Nuclear quadrupole effects on the tnplet-state opircally detected magnetic resonance (ODMR) of molecules having spin I = 1 nuclei have been investigated by theoreucal melhods Beginning W&I an exact dlagonaluanon of the tnpler-state spin Harrultoman, rhese methods have mvolved a systemauc vanallon m
Magnetic resonance studies of optical spin polarization in triplet state anthracene
β Scribed by Richard H. Clarke
- Publisher
- Elsevier Science
- Year
- 1970
- Tongue
- English
- Weight
- 494 KB
- Volume
- 6
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
EPR studies of the lowest triplet state of anthracene in a phenazine host crystal reveal a non-Boltzmann distribution over the triplet spin levels at zl.5OK. Measurements of the lifetimes for each of the triplet spin states provide information about both intramolecular decny processes and intermolecufar triplet energy transfer mechanisms in the mixed crystal system.
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By magnetic resonance es~criments on the phosphorescing triplet state of biacetyl in a 3-methytpentane glass the zero field splittings and the populating and depopulating rates of the individual triplet spin Ieveis have been me=ured. From these data an assignment of the zero field levels and mechani
Chlorophyll-b in glassy solution has a spin-polarized lowest triplet state at and above 7? K. Ths magnitude of the .).'\_, .: effect is different for MTHF and ethanol as soIvents, in contrast to what is found for the porphin free base. Chloro-\_-phyla-a does not exhibit spa-polar~ation under identi