Synthesis and Performance of New Type Thiophene Copolymers of Side Chain Including Imine

A new thiophene monomer of side chain including imine 2,5-dibromo-3-(fluorene-2-amine) methyl thiophenes was synthesized by Schiff-base reaction using Pd(PPh3)2Cl2 and CuI as catalyst. Four new conjugate copolymers Th-PE-6,Th-PE-8,Th-PE-10,Th-PE-12 were prepared by Sonogashira coupling reaction, which were characterized by FT-IR, 1H-NMR, UV-Vis, cyclic voltammogram (CV) and gel permeation chromatography (GPC). Results showed that the copolymer Th-PE-8, Th-PE-10, Th-PE-12 which emitted yellow-green light in THF solution had maximum PL emission at 467、 473、 470 nm, respectively. Th-PE-6, Th-PE-8 showed good electrochemical performance with three redox peaks from -0.2 to 0.8 V.