The temperature dependence of the EFR spectrum of triplet excitons in ~thracen~-teiracy~obe~ene cr$%tals reveals 3. fast relaxation between two triplet states separated by 589 + 54 cm -I. The zero-field splitting parameter D is 30% smaller in the upper state, but E remains unchanged. The lifetime of
Zero-field ODMR studies of excited triplets in the B-TCNB crystal
โ Scribed by G. Agostini; D. Carbonera; G. Giacometti; A.L. Maniero; L. Pasimeni
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 547 KB
- Volume
- 167
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
โฆ Synopsis
Localized triplet excitations obtained by trapping of triplet excitons are investigated in the biphenyl (B)-tetracyanobenzene (TCNB) crystal by zero-field ODMR methods at low temperature ( 1.25 K), At high microwave power ( I W) the ODMR spectral lines are structured with new satellite lines appearing at the sides of the central peak due to forbidden transitions. Their analysis allowed us to obtain information on the quadrupole tensor components of the TCNB molecule in its lowest triplet state.
๐ SIMILAR VOLUMES
Second-order "0 (I = 5/2) hyperfme structure has been observed in the zero-field optically-detected magnetic resonance spectrum of the lowest triplet state of benzophenone. A preliminary analysis of these results su=ests that the n electron is highly localized on the oxygn atom. We wish to report t
Recencd 8 June 19S1 ODVR of zero-field transitIons in the tripIet states of naphthakne and quinouline in an argon host are reported. Excitatlon wth ri Hg xc ieads to Imenidths considerably smaller than those obtained for the same molecules dissolved in ~1as.s) matrices. In naphthafene selective lase
Spectral holes were burned in the two main lines of the triplet-triplet 0-0 fluorescence excitation spectrum of 2-naphthylphenylcarbene in n-hexane at 1.8 K. For the line assigned to pseudo-E/trans conformer, the central hole at the frequency of buming light has several narrow components separated b
UPon excitation of a single crystal of CSO in the visible, microwave transitions have been detected optically in zero field. The transitions derive from triplet states and their frequencies verify that these states are delocalized over more than one C6,, molecule, as Previously inferred from EPR exp