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首页> 外文期刊>ChemPlusChem >Synthesis, Photophysical Characterization, and Self‐Assembly of Hexa‐ peri peri ‐hexabenzocoronene/Benzothiadiazole Donor–Acceptor Structure
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Synthesis, Photophysical Characterization, and Self‐Assembly of Hexa‐ peri peri ‐hexabenzocoronene/Benzothiadiazole Donor–Acceptor Structure

机译：Hexa-Peri Peri -hexabenzoCoronene / Benzothiadozole供体结构的合成，光学表征和自组装

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摘要

Abstract Hexa‐ peri ‐hexabenzocoronene (HBC) substituted by six benzothiadiazole (BTZ) units with ethynylene bridges is synthesized as a new donor–acceptor (D–A) motif. The C≡C bridges significantly reduce the dihedral angles between HBC and BTZ, and thus, lead to a planar molecular conformation as predicted by density functional theory calculations. The optoelectronic properties are investigated by UV/Vis absorption and emission spectroscopies with absorption and emission maxima at 424 and 650?nm, respectively, demonstrating the tunable electronic structures of HBC through the attachment of electron‐withdrawing BTZ units. Two‐dimensional wide‐angle X‐ray scattering analysis shows that the molecules self‐assemble into liquid‐crystalline columns with high stability over a wide temperature range. Scanning tunneling microscopy reveals the formation of ordered bilayers of the D–A molecules with star‐shaped structures.
机译：摘要六苯并苯并聚酮（HBC）被六苯并噻唑（BTZ）单位代替乙炔基桥，合成为新的供体 - 受体（D-A）基序。 C 1C桥梁显着降低了HBC和BTZ之间的二面角，因此导致平面分子构象，如密度泛函理论计算所预测的。 通过在424和650〜NM的吸收和发射光谱法中通过UV / Vis吸收和发射光谱研究了光电性能，通过附着电子提取的BTZ单元来证明HBC的可调谐电子结构。 二维广角X射线散射分析表明，分子在宽温度范围内自组装成具有高稳定性的液晶柱。 扫描隧穿显微镜显示D-A分子的有序双层的形成，具有星形结构。

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