Repurposing DNA-binding agents as H-bonded organic semiconductors
Repurposing DNA-binding agents as H-bonded organic semiconductors
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DOI：
10.1038/s41467-019-12248-9
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发表时间：
2019-09
影响因子：
16.6
通讯作者：
Fengjiao Zhang;V. Lemaur;Wookjin Choi;Prapti Kafle;S. Seki;J. Cornil;D. Beljonne;Ying Diao
中科院分区：
文献类型：
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作者：
Fengjiao Zhang;V. Lemaur;Wookjin Choi;Prapti Kafle;S. Seki;J. Cornil;D. Beljonne;Ying Diao
有机半导体通常是多环芳烃及其含有杂原子取代的类似物。有机电子学中的仿生材料化学有望实现新的电荷传输机制和对生物分子的特异性分子识别。我们从脱氧核糖核酸拓扑异构酶抑制剂中发现了有机半导体，其特征是共轭骨架上装饰着与普通有机半导体不同的氢键部分。以椭圆碱为模型化合物，我们发现氢键不仅引导多晶型组装，而且在低二面角时，通过缩短相邻π−平面的端到端距离，对于沿π共轭平面形成有效的电荷传输路径也是至关重要的。在π−π堆积和氢键方向，用微波电导率测得的本征短程空穴迁移率分别高达6.5cm2V−1s−1和4.2 cm2V−1s−1，而在场效应管中测得的长程表观空穴迁移率分别达到1.3cm2V× 10-3cm2V−1s−1和0.4 × 10-3cm2V−1s−1。我们进一步展示了印刷晶体管器件和化学传感器的潜在应用。
Organic semiconductors are usually polycyclic aromatic hydrocarbons and their analogs containing heteroatom substitution. Bioinspired materials chemistry of organic electronics promises new charge transport mechanism and specific molecular recognition with biomolecules. We discover organic semiconductors from deoxyribonucleic acid topoisomerase inhibitors, featuring conjugated backbone decorated with hydrogen-bonding moieties distinct from common organic semiconductors. Using ellipticine as a model compound, we find that hydrogen bonds not only guide polymorph assembly, but are also critical to forming efficient charge transport pathways along π−conjugated planes when at a low dihedral angle by shortening the end-to-end distance of adjacent π planes. In the π−π stacking and hydrogen-bonding directions, the intrinsic, short-range hole mobilities reach as high as 6.5 cm2V−1s−1and 4.2 cm2V−1s−1measured by microwave conductivity, and the long-range apparent hole mobilities are up to 1.3 × 10–3cm2V−1s−1and 0.4 × 10–3cm2V−1s−1measured in field-effect transistors. We further demonstrate printed transistor devices and chemical sensors as potential applications.