QUENCHING OF THE TRIPLET STATE OF BENZIL BY RARE EARTH CHELATES.

Abstract

Quenching of the triplet state of benzil by rare earth-tris dipivaloylmethane chelates was studied in degassed cyclohexane solutions at 18 C. A spectrophotofluorometer was used for all measurements of phosphorescence intensity. Compounds were chosen such that quenching by electronic energy transfer was not expected. Stern-Volmer graphs were constructed for the observed quenching, and the slopes from these graphs were used to calculate quenching rate constants of the order 10,000,000/M sec. The magnitude of these constants indicates that the quenching is not diffusionally controlled, and that the quenching is the result of enhanced spin-orbit coupling in the presence of the chelate. (Author)

Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1967
Accession Number
AD0821246

Entities

People

  • Duarte Alvaro Lopes

Organizations

  • Air Force Institute of Technology

Tags

DTIC Thesaurus Topics

  • Couplings
  • Cyclic Hydrocarbons
  • Cyclohexanes
  • Energy
  • Energy Transfer
  • Intensity
  • Measurement
  • Phosphorescence
  • Quantum Properties
  • Quenching
  • Spin-Orbit Interaction

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Molecular Photonics/Laser Physics
  • Organic Chemistry

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene
  • Space