Fused-thiophene discotic liquid crystals were designed and easily synthesized by Suzukic oupling and FeCl 3 oxidized tandemc yclodehydrogenation reactions, including homo-andcross-coupling reactions. The resultingh exagonal and rectangular columnar mesomorphic supramolecular structures formed werec haracterized by polarizing optical microscopy,d ifferential scanning calorimetry,a nd smallangle X-ray scattering. The charge carrier transport proper-ties in the mesophases of two of the synthesized fused-thiophene discogensw ere measured by transient photocurrent time-of-flight (TOF) technique, revealing fast hole transport values in the range of 10 À3 to 10 À2 cm 2 V À1 s À1 ,t hus demonstratingp otentiala pplications in electronic devices.T he luminescent sanidic mesogens, with different extended p-conjugated systems, also emitb lue, green, or red light,w ith absolute photoluminescent quantum yields as high as 18 %.

Benzothienobenzothiophene (BTBT) liquid-crystalline semiconductors are arousing a lot of interest due to their long-range ordered, self-organizational abilities and high-charge carrier transport properties.

Searching for new organic, mesomorphic semiconductors is essential for the development of applications in the emerging field of molecular electronics.

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