Photophysics of N,N-Dimethyldihydrophenazine and Benzoannelated Analogues. Structurally Dependent Excited State Hierarchy,

Abstract

Absorption and fluorescence spectra, fluorescence lifetimes, and fluorescence quantum yields for 5,10-dimethyl-5,10-dihydrophenazine (DMP), 9,14-dimethyl-9,14-dihydrodibenzoA,C phenzaine (DMAC), 9,14-dimethyl-9,14-dihydrophenanthro4,5-ABCphenazine (DMPP) and 6,13-dimethyl-6,13-dihydrobibenzoB,Iphenazine (DBMI) have been measured in benzene solution at room temperature. The excited state behavior of DMP, DMAC, and DMPP is similar. The long natural radiative lifetimes and large separation between absorption and emission maxima suggest that the first transition is symmetry forbidden. DMBI is unique in the series with a comparatively short natural radiative lifetimes and a relatively small separation between absorption and emission maxima. These results, in conjunction with PPP calculations, reveal a different hierarchy of electronic states for DMBI, such that the first transition is strongly allowed. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Feb 26, 1980
Accession Number
ADA081658

Entities

People

  • Brian G. Dixon
  • Gary Schuster
  • Steven P. Schmidt

Organizations

  • University of Illinois Urbana–Champaign

Tags

Communities of Interest

  • C4I
  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Absorption
  • Absorption Spectra
  • Alkanes
  • California
  • Chemical Compounds
  • Chemistry
  • Electronic States
  • Elements
  • Emission Spectra
  • Governments
  • Materials
  • Materials Science
  • Military Research
  • Quantum Yields
  • Spectra
  • Transitions
  • United States

Fields of Study

  • Chemistry

Readers

  • Chemistry (specifically Chemical Fluorescence)
  • Materials Science and Engineering.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene
  • Quantum Computing