Fluorescence of Polyureas Based on 1,5-Naphthalene Diisocyanate.

Abstract

Polyureas based on 1,5-naphthalene diisocyanate (NDI) form intramolecular excimers in dilute solution. The excimer formation is enhanced in benzene which is a relatively poor solvent for NDI based polyureas. Photolysis in dimethyl formamide solution results in a decrease in the overall intensity and a shift to the red, due most likely to photo-Fries product formation. Excimer fluorescence in the polyurea films is directly dependent on the nature of the diamine reacted with NDI. The excimer fluorescence is particularly strong for the polyurea films based on NDI and 1,12-diaminododecane.

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Document Details

Document Type
Technical Report
Publication Date
Jul 29, 1987
Accession Number
ADA183325

Entities

People

  • Charles E. Hoyle
  • Cheng Chang

Organizations

  • University of Southern Mississippi

Tags

DTIC Thesaurus Topics

  • Chemistry
  • Classification
  • Elements
  • Emission
  • Emission Spectra
  • Fluorescence
  • Macromolecules
  • Military Research
  • Mississippi
  • Naphthalenes
  • Polymers
  • Polyurethanes
  • Security
  • Spectra
  • Steady State
  • United States
  • Universities

Fields of Study

  • Chemistry

Readers

  • Molecular Photonics/Laser Physics
  • Organic Chemistry
  • Surface Coatings Technology.