Poly(para-phenylene vinylene) and polynorbornadiene containing rod-coil block copoylmers via combination of acyclic diene metathesis and ring-opening metathesis polymerization

摘要

Poly(para-phenylene vinylene) (PPV) and its derivatives are important semiconducting polymers for organic electronics. Herein, an alkene metathesis approach to obtain PPVs is reported. Tri(iso propyl)silyl-substituted norbornadienes are employed as solubilizing agents. As PPV precursors divinylbenzene is used for acyclic diene metathesis and paracyclophane diene for a ring-opening metathesis polymerization-type approach. The resulting polymers are analyzed by gel permeation chromatography (GPC), UV-vis, fluorescence, and nuclear magnetic resonance (NMR) spectroscopy. All of the polymers show good solubility in common solvents. Copolymerization of tri(iso propyl)silyl- substituted norbornadiene with different poly(para-phenylene vinylene) (PPV) precursors in a combined acyclic diene metathesis and/or ring-opening metathesis polymerization process gives novel rod-coil block copolymers. The resulting polymers show increased solubility compared with pure PPV and are examined by gel permeation chromatography, NMR, UV-vis, and fluorescence spectroscopy.