Chemically Induced Dynamic Nuclear Polarization and Exchange Broadening in an Electron-Transfer Reaction

Heinz D. Roth, Angelo A. Lamola

Research output: Contribution to journalArticle

62 Scopus citations

Abstract

The solution photolysis of para, para′-disubstituted benzophenones (1) in the presence of Dabco (2) has been investigated with the help of nmr techniques. During the irradiation, the ketones showed nuclear spin polarization (CIDNP) effects for the ortho (enhanced absorption) and meta protons (net emission). These results are interpreted as evidence for electron transfer from the amine to the excited triplet ketones. Simultaneously, nmr line broadening was observed for 2 and p, p′-dichlorobenzophenone (1e). These phenomena were ascribed to degenerate electron transfer between 2 and its radical cation (4) and between the ketyl radical (3e) and its parent ketone.

Original languageEnglish (US)
Pages (from-to)6270-6275
Number of pages6
JournalJournal of the American Chemical Society
Volume96
Issue number20
DOIs
StatePublished - Jan 1 1974
Externally publishedYes

All Science Journal Classification (ASJC) codes

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

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