High fluorescence emissions of some natural benzofurane derivatives isolated from Styrax officinalis
Makaleler > Tam Makale · 2000
Yazarlar: S Icli, H Anil, B Dindar, Özgen ALANKUŞ, Yurdanur AKGÜL, AO Doroshenko, S Alp
TURKISH JOURNAL OF CHEMISTRY, SCI Expanded İndekslerine Giren Dergi, Uluslararası, 2000, cilt 24, ss 199-207
Özet
The fluorescent properties of several natural benzofuran derivatives, egonols, isolated from Styrax officinalis, were determined. The studied egonol derivatives were found to be effective UV organic luminophores, with quantum yields of near to unity, phi(f) = 0.92. The fluorescence quenching experiments with electron donor molecules of aniline, N,N-dimethylaniline and carbazolocarbazole, presented very high efficiency of quenching at above diffusion quenching rates of 4.5x10(10), 2.1x10(x) and 5.6x10(12) s(-1)mol(-1), respectively. A strong electron acceptor molecule, tetranitrofluorenone, presented quenching rate of 2.6x10(11) s(-1)mol(-1). It is concluded that the first excited singlet state of egonol molecule is a more efficient electron acceptor.