Molecular Motion and Energy Migration in Polymers.
Abstract
In this phase of the work attention has been concentrated upon the technique of time-resolved fluorescence anisotropy, in which the time dependence of the anistropy r(t), can in principle be used to monitor molecular motion. At the outset of this work, a study of the literature revealed many unsatisfactory features. There appeared to be no general agreement upon how properly to carry out the experiment, and interpretation was difficult. Much of the work described here consists of a critical evaluation of methods and applications to two polymers systems in solution, poly (methyl methacrylate) PMMA covalently labelled with poly (1-vinyl naphthalene) and poly (acenaphtylene) respectively, shown below. Anistropy is a more useful parameter than a degree of polarization in defining order and motion in molecular systems in that for a fluorophore which decays exponentially with a single component.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1983
- Accession Number
- ADA187149
Entities
People
- David F. Phillips
Organizations
- Royal Institution