Photophysical properties of PPP and PPV derivatives bearing polystyrene or polycaprolactone as side groups

D.G. Colak, D.A.M. Egbe, E. Birckner, S. Yurteri, I. Cianga, E. Tekin, U.S. Schubert, Y. Yagci

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

8 Citaten (Scopus)

Samenvatting

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.
Originele taal-2Engels
Pagina's (van-tot)940-945
TijdschriftEuropean Polymer Journal
Volume45
Nummer van het tijdschrift3
DOI's
StatusGepubliceerd - 2009

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