Abstract
A series of photophysical measurements and semiempirical calculations were carried out with 1,4-bis(phenylethynyl)benzene in search of evidence on the effects of phenyl group rotation and chromophore aggregation of oligo- and poly(phenyleneethynylene)s. It is suggested that planarization gives rise to relatively modest shifts of ca. 20-30 nm, which preserve the vibronic structure of the monomer and retain a high emission quantum yield. In contrast, it is proposed that aggregation gives rise to larger shifts and loss of vibronic structure.
Keywords
ChemistryChromophoreExcited stateMonomerBenzeneChemical-mechanical planarizationPhotochemistryQuantum yieldYield (engineering)CrystallographyFluorescencePolymerOrganic chemistryAtomic physicsOptics
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Publication Info
- Year
- 2001
- Type
- article
- Volume
- 123
- Issue
- 18
- Pages
- 4259-4265
- Citations
- 343
- Access
- Closed
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Cite This
Marcia Levitus,
Kelli Schmieder,
Holly Ricks
et al.
(2001).
Steps To Demarcate the Effects of Chromophore Aggregation and Planarization in Poly(phenyleneethynylene)s. 1. Rotationally Interrupted Conjugation in the Excited States of 1,4-Bis(phenylethynyl)benzene.
Journal of the American Chemical Society
, 123
(18)
, 4259-4265.
https://doi.org/10.1021/ja003959v
Identifiers
- DOI
- 10.1021/ja003959v