NMR SLIC Sensing of Hydrogenation Reactions Using Parahydrogen in Low Magnetic Fields.

ABSTRACT: Parahydrogen-induced polarization (PHIP) is an NMR hyperpolarization technique that increases nuclear spin polarization by orders of magnitude, and it is particularly well-suited to study hydrogenation reactions. However, the use of high-field NMR spectroscopy is not always possible, especially in the context of potential industrial-scale reactor applications. On the other hand, the direct low-field NMR detection of reaction products with enhanced nuclear spin polarization is challenging due to near complete signal cancellation from nascent parahydrogen protons. We show that hydrogenation products prepared by PHIP can be irradiated with weak (on the order of spin-spin couplings of a few hertz) alternating magnetic field (called Spin-Lock Induced Crossing or SLIC) and consequently efficient

SUBMITTER: Barskiy DA 

PROVIDER: S-EPMC5204359 | biostudies-literature | 2016 Dec

REPOSITORIES: biostudies-literature