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 language | English |
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Pages (from-to) | 5324-5327 |
Number of pages | 4 |
Journal | Journal of the American Chemical Society |
Volume | 116 |
Issue number | 12 |
DOIs | |
Publication status | Published - 1994 Jun 1 |
ASJC Scopus subject areas
- Catalysis
- Chemistry(all)
- Biochemistry
- Colloid and Surface Chemistry