Transient Absorption Spectroscopy Offers Mechanistic Insights for an Iridium/Nickel-Catalyzed C-O Coupling

Lei Tian, Nicholas A. Till, Bryan Kudisch, David W.C. MacMillan, Gregory D. Scholes

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

We report mechanistic insights into an iridium/nickel photocatalytic C-O cross-coupling reaction from time-resolved spectroscopic studies. Using transient absorption spectroscopy, energy transfer from an iridium photocatalyst to a catalytically relevant Ni(II)(aryl) acetate acceptor was observed. Concentration-dependent lifetime measurements suggest the mechanism of the subsequent reductive elimination is a unimolecular process occurring on the long-lived excited state of the Ni(II) complex. We envision that our study of the productive energy-transfer-mediated pathway would encourage the development of new excited-state reactivities in the field of metallaphotocatalysis that are enabled by light harvesting.

Original languageEnglish (US)
Pages (from-to)4555-4559
Number of pages5
JournalJournal of the American Chemical Society
Volume142
Issue number10
DOIs
StatePublished - Mar 11 2020

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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