Spm Lttttcc reiaxdtmn times of rnetact:iblc trq&!t states in dn org:mic molcfular crystal were mcabured at hq$~ magnetic fields up to energy level splitttngs &E near the Debyc acoustx limit. By an opticai method we Sound that the drrcct-process relaxation of the r?r = +1 Zceman state is domixttcd by
Spin—lattice relaxation in the phosphorescent triplet state of acridine and phenanthrene in zero-magnetic field
✍ Scribed by D.A. Antheunis; B.J. Botter; J. Schmidt; P.J.F. Verbeek; J.H. van der Waals
- Publisher
- Elsevier Science
- Year
- 1975
- Tongue
- English
- Weight
- 338 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
The three spin-lattice relaxation rates for the triplet state of ncridine in zerc-field have been determined in a biphenyl host from 1.7-3.2 K. The mean relaxation rate for the triplet state of phcnanthrene was determined in a biphenyl host from 1.3-13 K Two conclusions of a more general nature emerge: (1) the rchxation amongst the spin Components of a given triplet state in zero-field may be markedly-ulisotiopic; (2) the time SC& on which rclzarion occtss may vary by several orders of magnitude for different molecules.
📜 SIMILAR VOLUMES
It is shown that the spm-spin and spin-lattice relaxation rates in the lowest triplet state of aniline in a p-xylene host crystal are determmed by the presence of a close-lying local phonon state. It is concluded that the motion of the aniline molecule has a highly localised character.
We have measured the spin-lattice relaxation rates in the phosphorescent triplet state To of naphthalene in durene as a function of the &e&on of the magnetic field-The orientational dependence of the reIaxation is explained by thermal activation to a close Iying local phonon state where the spin axe