Spectral and photophysical properties of 9,10-diphenylanthracene in perfluoro-n-hexane: the influence of solute—solvent interactions
1986; Elsevier BV; Volume: 35; Issue: 1 Linguagem: Inglês
10.1016/0047-2670(86)87117-9
ISSN1873-2658
AutoresAndrzej Maciejewski, Ronald P. Steer,
Tópico(s)Chemical Reactions and Mechanisms
ResumoThe photophysical properties of 9,10-diphenylanthracene (DPA) are found to be unusual in perfluoro-n-hexane (PFH) compared with other solvents. Low values of the fluorescence quantum yield, φF = 0.58, and S1 lifetime, τS1 = 6.7 ns, and relatively large shifts in the absorption and emission spectra in PFH are attributable to changes in the electronic energies of DPA which permit an enhancement of the rate of S1 ⇝ T2 relaxation in this solvent. A large value of the intersystem crossing quantum yield in PFH, φISC = 0.35, supports this conclusion.
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