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Observation of two n-π singlet states in the single crystal absorption spectrum of p-benzoquinone and toluquinone

✍ Scribed by H.P. Trommsdorff

Publisher
Elsevier Science
Year
1971
Tongue
English
Weight
411 KB
Volume
10
Category
Article
ISSN
0009-2614

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✦ Synopsis

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. The assignment of the triplet states is discussed in view of these findings.

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✍ H.P. Trommsdorff 📂 Article 📅 1967 🏛 Elsevier Science 🌐 English ⚖ 271 KB

The singlet-triplet absorption spectrum of p-Benzoquinone single crystals at 200K and 4.2oK as well as the Zeeman splitting of some of its bands is reported and discussed. The pure electronic transition is shown to be located at 18619.5 cm-1 with 9Au symmetry in the excited state. The singlet-triple