A trnnsicnt absorption is observed in nnthraccne (A/-N, N-diethyianiline (D) sofutions in toiuene excited by the 3371k line of n nitrogen laser. The lifetime of the transient matches that of the fluorescence of the excited (DA) charge transfer complex. The absorption is assigned to a transition from
Absorption spectra of CT complexes in their lowest excited singlet states
β Scribed by R. Potashnik; M. Ottolenghi
- Publisher
- Elsevier Science
- Year
- 1970
- Tongue
- English
- Weight
- 387 KB
- Volume
- 6
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
Excited singlet-singlet absorption spectra of aromatic charge-transfer complexes have been recorded using pulsed-laser excitation. The spectra (obtained for the tetracyanobenzene-toluene, tetracyanobenzene-benzene and pyromellitlcdianhydride-mesitylene systems) are practically identical with those of the negative ions of the corresponding acceptors. The observation is consistent with the charge-transfer character of the excited complexes.
π SIMILAR VOLUMES
New excited singlet-singlet &-St) absorption spectra were observed in the case of TCNB complexes with benzene, toluene as well as mesitylene, pyromellitic dianhydride-toluene complex and p.dicyanobenzene-cr-rnethyInaphthalene complex at room temperature. All spectra can be well reproduced by a super
The excited singlet-singlet absorption spectra of s-tetracyaobenzene (TCNB) complexes with toluene and benzene were observed. The spectra were obtnined using the re-absorption of the CT fluorescence by the fluorescent EDA complexes produced densely by means of the excitation with a giant pulse Iaser
## The resonance coherent antIStokes Raman scatte,mg spectra of chrysene in the fust exctted singlet and triplet state aEe generated The observed differences m wavenumber and mtenslty pomt out a changed molecular structure in the excited electromc states