title: Synthesis and characterizations of regioregular poly(3-alkylthiophene) with alternating dodecyl/1H,1H,2H,2H-perfluorooctyl side chains.
abstract: A regioregular poly[4'-dodecyl-3-(1H,1H,2H,2H-perfluorooctyl)-2,2'-bithiophene] (P3DDFT) with alternating alkyl and semifluoroalkyl side chains were synthesized. Short ethylene spacer between perfluorohexyl part and thiophene did not largely affect the absorption and emission properties of the polythiophene backbone in comparison with poly(3-dodecylthiophene) (P3DDT). P3DDFT showed a larger onset of the oxidation potential (+0.17 V) observed by cyclic voltamogram due to the electron withdrawing effect of the fluoroalkyl part. Thermal analysis and X-ray diffraction patterns indicated that P3DDFT in the solid state forms a semicrystalline lamellar structure that is similar to that of P3DDT. Ultraviolet photoemission spectroscopy was also used to investigate their electron structure in the films. Comparison of hole mobilities in the films suggested that P3DDFT could have a less ordered packing structure compared to P3DDT both in the bulk and at the dielectric interface.
authors: Department of Applied Chemistry, School of Engineering, The University of Tokyo, Bunkyo-ku, Japan.
authors: Yanfang
authors: Y
authors: Geng
authors: Keisuke
authors: K
authors: Tajima
authors: Kazuhito
authors: K
authors: Hashimoto
mesh_terms: D015394:Molecular Structure; D011108:Polymers / Q000138:chemical synthesis* / Q000737:chemistry; D013876:Thiophenes / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D011108:Polymers; D013876:Thiophenes; C066730:polythiophene