Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 124, Issue 27, Pages 14541-14549Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.0c01149
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Funding
- Hercules Foundation [AKUL/13/21]
- Flemish Government, Department EWI via the Hermes Fund [AH.2016.134]
- Flemish Government
- European Research Council under the European Union [834134]
- Fonds Wetenschappelijk Onderzoek
- European Research Council (ERC) [834134] Funding Source: European Research Council (ERC)
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Efficient, room temperature hyperpolarization of exchangeable solvent protons combining parahydrogen (p-H-2), aminopropyldiethoxymethylsilane (APDMS), and IrCl(COD)-(IMes) to generate an active aminosilane-iridium complex broadens the capabilities of signal amplification by reversible exchange (SABRE)-type hyperpolarization of protons. A primary pool of hyperpolarized exchangeable protons transfers its hyperpolarization to cosolutes with labile protons, partly overcoming the catalytic specificity of SABRE-type spin-transfer catalysis. The silane functionality of APDMS appears to be crucial to its improvement. Its role is unprecedented in p-H-2-based hyperpolarization of nuclear spins and promises to broaden its applicability of ultrasensitive solution-state NMR spectroscopy for the detection and elucidation of molecular behavior, at concentrations undetectable by conventional NMR spectroscopy.
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