Conjugated Polymers Featuring Heavier Main Group Element Multiple Bonds: A Diphosphene-PPV

摘要

Organic -conjugated polymers are of much current academic and significant technological interest due to their optical and electronic properties. Of these materials, poly(phenylenevinylene)s (PPVs) have attracted the most attention and found greatest utility in devices.1 This particular architectural framework thus serves as an attractive platform upon which one may consider systematic isolobal replacements of the constituent carbene (CR_2) fragments for other main group fragments having available a p orbital capable of participating in p-p π conjugation with carbon-carbon double bonded systems. Phosphinidenes (PR) are fragments capable of replacing carbene units within molecules and providing a wide array of molecules containing P=C and P=P functional groups. While phosphorus has long been an important component of polymers, materials engaging the phosphorus atom in extended linear p-p conjugation have only recently been realized. Hybrid inorganic-organic conjugated systems promise novel electronic properties and the processability and tunability typical of many organic polymers.