Sıddık İÇLİ, Serap ALP, Bircan DİNDAR, Hüseyin ANIL, Alankuş Özgen ÇALIŞKAN, Yurdanur YAYLA, Andrey O. DOROSHENKO

8396

High fluorescence emissions of some natural benzofurane derivatives isolated from Styrax officinalis

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, \( jf \) = 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\times10\( 10 \), 2.1\times10\( \times \) and 5.6\times10\( 12 \) s\( -1 \)mol\( -1 \), respectively. A strong electron acceptor molecule, tetranitrofluorenone, presented quenching rate of 2.6\times10\( 11 \) s\( -1 \)mol\( -1 \). It is concluded that the first excited singlet state of egonol molecule is a more efficient electron acceptor.

Anahtar Kelimeler:

Fluorescence emission, Styrax officinalis, egonol, benzofuran, fluorescence quantum yields, fluorescence quenching.

High fluorescence emissions of some natural benzofurane derivatives isolated from Styrax officinalis

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, \( jf \) = 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\times10\( 10 \), 2.1\times10\( \times \) and 5.6\times10\( 12 \) s\( -1 \)mol\( -1 \), respectively. A strong electron acceptor molecule, tetranitrofluorenone, presented quenching rate of 2.6\times10\( 11 \) s\( -1 \)mol\( -1 \). It is concluded that the first excited singlet state of egonol molecule is a more efficient electron acceptor.

Keywords:

Fluorescence emission, Styrax officinalis, egonol, benzofuran, fluorescence quantum yields, fluorescence quenching.,

Turkish Journal of Chemistry-Cover

ISSN: 1300-0527
Yayın Aralığı: 6
Yayıncı: TÜBİTAK

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