistry (journal) , nuclear magnetic resonance spectroscopy , two dimensional nuclear magnetic resonance spectroscopy , nuclear magnetic resonance , hydrogen , stereochemistry , organic chemistry , atomic physics , physics , astronomy
Signal amplification by reversible exchange (SABRE) is a promising method to increase the sensitivity of nuclear magnetic resonance (NMR) experiments. However, SABRE‐enhanced 1 H NMR signals are short lived, and SABRE is often used to record 1D NMR spectra only. When the sample of interest is a complex mixture, this results in severe overlaps for 1 H spectra. In addition, the use of a co‐substrate, whose signals may obscure the 1 H spectra, is currently the most efficient way to lower the detection limit of SABRE experiments. Here, we describe an approach to obtain clean, SABRE‐hyperpolarized 2D 1 H NMR spectra of mixtures of small molecules at sub‐millimolar concentrations in a single scan. The method relies on the use of para ‐hydrogen together with a deuterated co‐substrate for hyperpolarization and ultrafast 2D NMR for acquisition. It is applicable to all substrates that can be polarized with SABRE.