Incorporation of Lewis acidic boron centers into polystyrene side-chains has been realized by tin-boron and/or copper-boron exchange reactions. Arylborane compounds are of particular interest as the interaction of the empty p-orbital on the boron center with organic p-systems leads to interesting photophysical properties. The Lewis acidity of the boron center as well as the optical properties of the polymers can be easily fine tuned by variation of the aryl groups. The oxidative stability of these compounds has also been enhanced by the use of bulky 1,3,5-triisopropylphenyl groups. The polymers synthesized may find applications as conduction layers in OLED's or as sensors for nucleophiles.