Nanosecond Laser Photolysis of Opaque Heterogeneous Photosensitizers.

Abstract

Work continues on studies of photophysical and photochemical properties of benzoylated polystyrene (polymer-bound benzophenone). We are able to establish the presence of two transients when these samples are subjected to laser flash photolysis exciting at 354 nm, from the time dependent decrease in diffuse reflectance at different analysing wavelengths. One of these transients is the triplet state of the polymer bound benzophenone which can also be studied in emission which we have been able to do. The other is probably the radical formed by hydrogen abstraction by this triplet state by those photo excited species which are close enough to methylene groups to allow reaction.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1987
Accession Number
ADA191424

Entities

People

  • F. Wilkinson

Organizations

  • Loughborough University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Chemistry
  • Contracts
  • Dielectric Polymers
  • Electron Transfer
  • Energy
  • Energy Transfer
  • Ion Exchange
  • Ion Exchange Resins
  • Ketones
  • Organic Compounds
  • Photolysis
  • Polymers
  • Polystyrenes
  • Reflectance
  • Resins
  • Silica Gels

Readers

  • Chemistry (specifically Chemical Fluorescence)
  • Organic Chemistry
  • Pulsed Power and Plasma Physics.

Technology Areas

  • Directed Energy
  • Directed Energy - Lasers