| 초록 |
We have introduced 2-ethylhexyl selenophene as a substituent on benzodithiophene (BDT) unit, where the selenophene is attached on both sides of the phenyl ring. An array of three donor-acceptor (D-A) polymers containing BDT with 2-ethylhexyl selenophene as a conjugated side chain unit flanking perpendicularly to the planar BDT backbone unit are described. We also synthesized a new bisbenzothiadazole derivative namely, 3,3'-Diheptyl-3,4-propylenedioxythienyl-BBT [7,7'-(3,3-diheptyl-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepine-6,8-diyl)bis(4-bromobenzo[c][1,2,5]thiadiazole], in which 3,3'–diheptyl-3,4-propylenedioxythienyl group is inserted between two benzothiadiazole groups. 3,3'–diheptyl-3,4-propylenedioxythienyl-BBT, 1-(4,6-dibromothieno[3,4-b]thiophen-2-yl)-2-ethylhexan-1-one (TT), and N-ethylhexylthieno[3,4]pyrole-4,6-dione (TPD), were used as acceptor segments for the synthesis of D-A polymers represented by P1, P2, and P3, respectively. |
