Journal article

Understanding the Nature of the States Responsible for the Green Emission in Oxidized Poly(9,9-dialkylfluorene)s: Photophysics and Structural Studies of Linear Dialkylfluorene/Fluorenone Model Compounds

Khai Leok Chan, Marc Sims, Sofia I Pascu, Marilu Ariu, Andrew B Holmes, Donal DC Bradley

ADVANCED FUNCTIONAL MATERIALS | WILEY-V C H VERLAG GMBH | Published : 2009

Abstract

Here, the optical properties of a series of structurally well-defined model compounds for oxidatively degraded poly(dialkylfluorenes) (PFs) are reported. Specifically, linear compounds comprising one, two, or four dihexylfluorene (F) moieties together with one fluorenone (O) moiety placed either at the end or in the center of each chain (i.e., FO, FFO, FOF, FFOFF) are studied. The results support the recent observation that the photophysics of the fluorenone-centered ''pentamer'' (FFOFF) is most similar to that of oxidized PFs. They further demonstrate that molecule-molecule interaction is essential to activate the green emission band. Investigations by X-ray diffraction (XRD) identify the s..

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University of Melbourne Researchers