Accession Number:

ADA359383

Title:

J-Aggregation and Excimer Emission of Anisotropic Solutions and Solid Films of a Liquid Crystalline Conjugated Polymer

Descriptive Note:

Technical rept.

Corporate Author:

ROCHESTER UNIV NY DEPT OF CHEMICAL ENGINEERING

Report Date:

1999-01-11

Pagination or Media Count:

19.0

Abstract:

Novel features in the absorption and emission processes in liquid crystalline solutions and solvent-cast, self-ordered solid films of a luminescent conjugated polymer are reported. Dominant excimer emission with a minor blue edge aggregate emission were observed in isotropic solid films spin coated from isotropic solutions of polyquinoline 2. New, strongly red shifted, absorption and excitation bands observed in concentrated solutions exhibiting Smectic C like mesophase evidenced J-aggregation but the emission was characteristic of excimers. J-aggregated chromophores with excimer luminescence and emission dichroism were also observed in solvent-cast ordered solid films. These results demonstrate that excimer emission can arise from J-aggregates or ground state complexes of conjugated polymers. The results also exemplify how the interplay of self-organization and solution processing method can significantly influence the photophysics of conjugated polymers.

Subject Categories:

  • Physical Chemistry
  • Polymer Chemistry
  • Crystallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE