RESEARCH AND REPORTS ON PHOTOCHROMIC MATERIALS WHICH MAY BE USED AS EYE PROTECTIVE DEVICES

Abstract

Studies of the thermal switching properties 5',7'-dichloro-6'- nitroindolinobenzospiropyran are completed. Rate constants and equilibrium constants are obtained for all processes taking place in both ethanol and toluene over a temperature range from 0 C to 60 C. The thermo dynamic parameters for these processes are calculated. Phenmenological equations describing photochemical switching processes of this compound are derived and appear verified by experimental data. True quantum efficiencies for both opening and closing processes of the spiropyran ring obtained. The photochemical, thermal and spectral properties of seven other photochromic compounds are investigated in toluene solutions at 20 C. There appears to be a considerable variance in important parameters among the different compounds.

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Document Details

Document Type
Technical Report
Publication Date
Apr 30, 1963
Accession Number
AD0427601

Entities

People

  • Alan J. Kresch
  • J. E. Taylor
  • Richard E. Bowman
  • Richard E. Fox

Organizations

  • NCR Corporation

Tags

Communities of Interest

  • Biomedical
  • Cyber
  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Absorption Spectra
  • Alcohols
  • Anhydrides
  • Arrhenius Equation
  • Electromagnetic Radiation
  • Flash Lamps
  • Heat Of Reaction
  • Infrared Spectra
  • Light Sources
  • Materials
  • Measurement
  • Melting Point
  • Photochromic Materials
  • Quantum Yields
  • Scattering
  • Ultraviolet Radiation
  • Visible Spectra

Readers

  • Chemistry (specifically Chemical Fluorescence)
  • Organic Chemistry
  • Theoretical Analysis.

Technology Areas

  • Quantum Computing