The lowest triplet state of azulene- h 8 and azulene- d 8 in liquid solution.
Identifieur interne : 001022 ( Main/Exploration ); précédent : 001021; suivant : 001023The lowest triplet state of azulene- h 8 and azulene- d 8 in liquid solution.
Auteurs : Bernhard Nickel [Allemagne] ; Dieter Klemp [Allemagne]Source :
- Chemical Physics [ 0301-0104 ] ; 1993.
Abstract
In liquid isopentane the lowest triplet (T1) state of azulene-h8 and azulene-d8 can be populated by triplet energy transfer from phenazine. At low temperatures (≲ 150 K) two delayed luminescences are observed: phosphorescence and E-type delayed S1→ S0 fluorescence (EDF) due to thermally activated intersystem crossing (ISC) T1⇝S1. At higher temperature (≳ 200 K) the EDF dominates. The temperature dependence of the EDF is in accord with ISC T1⇝S1 being the only temperature-dependent triplet decay process. Light-atom out-of-plane bending modes are likely to be the promoting modes. The literature on the lowest triplet state of azulene is reviewed.
Url:
DOI: 10.1016/0301-0104(93)87015-F
Affiliations:
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