Phenothiazine derivatives, diketopyrrolopyrrole-based conjugated polymers: synthesis, optical and organic field effect transistor properties

Novel donor–acceptor (D-A) conjugated polymers containing phenothiazine and diketopyrrolopyrrole derivatives were successfully synthesized via direct arylation polymerization using the palladium catalyst system. The C-N coupling reaction was performed for the synthesis of 4-(10H-phenothiazin-10-yl)-N,N-diphenylaniline (PDA) and 10-(pyren-1-yl)-10H-phenothiazine (PYP) as donor monomers. The D-A conjugated polymers synthesized by polymerization of PDA/PY with diketopyrrolopyrrole have been characterized via GPC, 1 H NMR, FTIR, XRD, DSC, PL and UV-Vis spectroscopy, and used for fabrication of organic field effect transistors. Graphical abstract The novel D-A conjugated polymers containing phenothiazine derivatives and diketopyrrolopyrrole were successfully synthesized via direct (hetero)arylation polymerization. The obtained conjugated polymers have been applied for the fabrication of organic filed effect transistors. The conjugated polymers showed a hole mobility of 10 −5 cm2/Vs in top contact OFET devices.