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Board‐like Fused‐Thiophene Liquid Crystals and their Benzene Analogs: Facile Synthesis, Self‐Assembly, p‐Type Semiconductivity, and Photoluminescence
Chemistry - An Asian Journal ( IF 4.1 ) Pub Date : 2019-01-14 , DOI: 10.1002/asia.201801483
Kai‐Chun Zhao 1 , Jun‐Qi Du 1 , Hai‐Feng Wang 1 , Ke‐Qing Zhao 1 , Ping Hu 1 , Bi‐Qin Wang 1 , Hirosato Monobe 2 , Benoît Heinrich 3 , Bertrand Donnio 3
Affiliation  

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 cm2 V−1 s−1, thus demonstrating potential applications in electronic devices. The luminescent sanidic mesogens, with different extended π‐conjugated systems, also emit blue, green, or red light, with absolute photoluminescent quantum yields as high as 18 %.

中文翻译:

板状熔融噻吩液晶及其苯类似物:简便的合成,自组装,p型半导电性和光致发光

通过Suzuki偶联和FeCl 3氧化串联环脱氢反应,包括均相和交叉偶联反应,设计并轻松合成了噻吩盘状液晶。通过偏振光学显微镜,差示扫描量热法和小角度X射线散射对形成的六边形和矩形柱状介晶超分子结构进行表征。通过瞬态光电流飞行时间(TOF)技术测量了两种合成的噻吩致密物的两个中间相中的载流子输运性质,揭示了在10 -3到10 -2  cm 2范围内的快速空穴输运值 V -1 秒-1,因此证明了在电子设备中的潜在应用。具有不同扩展π共轭体系的发光桑地素液晶元也发出蓝,绿或红光,其绝对光致发光量子产率高达18%。
更新日期:2019-01-14
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