Spin Polarization Conservation during Intramolecular Triplet-Triplet Energy Transfer Studied by Time-Resolved EPR Spectroscopy

Kimio Akiyama, Shozo Tero-Kubota, Tadaaki Ikoma, Yusaku Ikegami

Research output: Contribution to journalArticlepeer-review

44 Citations (Scopus)

Abstract

Transient triplet EPR spectra of two types of spirans, spiro[9,10-dihydro-9-oxoanthracene-10,2'-benz[f]-indan] and spiro[9,10-dihydro-9-oxoanthracene-10,2'-3H-phenalene], were measured in a glassy matrix at 77 K. Spin polarization conservation during the intramolecular triplet-triplet energy-transfer process was observed. The results clearly indicate that spin orientation is conserved in the molecular frame in the presence of an external magnetic field and that the high-field approximation cannot explain the spin polarization pattern observed in the X-band EPR spectra. The results contribute to the understanding of the relaxation processes of the excited states.

Original languageEnglish
Pages (from-to)5324-5327
Number of pages4
JournalJournal of the American Chemical Society
Volume116
Issue number12
DOIs
Publication statusPublished - 1994 Jun 1

ASJC Scopus subject areas

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

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