Controlling the Dual‐Emission Character of Aryl‐Modified <i>o</i> ‐Carboranes by Intramolecular CH???O Interaction Sites
Controlling the Dual‐Emission Character of Aryl‐Modified <i>o</i> ‐Carboranes by Intramolecular CH???O Interaction Sites
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通过分子内CH ??? O 相互作用位点控制芳基修饰<i>o</i> -碳硼烷的双发射特性
DOI：
10.1002/chem.202200155
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Chujo Yoshiki
中科院分区：
文献类型：
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作者：
Ochi Junki;Yuhara Kazuhiro;Tanaka Kazuo;Chujo Yoshiki
在有机染料固体中，由于激发态电子性质的调节和浓度猝灭的困难，实现两个发光带同时出现的双发射体系仍然是一个具有挑战性的系统。O-Carborane是一个通用的构建固体发射体的平台，因为球状的硼原子簇有利于抑制分子间的相互作用和随后的浓度猝灭。在这里，我们展示了固态双发射碳硼烷衍生物。我们制备了4种邻碳硼烷衍生物，发现它们在溶液和固体中都有双发射行为。通过分子内CcageH-⋅⋅⋅-O相互作用调节TO-Carborane单元的转动，改变了双发射强度比。最后，证明了总的光致发光光谱可以用分子内相互作用结合能来估算。
It is still challenging to realize a dual‐emission system, in which two luminescent bands simultaneously appear by photoexcitation, in solid with organic dyes due to the difficulty in regulation of electronic properties in the excited state and concentration quenching.o‐Carborane is known to be a versatile platform for constructing solid‐state emitters since the sphere boron cluster is favorable for suppressing intermolecular interactions and subsequently concentration quenching. Here, we show solid‐state dual‐emissiveo‐carborane derivatives. We prepared 4 types ofo‐carborane derivatives and found dual‐emission behaviors both in solution and solid states. By regulating the rotation at theo‐carborane unit with the intramolecular CcageH⋅⋅⋅O interaction, the dual‐emission intensity ratios were changed. Finally, it was demonstrated that the overall photoluminescence spectra can be estimated using the binding energy of intramolecular interactions.