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 characteriza tion of 3,3'''''-bis(butylsulfanyl)-2,2': 5',2 ":5 ",2'": 5"',2'''': 5'''', 2'''''-sexithiophene are reported. This compound combines the promising pro perties already observed for 3,3''',3'''''-tris(butylsulfanyl)-2,2' : 5',2 " : 5:,2''' : 5''''',2'''' : 5'''',2'''''-sexithiophene with a physical sta te more suitable for its use in field-effect transistors. In particular, th e stability of the oxidized forms, the close packing in the solid state tog ether with the mobility and on/off ratio observed make this sexithiophene o f potential interest for organic semiconductors.