A solution-processable polymer-grafted graphene oxide derivative for nonvolatile rewritable memory

摘要

A new conjugated polymer, poly{[9,9-di(triphenylamine) fluorenel-[9,9-dihexylfluorene]-[4,4'-(9H-fluorene-9,9-diyl) dibenzenaminel)(PTHF), was synthesized by the Suzuki coupling reaction and used to react with the graphene oxide (GO) containing surface-bonded acyl chloride moieties to give a solution-processable GO-PTHF. Covalent attachment of PTHF onto GO resulted in the partial fluorescence quenching of the parent polymer, suggesting energy and/or electron transfer between the excited singlet states of the PTHF moiety and the GO moiety. The absolute photoluminescence (PL) quantum yields (Φ_(PL)) of the samples were changed from 0.59 for PTHF to 0.31 for GO-PTHF. A light-induced electron paramagnetic resonance (LEPR) technique was employed to study the photoinduced spins in the conjugated GO-PTHF.