TY - JOUR
T1 - Photophysical properties of PPP and PPV derivatives bearing polystyrene or polycaprolactone as side groups
AU - Colak, D.G.
AU - Egbe, D.A.M.
AU - Birckner, E.
AU - Yurteri, S.
AU - Cianga, I.
AU - Tekin, E.
AU - Schubert, U.S.
AU - Yagci, Y.
PY - 2009
Y1 - 2009
N2 - The photophys. properties were studied of poly(p-phenylene) (PPP) and poly(p-phenylene-vinylene) (PPV) derivs. laterally decorated with polystyrene (PPV-PSt) or poly(e-caprolactone) (PPP-PCL, PPP- alt PCL, PPV-PCL and PPV-PCL-Br). The polymers emit blue light and exhibit high relative and abs. photoluminescence quantum yield (Ff), in dil. soln., thin film (spin-coated and inkjet-printed), and bulk state. These parameters are ascribed to the side groups, which suppress the strong pi-pi interactions and, consequently, excimer formation. Lower Ff was obsd. for PPV-PCL-Br and its corresponding model compd. dibromo-distyrylbenzene 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 temp. measurements was obsd.
AB - The photophys. properties were studied of poly(p-phenylene) (PPP) and poly(p-phenylene-vinylene) (PPV) derivs. laterally decorated with polystyrene (PPV-PSt) or poly(e-caprolactone) (PPP-PCL, PPP- alt PCL, PPV-PCL and PPV-PCL-Br). The polymers emit blue light and exhibit high relative and abs. photoluminescence quantum yield (Ff), in dil. soln., thin film (spin-coated and inkjet-printed), and bulk state. These parameters are ascribed to the side groups, which suppress the strong pi-pi interactions and, consequently, excimer formation. Lower Ff was obsd. for PPV-PCL-Br and its corresponding model compd. dibromo-distyrylbenzene 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 temp. measurements was obsd.
U2 - 10.1016/j.eurpolymj.2008.11.040
DO - 10.1016/j.eurpolymj.2008.11.040
M3 - Article
SN - 0014-3057
VL - 45
SP - 940
EP - 945
JO - European Polymer Journal
JF - European Polymer Journal
IS - 3
ER -