Photochemical pump and NMR probe to monitor the formation and kinetics of hyperpolarized metal dihydrides.

ABSTRACT: On reaction of IrI(CO)(PPh₃)₂1 with para-hydrogen (p-H₂), Ir(H)₂I(CO)(PPh₃)₂2 is formed which exhibits strongly enhanced ¹H NMR signals for its hydride resonances. Complex 2 also shows similar enhancement of its NMR spectra when it is irradiated under p-H₂. We report the use of this photochemical reactivity to measure the kinetics of H₂ addition by laser-synchronized reactions in conjunction with NMR. The single laser pulse promotes the reductive elimination of H₂ from Ir(H)₂I(CO)(PPh₃)₂2 in C₆D₆ solution to form the 16-electron precursor 1, back reaction with p-H₂

SUBMITTER: Procacci B 

PROVIDER: S-EPMC5363785 | biostudies-literature | 2016 Dec

REPOSITORIES: biostudies-literature