Direct and Photoinduced Absorption in Poly(p-pyridyl Vinylene): Morphological Control of Triplet Excitons and Polarons.
OHIO STATE UNIV COLUMBUS DEPT OF PHYSICS
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Optical and photoinduced absorption PA studies of the polymer polyp-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.
- Polymer Chemistry
- Atomic and Molecular Physics and Spectroscopy