Abstract
A photobleaching technique for measuring probe rotational diffusion in supercooled and glassy materials is presented. Rotational correlation times from 10 -2 to 10 +4.5 s have been obtained for tetracene in o-terphenyl (OTP). Relative to the conventional T g for OTP (-30 o C), this corresponds to a temperature range of T g +15 o C to T g -5 o C. These results, combined with nanosecond measurements of anthracene rotation in OTP, are compared to OTP viscosity data. We find that, in contrast to translational diffusion measurements of probes in OTP, rotational diffusion follows the temperature dependence of η/T over the 14 decades of time and viscosity explored
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 callDisclaimer: 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.
