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Guanine–oligothiophene conjugates: liquid-crystalline properties, photoconductivities and ion-responsive emission of their nanoscale assemblies†
Chemical Science ( IF 7.6 ) Pub Date : 2017-10-24 00:00:00 , DOI: 10.1039/c7sc03764c Kian Ping Gan 1 , Masafumi Yoshio 1 , Yuki Sugihara 1 , Takashi Kato 1
Chemical Science ( IF 7.6 ) Pub Date : 2017-10-24 00:00:00 , DOI: 10.1039/c7sc03764c Kian Ping Gan 1 , Masafumi Yoshio 1 , Yuki Sugihara 1 , Takashi Kato 1
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We here report the supramolecular self-assembly of hydrogen-bonded motifs for the development of nanostructured materials that exhibit dynamic functions such as stimuli-responsive properties and molecular recognition behaviour. We have designed and synthesised new thermotropic bicontinuous and columnar liquid-crystalline (LC) guanine–oligothiophene conjugates tethered with lipophilic chains, which exhibit ionic, electronic and photoluminescence properties. Their potassium salt complexes self-assemble into thermotropic columnar LC phases. Time-of-flight photoconductivity measurements have revealed that the guanine–oligothiophene conjugates in the LC states possess charge transport abilities with either electron or ambipolar mobility values of 10−4 to 10−3 cm2 V−1 s−1. Furthermore, we have found that the complexation of potassium ions with the guanine motif could lead not only to structural change and thermal stabilization of the LC phases but also to a photoluminescence colour change in the solid states. The strategy presented in this work could lead to the design of new functional LC materials that could potentially be applicable as sensors and electronic devices.
中文翻译：
鸟嘌呤-低聚噻吩共轭物：纳米级组件的液晶特性、光电导和离子响应发射†
我们在这里报告了氢键基序的超分子自组装，用于开发具有动态功能（如刺激响应特性和分子识别行为）的纳米结构材料。我们设计并合成了新的热致双连续和柱状液晶 (LC) 鸟嘌呤-低聚噻吩共轭物，它们与亲脂链相连，具有离子、电子和光致发光特性。它们的钾盐络合物自组装成热致柱状 LC 相。飞行时间光电导测量表明，LC 态的鸟嘌呤-低聚噻吩共轭物具有电荷传输能力，电子或双极迁移率值为 10 -4至 10 -3 cm 2V -1秒-1。此外，我们发现钾离子与鸟嘌呤基序的络合不仅可以导致 LC 相的结构变化和热稳定性，还可以导致固态的光致发光颜色变化。这项工作中提出的策略可能会导致设计新的功能性 LC 材料，这些材料可能适用于传感器和电子设备。
更新日期：2017-10-24
中文翻译：
鸟嘌呤-低聚噻吩共轭物：纳米级组件的液晶特性、光电导和离子响应发射†
我们在这里报告了氢键基序的超分子自组装，用于开发具有动态功能（如刺激响应特性和分子识别行为）的纳米结构材料。我们设计并合成了新的热致双连续和柱状液晶 (LC) 鸟嘌呤-低聚噻吩共轭物，它们与亲脂链相连，具有离子、电子和光致发光特性。它们的钾盐络合物自组装成热致柱状 LC 相。飞行时间光电导测量表明，LC 态的鸟嘌呤-低聚噻吩共轭物具有电荷传输能力，电子或双极迁移率值为 10 -4至 10 -3 cm 2V -1秒-1。此外，我们发现钾离子与鸟嘌呤基序的络合不仅可以导致 LC 相的结构变化和热稳定性，还可以导致固态的光致发光颜色变化。这项工作中提出的策略可能会导致设计新的功能性 LC 材料，这些材料可能适用于传感器和电子设备。
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