Turkish Journal of Chemistry
High fluorescence emissions of some natural benzofurane derivatives isolated from Styrax officinalis
Abstract
The fluorescent properties of several natural benzofuran derivatives, egonols, isolated from {\it Styrax officinalis}, were determined. The studied egonol derivatives were found to be effective UV organic luminophores, with quantum yields of near to unity, \( \varphi_{f} \) = 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 4.5$\times$10\( ^{10} \), 2.1$\times$10\( ^\times \) and 5.6$\times$10\( ^{12} \) s\( ^{-1} \)mol\( ^{-1} \), respectively. A strong electron acceptor molecule, tetranitrofluorenone, presented quenching rate of 2.6$\times$10\( ^{11} \) s\( ^{-1} \)mol\( ^{-1} \). It is concluded that the first excited singlet state of egonol molecule is a more efficient electron acceptor.
DOI
-
Keywords
Fluorescence emission, Styrax officinalis, egonol, benzofuran, fluorescence quantum yields, fluorescence quenching.
First Page
199
Last Page
208
Recommended Citation
İÇLİ, S, ANIL, H, DİNDAR, B, ÇALIŞKAN, Ö. A, YAYLA, Y, DOROSHENKO, A. O, & ALP, S (2000). High fluorescence emissions of some natural benzofurane derivatives isolated from Styrax officinalis. Turkish Journal of Chemistry 24 (2): 199-208. https://doi.org/-
