Communications
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pulse. 1D and 2D spectra were recorded with 1 scan and 4 scans
per increment. For the first example studied we acquired 128 NUS
points, and for the second 300 NUS points, while the maximum
allowed increment in the NUS schedule was 128 for both. For the
single spectrum reconstruction we used 32 NUS points (25 percent
of a full grid). The repetition time between each scan was 2.2
seconds for the first example and 2.0 seconds for the second
example. The chemical shift scale in all experiments was referenced
to the peak of methanol at 3.34 ppm. We modified the DQF-COSY
pulse sequence available in the Magritek Spinsolve Expert operat-
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seventh-order polynomial fitting of a signal enhancement curve,
selective weighting of 2D data for t1-noise artifacts reduction and
integration of 1D and 2D peaks in a MATLAB R2013b. The
description of a pulse sequence, macro for acquisition and code for
selective weighting can be found in ESI.
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The authors would like to thank the National Science Centre of
Poland for support us with the grants OPUS 11 (2016/21/B/ST4/
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Conflict of Interest
The authors declare no conflict of interest.
Keywords: parahydrogen-induced polarization
NMR · non-uniform sampling · reaction monitoring
·
benchtop
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Manuscript received: December 27, 2018
Revised manuscript received: January 21, 2019
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