TY - JOUR
T1 - 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
AU - Chan, Khai Leok
AU - Sims, Marc
AU - Pascu, Sofia I
AU - Ariu, Marilù
AU - Holmes, Andrew B
AU - Bradley, Donal D C
PY - 2009/7/10
Y1 - 2009/7/10
N2 - 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 solid-state structure of a representative member of this class of compounds and reveal inter-molecular interaction through dipole-dipole coupling between neighboring fluorenone moieties.
AB - 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 solid-state structure of a representative member of this class of compounds and reveal inter-molecular interaction through dipole-dipole coupling between neighboring fluorenone moieties.
UR - http://www.scopus.com/inward/record.url?scp=67650458056&partnerID=8YFLogxK
UR - http://dx.doi.org/10.1002/adfm.200801792
U2 - 10.1002/adfm.200801792
DO - 10.1002/adfm.200801792
M3 - Article
VL - 19
SP - 2147
EP - 2154
JO - Advanced Functional Materials
JF - Advanced Functional Materials
SN - 1616-301X
IS - 13
ER -