Abstract: A novel class of poly(aryleneethyny1ene) derivatives were synthesized via cross coupling between the large bandgap monomer, 1,4diethynyl2,5bis(ndodecyloxy)benzene (PE), and low bandgap monomer, 4,7bis(5bromo2furan)2,1,3benzothiadiazole (FBT), in the medium of tetrahydrofuran and diisopropylamine with Pd(PPh3)4 and CuI as catallysts. These polymers are soluble in common organic solvents and possess good filmformability due to the decoration of flexible alkyloxy chains. The UVVis absorption, photoluminescent and electrochemical properties of the resulted copolymers are studied. Absorption onsets and emission maxima of these polymers are significantly redshifted along with the increase of FBT's fraction in polymers' backbones. When the maximum emissions of copolymers' films peak are located at 600—650 nm, the energy could efficiently transfer from PE units to FBT moieties in these polymers.