ODMR and optical investigation of the lowest triplet state of thioxanthone
β Scribed by Hans J. Griesser; Richard Bramley
- Publisher
- Elsevier Science
- Year
- 1982
- Tongue
- English
- Weight
- 456 KB
- Volume
- 86
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
β¦ Synopsis
I Highly resolved phosphorcsccncc and optical-microwave doublcrcsonancc spectra of thio\anthonc xc rcportcd. In contrast to related molecules, not only thcz sublevel, but also they sublevel tirries substanhal oscillator strength, where as intersystcm crossing still is highly selective, rmching the t sublevel only. A new rcro-field resonance assibnmcnt IS given.
π SIMILAR VOLUMES
The lowest excited triplet state of all-trans oligothiophenes T, (n = 2... 5), 9-anthryl-oligothiophenes A-T~ (n = 1 ... 3) and 9-anthryl-bithienylpyridine A-T2-Py in the crystalline phase has been investigated by delayed fluorescence detected high resolution photoexcitation spectroscopy. For the T~
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
X simple mccbanbm for tbc broaicnin~ of optic~t and ODOR kmsitions ofgucst molccuks in botb Iatticcs is prorided. Xccording lo this mwIxmism the broadrning rcsuhs from the ~QII~~O!II spin-orbital intcmctions caused by electronic cncrgy fluctuations ~inh~mo~cnrous) in the sin;Ict and triplet st.Hrks.
A phosphorescence line-narrowing technique involving direct quartet ground state to doublet excited state pumping, is used to resolve completely optical-Zeeman components at field strengths compatible with Q-band EPR spectroscopy. By incorporating this technique, ODMR of the lowest doublet excited s