Norcott PL. Benzoquinone Enhances Hyperpolarization of Surface Alcohols with Para-Hydrogen.
J Am Chem Soc 2023;
145:9970-9975. [PMID:
37127286 PMCID:
PMC10176463 DOI:
10.1021/jacs.3c01593]
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Abstract
The nuclear singlet state of H2, para-hydrogen, can be used to increase the measurable signal-to-noise for magnetic resonance techniques─a form of hyperpolarization. Transfer of this polarization from para-hydrogen to alcohols through surface interactions rather than formal hydrogenation has only been demonstrated on heterogeneous catalysts tailored to minimize loss of spin order. Here, we find that a common platinum-on-carbon catalyst is capable of this interaction and that the addition of a benzoquinone significantly increases the signal output of hyperpolarized methanol or water.
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