The structure of low-temperature electronic spectra of benzo[a]phenazine
1981; Elsevier BV; Volume: 59; Issue: 1-2 Linguagem: Inglês
10.1016/0301-0104(81)80095-x
ISSN1873-4421
AutoresKaroly Brenner, Z. Ruziewicz, Georg W. Suter, Urs P. Wild,
Tópico(s)Molecular Junctions and Nanostructures
ResumoA vibrational analysis of the multi-site phosphorescence spectra of benzo[a]phenazine (BPH) in n-hexane and of the single-site phosphorescence spectra obtained by direct T1(π,π*)←So laser excitation in a glassy medium furnished consistent results. Using polarization spectra, the symmetries of fundamentals active in the phosphorescence spectra have been assigned. The BPH molecule occupies in a n-hexane matrix three main sites. The site splitting is much larger in the T1 than in the S1 state. The energy gap between the S2(ππ*) and the S1(nπ*) state is only 650 cm−1. In the interference region between these two slates large intensity differences in the phosphorescence excitation spectra of the individual sites are observed.
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