Hexathienocoronenes: Synthesis and Self-Organization

Here we report hexathienocoronenes (HTCs), fully thiophene-annelated
coronenes in which six double bonds in the periphery are thieno-fused.
The derivatives tetrasubstituted with hexyl and dodecyl chains show
a phase formation that strongly depends on the chain length. HTCs
are remarkably stronger donors than the known thiophene-annelated
coronenes but do not readily assemble into well-ordered films when
deposited from the vapor phase. Thus, thin-film transistors fabricated
by vacuum deposition have only modest field-effect mobilities of 0.002
cm2 V–1 s–1.