Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 22, Issue 9, Pages 5033-5037Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9cp06386b
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Funding
- Wellcome Trust [092506, 098335]
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A route to monitor the involvement of less abundant species during the catalytic transfer of hyperpolarisation from parahydrogen into a substrate is detailed. It involves probing how the degree of hyperpolarisation transfer catalysis is affected by the magnetic field experienced by the catalyst during this process as a function of temperature. The resulting data allow the ready differentiation of the roles played by hard to detect and highly reactive complexes, such as [Ir(H)(2)(NHC)(substrate)(2)(methanol)]Cl, from dominant species such as [Ir(H)(2)(NHC)(substrate)(3)]Cl. The difference in behaviour results from changes in the interligand spin-spin coupling network within the active SABRE catalysts.
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