Abstract
Fluorescence depolarization was monitored by time-correlated single-photon counting in organized monolayers of octadecylrhodamine B (ODRB) in dioleoylphosphatidylcholine (DOL) at air-water interfaces. At low ORDB density, the depolarization was dominated by restricted rotational diffusion. Increases in surface pressure reduced both the angular range and the diffusion constant for rotational motion. At higher ODRB densities, additional depolarization was observed due to electronic excitation transport. A two-dimensional two-particle theory developed by Baumann and Fayer was found to provide an excellent description of the transport dynamics for reduced chromophore densities up to /approximately/ 5.0. The testing of transport theories proves to be relatively insensitive to the orientational distribution assumed for the ODRB transition moments in their two-dimensional systems.
Sign-in/Register to access full text options 
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.
