Abstract
The fluorescence spectrum of fluorescein dissolved in poly(vinyl alcohol) (PVA) was recorded at various temperatures. These fluorescence spectra indicate that there is an enhancement of the photobleaching process of the dye at T > 350 K. This temperature corresponds to the glassy transition of PVA which involves rupture of hydrogen bonds. The rupture of these bonds has also been followed by near-IR spectroscopy. The coincidence between these temperatures suggests that the glass transition and the enhancement of the photobleaching process are correlated, and that the former is strongly dependent on the mobility of the polymer chains. The determination of this limit temperature is important for technological applications of the PVA-fluorescein system.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Photochemistry & Photobiology, A: Chemistry
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
