Synthesis and optical properties of highly fluorescent meta-para oligo-phenylenevinylenes

摘要

The synthesis of unsubstituted meta-para oligo-phenylenevinylene (mp-OPV) was carried out via metathesispolycondensation (acyclic diene metathesis polymerisationADMET) of commercially available divinylbenzene (55% inethylvinylbenzene). A stable molybdenum carbene complex of theSchrock type served as initiator. The obtained mp-OPV, which isan intensively yellow powder, with a degree of polymerisation of2-6 is soluble in CHCl_3. This oligomer shows aphotoluminescence quantum efficiency >50% and #lambda#_(em)lies in the blue-green range.