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Structure de la transition électronique pure n-π* 1B 2g ← 1Ag de la p-benzoquinone en phase monocristalline

By J.P. Galaup and H.P. Trommsdorff

Abstract

The structure of the origin band of the n-π* 1B 2g ← 1Ag transition has been measured by absorption at 4.2 °K using single crystals of p-benzoquinone-h4, -d 4 and isotopically mixed crystals. The pure electronic transition produces the first component, which appears as a magnetic dipole transition. The second component is a false crystal induced origine. The excitonic splitting of the bands is shown to be not greater than 0.3 cm-1.On analyse la structure de la bande origine de la transition n-π* 1B2g ← 1A g obtenue en absorption et à 4,2 °K pour des monocristaux de p-benzoquinone, hydrogénés, deutériés et isotopiquement mixtes. La transition électronique pure donne naissance, en tant que transition dipolaire magnétique, à la première composante. La deuxième composante est une fausse origine induite par le cristal. On montre que le dédoublement excitonique des bandes spectrales est au plus égal à 0,3 cm-1

Publisher: 'EDP Sciences'
Year: 1972
DOI identifier: 10.1051/jphys:019720033011-120106700
OAI identifier: oai:edpsciences.org:dkey/10.1051/jphys:019720033011-120106700
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