Recently several investigators reported opti-aZ detection of ESR transitions in phosphoresent triplet states of various molecules [l-3]. he experiments were done by sweeping the magetic field at fixed microwave frequency. In con-;ast with the normal ESR detection method. the Jsorption of microwave p
Optical detection of the zero field splittings in the phosphorescent triplet state of neat SO2 crystals
β Scribed by D.S. Tinti
- Publisher
- Elsevier Science
- Year
- 1971
- Tongue
- English
- Weight
- 396 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
The zero fickl transition energies in the phosphorwcent triplet state of neat SO 2 arc discctly mctsurcd by opticlL detedtion at 1.4"K, leading to LDI = 0.275 cm-' and LEI = 0.01575 cm-' for the usual spin hamiltonian parameters.
Two spin states are found to be active in the phosphorescence with the dominant spin state having a IKetime of 2 msec.
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The phosphorescence spectra, ODMR, and triplet sublc~el kinetics are reported for the thioketoncs, 4H-p\-ran4thionc (Pr) and 2,6dimethyl4H-pyran4thione (DMPT). Extremely large ZFS parameters. D = -24, and -28 cm-'. arc ass@ntld to two distinct trap sites of PT in Jz-pentnne and D = -24 cm-1 for the
We have observed temperaturedependent X-trap phosphorescence in &He crystals doped with CsD6. The observed Xtrap is identified as CeHe which is perturbed by the presence of C6De in a nearest-neighbor crystal site. Zero-field opticalmicrowave double resonance measurements on the X-traps give for the
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Zero-field-splitting parameters D and E for the fullerene GO in its Jahn-Teller distorted triplet state were calculated and compared to recent experimental results. The E value vanishes due to symmetry, while we obtained a non-zero k) value of D = -0.009 cm-' in the Ds distorted lowest triplet state