Accession Number : ADA305224

Title :   Direct and Photoinduced Absorption in Poly(p-pyridyl Vinylene): Morphological Control of Triplet Excitons and Polarons.

Descriptive Note : Technical rept.,

Corporate Author : OHIO STATE UNIV COLUMBUS DEPT OF PHYSICS

Personal Author(s) : Jessen, S. W. ; Blatchford, J. W. ; Wang, Y. Z. ; Gebler, D. D. ; Lin, L. B.

PDF Url : ADA305224

Report Date : 01 MAR 1996

Pagination or Media Count : 16

Abstract : Optical and photoinduced absorption (PA) studies of the polymer poly(p-pyridyl vinylene) (PPyV) are reported. Differences in the PA of powders and films of PPyV demonstrate that the relative stability of the photoexcited species (singlet and triplet excions, polarons) varies with environment as a result of an enhanced intersystem crossing (ISC) route due to the presence of a nitrogen heteroatom in the backbone of the polymer chain. We conclude that triplet excitons and polarons are photocreated in powders and polarons are photocreated in films.

Descriptors :   *EXCITONS, *POLYVINYLIDENES, STABILITY, POLYMERS, POWDERS, MORPHOLOGY, ELECTRONIC STATES, OPTICAL PUMPING.

Subject Categories : Polymer Chemistry
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE