Journal
CHEMISTRY-AN ASIAN JOURNAL
Volume 14, Issue 3, Pages 462-470Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.201801483
Keywords
charge mobility; cyclodehydrogenation; luminescence; mesophase; thiophene
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Funding
- National Natural Science Foundation of China [21772135, 51773140]
- NSFC-JSPS joint project [50811140156]
- CNRS
- Universite de Strasbourg
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Fused-thiophene discotic liquid crystals were designed and easily synthesized by Suzuki coupling and FeCl3 oxidized tandem cyclodehydrogenation reactions, including homo- and cross-coupling reactions. The resulting hexagonal and rectangular columnar mesomorphic supramolecular structures formed were characterized by polarizing optical microscopy, differential scanning calorimetry, and small-angle X-ray scattering. The charge carrier transport properties in the mesophases of two of the synthesized fused-thiophene discogens were measured by transient photocurrent time-of-flight (TOF) technique, revealing fast hole transport values in the range of 10(-3) to 10(-2) cm(2) V-1 s(-1), thus demonstrating potential applications in electronic devices. The luminescent sanidic mesogens, with different extended pi-conjugated systems, also emit blue, green, or red light, with absolute photoluminescent quantum yields as high as 18 %.
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