Board-like Fused-Thiophene Liquid Crystals and their Benzene Analogs: Facile Synthesis, Self-Assembly, p-Type Semiconductivity, and Photoluminescence
Board-like Fused-Thiophene Liquid Crystals and their Benzene Analogs: Facile Synthesis, Self-Assembly, p-Type Semiconductivity, and Photoluminescence
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板状熔融噻吩液晶及其苯类似物：简易合成、自组装、p 型半导体和光致发光
DOI：
10.1002/asia.201801483
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发表时间：
2019
影响因子：
4.1
通讯作者：
Donnio Bertr
中科院分区：
文献类型：
--
作者：
Zhao Kai-Chun;Du Jun-Qi;Wang Hai-Feng;Zhao Ke-Qing;Hu Ping;Wang Bi-Qin;Monobe Hirosato;Heinrich Benoit;Donnio Bertr
通过Suzuki偶联和FeCl 3氧化环化脱氢串联反应（包括均偶联和交叉偶联反应）设计并容易地合成了稠合噻吩双嵌段液晶。通过偏光显微镜、差示扫描量热法和小角X射线散射对所形成的六方和矩形柱状介晶超分子结构进行了表征。通过瞬态光电流飞行时间（TOF）技术测量了两种合成的稠合噻吩盘状化合物在中间相中的电荷载流子输运性质，揭示了快空穴输运值在10− 3至10− 2cm 2 V − 1 s −1范围内，从而展示了在电子器件中的潜在应用。具有不同扩展的π-共轭体系的发光sanitin介晶也发射蓝光、绿色或红光，绝对光致发光量子产率高达18%。
Fused‐thiophene discotic liquid crystals were designed and easily synthesized by Suzuki coupling and FeCl3oxidized 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 10−3to 10−2cm2V−1s−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 %.