Hexathienocoronenes: Synthesis
and Self-Organization
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Abstract
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
cm<sup>2</sup> V<sup>–1</sup> s<sup>–1</sup>