Chain Conformations and Photoluminescence in Poly(di-n-octylfluorene)

Details Chain Conformations and Photoluminescence in Poly(di-n-octylfluorene) Chain Conformations and Photoluminescence in Poly(di-n-octylfluorene)

2004-09-09

arxiv.org/abs/cond-mat/0409210v4

Physics

Condensed Matter

Materials Science

4 pages, 3 figures, minor revisions

Scientific paper

The diverse steady-state spectroscopic properties of poly(di-n-octylfluorene) are addressed from a molecular-level perspective. Modeling of representative oligomers support the experimental observation of at least three distinguishable classes of conformational isomers with differing chain torsion angles. One class appears to be populated by a single compact structural isomer and this conforms to the so called beta phase. A rigorous Franck-Condon analysis of the photoluminescence in conjunction with Frenkel-type exciton band structure calculations are performed. These results accurately reproduce all major spectral features of the photoabsorption and those of singlet exciton emission.

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