Optical Properties of Boron-Incorporated Analogues of Tetrathienoanthracene
Optical Properties of Boron-Incorporated Analogues of Tetrathienoanthracene
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DOI：
10.1021/acs.organomet.2c00106
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发表时间：
2022-05
期刊：
影响因子：
2.8
通讯作者：
Yohei Adachi;Fuka Arai;Kohei Yamada;Maho Kurihara;J. Ohshita
中科院分区：
文献类型：
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作者：
Yohei Adachi;Fuka Arai;Kohei Yamada;Maho Kurihara;J. Ohshita
硼引入的芳香体系因其独特的光物理性质和可调的路易斯酸度而引起了材料化学家的兴趣。在这项工作中，我们制备了含有芳香钻环的四噻吩蒽（TTA）的掺硼类似物。尽管钻孔销环的芳香性较低，但双钻孔销表现出较高的化学稳定性并且在空气中不分解。有趣的是，双硼烷在室温下表现出蓝色荧光，在低温下表现出明亮的绿色磷光。通过比较双-borepin 与 TTA 和母体单-borepin 的光物理性质，揭示了 TTA 掺硼类似物的具体电子结构。通过DFT/TD-DFT计算进一步研究了电子结构。使用氰化物作为阴离子的滴定实验揭示了高路易斯酸度以及双硼烷对氰化物添加的关闭荧光响应。
Boron-introduced aromatic systems have caught the interest of materials chemists because of their unique photophysical properties and tunable Lewis acidity. In this work, we have prepared boron-incorporated analogues of tetrathienoanthracene (TTA) containing aromatic borepin rings. Despite the low aromaticity of the borepin rings, the bis-borepins showed high chemical stability and no decomposition in air. Interestingly, the bis-borepins exhibited bluish fluorescence at room temperature and bright greenish phosphorescence at a low temperature. The specific electronic structure of the boron-incorporated analogues of TTA was revealed by comparing the photophysical properties of the bis-borepins with those of TTA and the parent mono-borepin. The electronic structure was further investigated by DFT/TD-DFT calculations. Titration experiments using cyanide as the anion revealed the high Lewis acidity and the turn-off fluorescence response of the bis-borepins to the addition of cyanide.