Abstract
In order to disentangle the relaxation effects of exciton migration and conformational rearrangement, a comparative study of a polyfluorene derivative and short oligofluorenes is carried out. We probe their long-time time-dependent relaxation in dilute solution using picosecond single photon counting and streak camera techniques. Conformational relaxation is found in oligo- and polyfluorenes. Oligofluorene relaxation is purely conformational: time scales vary between 10 and $300\phantom{\rule{0.3em}{0ex}}\mathrm{ps}$ becoming faster with decreasing chain length and solvent viscosity or increasing temperature. While a rigid ladder-type polymer in solution does not show any picosecond relaxation, polyfluorene in solution exhibits fluorescence dynamics indicating both, conformational relaxation and exciton migration.
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 callSimilar Papers
More From: Physical Review B
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.
