TY - JOUR
T1 - Photophysical properties of PPP and PPV derivatives bearing polystyrene or polycaprolactone as side groups
AU - Colak, Demet Goen
AU - Egbe, Daniel Ayuk Mbi
AU - Birckner, Eckhard
AU - Yurteri, Seda
AU - Cianga, Ioan
AU - Tekin, Emine
AU - Schubert, Ulrich S.
AU - Yagci, Yusuf
PY - 2009/3
Y1 - 2009/3
N2 - This contribution reports on detailed photophysical investigations of poly(p-phenylene) PPP and poly(p-phenylene-vinylene) (PPV) derivatives laterally decorated with polystyrene (PPV-PSt) or poly(ε-caprolactone) (PPP-PCL, PPP-altPCL, PPV-PCL and PPV-PCL-Br). The polymers emit blue and exhibit very high relative and absolute photoluminescence quantum yield, Φf, in dilute solution, thin film (spin-coated and inkjet-printed) and bulk state. This is ascribed to the presence of the lateral macromolecules, which suppress the strong π-π interactions and consequently excimers formation. Lower Φf value was obtained for the bromine containing polymer and its corresponding model compound dibromodistyrylbenzene Br2-DSB, which was ascribed to heavy atom effect enabling intersystem crossing from S1 to T1. However, studies at 77 K did not reveal phosphorescence, in contrast an enhancement of the fluorescence intensity with respect to room temperature measurement was observed.
AB - This contribution reports on detailed photophysical investigations of poly(p-phenylene) PPP and poly(p-phenylene-vinylene) (PPV) derivatives laterally decorated with polystyrene (PPV-PSt) or poly(ε-caprolactone) (PPP-PCL, PPP-altPCL, PPV-PCL and PPV-PCL-Br). The polymers emit blue and exhibit very high relative and absolute photoluminescence quantum yield, Φf, in dilute solution, thin film (spin-coated and inkjet-printed) and bulk state. This is ascribed to the presence of the lateral macromolecules, which suppress the strong π-π interactions and consequently excimers formation. Lower Φf value was obtained for the bromine containing polymer and its corresponding model compound dibromodistyrylbenzene Br2-DSB, which was ascribed to heavy atom effect enabling intersystem crossing from S1 to T1. However, studies at 77 K did not reveal phosphorescence, in contrast an enhancement of the fluorescence intensity with respect to room temperature measurement was observed.
KW - Photophysical properties
KW - Poly(ε-caprolactone)
KW - Poly(p-phenylene)
KW - Poly(p-phenylene-vinylene)
KW - Polystyrene
UR - http://www.scopus.com/inward/record.url?scp=59649093094&partnerID=8YFLogxK
U2 - 10.1016/j.eurpolymj.2008.11.040
DO - 10.1016/j.eurpolymj.2008.11.040
M3 - Article
AN - SCOPUS:59649093094
SN - 0014-3057
VL - 45
SP - 940
EP - 945
JO - European Polymer Journal
JF - European Polymer Journal
IS - 3
ER -