A role for low concentration reaction intermediates in the signal amplification by reversible exchange process revealed by theory and experiment

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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 allows 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.
Original languageEnglish
Article numberCP-COM-11-2019-006386.R1
Pages (from-to)5033-5037
Number of pages5
JournalPhysical chemistry chemical physics : PCCP
Issue number9
Publication statusPublished - 18 Feb 2020

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