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

Icli S., Anil H., Dindar B., Alankus-Caliskan O., Yayla Y., Doroshenko A., ...More

TURKISH JOURNAL OF CHEMISTRY, vol.24, no.2, pp.199-207, 2000 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 24 Issue: 2
  • Publication Date: 2000
  • Journal Name: TURKISH JOURNAL OF CHEMISTRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Page Numbers: pp.199-207
  • Keywords: fluorescence emission, Styrax officinalis, egonol, benzofuran, fluorescence quantum yields, fluorescence quenching, ELECTRON-TRANSFER
  • Dokuz Eylül University Affiliated: Yes

Abstract

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.