Photobleaching of xanthene dyes in a poly(vinyl alcohol) matrix |
| |
| Authors: | G Manivannan P Leclere S Semal R Changkakoti Y Renotte Y Lion R A Lessard |
| |
| Institution: | (1) Centre d'Optique, Photonique et Laser (COPL), Université Laval, Pavilion Vachon, Cité Universitaire, G1K 7P4 Québec, Canada;(2) Hololab, Institut de Physique, Bât. B5, Université de Liège, Sart-Tilman, B-4000 Liége 1, Belgium |
| |
| Abstract: | Photobleaching of three different xanthene dyes namely, Erythrosin B (ERB), Eosin Y (EOY) and Rose Bengal (ROB) in Poly(Vinyl Alcohol) (PVA) matrix has been studied. Quantum yield values of photobleaching using an argon-ion laser (514.5 nm) were determined in presence of an electron donor (TriEthAnolamine, TEA) and/or Cr(VI). Evaluated quantum yield values suggest that erythrosin B undergoes faster photobleaching than eosin Y or rose bengal in presence of TEA. Presence of Cr(VI) in addition to TEA drastically decreases the quantum yield. Possible reaction pathways of photobleaching are discussed. |
| |
| Keywords: | 42 70 82 80 82 50 |
| 本文献已被 SpringerLink 等数据库收录！ |
|
