An investigation of energy transfer between coumarin 35 and xanthene derivatives in liquid medium

Toprak M., ARK M.

Turkish Journal of Chemistry, vol.34, no.2, pp.285-293, 2010 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 34 Issue: 2
  • Publication Date: 2010
  • Doi Number: 10.3906/kim-0808-40
  • Journal Name: Turkish Journal of Chemistry
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Page Numbers: pp.285-293
  • Keywords: Coumarin 35, Fluorescence energy transfer, Fluorescence intensity quenching, Pyronin compounds
  • Bilecik Şeyh Edebali University Affiliated: No

Abstract

The energy transfer between coumarin 35 (C35) and pyronin compounds, which are xanthene derivatives, i.e. pyronin B (PyB) and pyronin Y (PyY), in methanol was investigated at room temperature by using steady-state absorption, emission, and time-resolved fluorescence spectroscopy. Fluorescence energy transfer rate constants (kT ) and critical radius (Ro) were determined for C35-PyB and C35-PyY molecular pairs in methanol. The obtained values of kT and Ro indicated that the dipole-dipole interaction between C35-PyB and C35-PyY molecular pairs accounted for the energy transfer mechanism. The energy transfer efficiency and the distance between the donor and acceptor (r) were also calculated for donor-acceptor pairs using Förster's theory. © TÜBİTAK.