Stark effects bn the phosphorescence spectra of p-benzoquinone have been studied ;n nnphtbalcne crystals at temperatures between 1.7 and 30 K. The exDerimenta1 data establish that \*be band spiitting of 24 cm-t arises from a double mini-\* mum potential in the Tr state.
Stark effects on the low energy electronic states of p-benzoquinone single crystals
โ Scribed by R.H. Hoschstrasser; L.W. Johnson; H.P. Tromsdorff
- Publisher
- Elsevier Science
- Year
- 1973
- Tongue
- English
- Weight
- 406 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0009-2614
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The results of polarized Stark effect absorption esperimcnts on the lower triplet states ofp-benzoquinone (PBQ)-h4 and -dq in single crystals at 1.8"K are reported. These measurements give strong support for the assignment of the lowest triplet state as triplet 3B transition at 18602.8 cm-' ,g (nn\*
The single crystal absorption spectra of p-benzoquinonc and toluquinone have been observed at 4.2OK for three perpendicular directions of polarization. The electronic otQins of the two n-n\* transitions are located; their separation amounts to 255 cm-\* inp-benzoquinone and 560 cm-l in toluquinone.