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Synthesis and optical properties of novel poly( p ‐phenylene ethynylene)s
Author(s) -
Dellsperger Simon,
Dötz Florian,
Smith Paul,
Weder Christoph
Publication year - 2000
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/(sici)1521-3935(20000201)201:2<192::aid-macp192>3.0.co;2-e
Subject(s) - photoluminescence , conjugated system , phenylene , copolymer , polymer chemistry , absorption (acoustics) , band gap , photochemistry , materials science , absorption spectroscopy , suzuki reaction , derivatization , chemistry , polymer , organic chemistry , optoelectronics , optics , palladium , catalysis , physics , high performance liquid chromatography , composite material
In order to explore the influence of chemical modifications on the photophysical properties of poly( p ‐phenylene ethynylene)s (PPEs), a series of PPE‐copolymers was synthesized employing Heck‐type cross‐coupling reactions. UV/Vis absorption and photoluminescence experiments clearly demonstrate that the design of PPE‐copolymers which comprise conjugated segments of well‐defined length and (aliphatic) spacers in a strictly alternating fashion allows to tune the bandgap to higher energies, and thus the absorption and emission maxima to shorter wavelengths. The derivatization of the PPE backbone with electron‐withdrawing substituents, by contrast, is found to be significantly less effective and only leads to comparably small shifts in the absorption and emission spectra.