Hexaphenylbenzene end-capped tri(p-phenylenevinylenes): synthesis and properties

Three new hexaphenylbenzene end-capped tri(p-phenylenevinylenes) were synthesized by the Horner–Wadsworth–Emmons reaction in good yields (86–76%). All compounds have bright fluorescent emissions in the blue to blue–green region in solution (λmax = 445–492 nm in tetrahydrofuran) and also high emission efficiency (Φfl = 0.51–0.72 in tetrahydrofuran). They exhibit good electrochemical reversibility, high thermal stability, and have high HOMO value.