Synthesis, structural characterization and electronic properties of 3,3′′′′′-bis(butylsulfanyl)-2,2′ : 5′,2" : 5",2′′′ : 5′′′,2′′′′ : 5′′′′,2′′′′′-sexithiophene

Synthesis and NMR, UV-VIS, electrochemical, mobility and X-ray characterization of 3,3'''''-bis(butylsulfanyl)-2,2': 5',2 ":5 ",2'": 5"',2'''': 5'''',2'''''-sexithiophene are reported. This compound combines the promising properties already observed for 3,3''',3'''''-tris(butylsulfanyl)-2,2' : 5',2 " : 5:,2''' : 5''''',2'''' : 5'''',2'''''-sexithiophene with a physical state more suitable for its use in field-effect transistors. In particular, the stability of the oxidized forms, the close packing in the solid state together with the mobility and on/off ratio observed make this sexithiophene of potential interest for organic semiconductors.