REGIOSELECTIVITY OF THE PD-CATALYZED SYNTHESIS OF ARYLENEVINYLENES AND ITS IMPACT ON POLYMER PROPERTIES - MODEL REACTION AND POLYREACTIONS

The regioselectivity of Pd-catalyzed coupling reactions of functionali zed benzenes and olefins with respect to the ratio of 1.2-product/1.1- product was monitored by model reactions. The coupling of halobenzenes , benzene triflate, and aryldiazonium salts was studied under various reaction conditions. In order to simulate corresponding polyreactions, special focus was on the coupling of ortho-substituted functionalized benzenes with ethylene or styrene in order to evaluate the input of m ono- and disubstituted aryl monomers and the choice of the olefin on t he regioselectivity of polyreactions. The results of the model reactio ns were transferred to the polyreactions. The polymers were characteri zed by NMR, absorption and photoluminescence spectroscopy as well as e lectroluminescence.