提高正硼烷基发光体辐射效率的几何关键:吲哚咔唑和间三联苯正硼烷

IF 1.7 4区 化学 Bulletin of the Korean Chemical Society Pub Date : 2023-12-09 DOI:10.1002/bkcs.12804
Mingi Kim, Kanghee Cho, Yung Ju Seo, Junhyeok Choi, Namkyun Kim, Ilsup Shin, Kang Mun Lee
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摘要

在本研究中,我们引入了两种正硼烷化合物,即 ICzCB 和 mTPCB,这两种化合物在其附加的 π 共轭芳香基团中表现出不同的平面度,以研究几何效应对辐射效率调节的影响。对这两种化合物进行了全面表征,发现它们的单晶结构存在明显的几何差异(平面性)。ICzCB 在固体(薄膜)状态下呈现出强烈的基于 ICT 的发射,而 mTPCB 则在高能区和低能区呈现出双重发射,分别源于局部激发(LE)和基于 ICT 的过程。对化合物光物理特性的定量分析表明,ICzCB 中基于 ICT 的辐射效率高于 mTPCB。因此,这些研究结果表明,以平面 ICzCB 和变形 mTPCB 为代表的邻碳硼烷上的π-共轭芳基的平面性是控制基于 ICT 的辐射衰变效率的重要关键。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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A geometric key for enhancing the radiative efficiency of ortho-carboranyl luminophores: Indolocarbazole- and m-terphenyl-ortho-carboranes

In this study, we introduce two ortho-carboranyl compounds, namely ICzCB and mTPCB, which exhibit different planarity in their appended π-conjugated aromatic groups, to investigate the influence of geometric effects on the regulation of the radiative efficiency. Both the compounds are fully characterized, revealing distinct geometric differences (planarity) in their single-crystal structures. While ICzCB presents strong ICT-based emission in the solid (film) state, mTPCB displays dual emission in the high- and low-energy regions that originates from locally excited (LE)- and ICT-based processes, respectively. Quantitative analysis of the photophysical characteristics of the compounds shows that the ICT-based radiative efficiency in ICzCB is higher than that in mTPCB. Consequently, these findings demonstrate that the planarity of the π-conjugated aryl group appended on o-carborane, which is represented by planar ICzCB and distorted mTPCB, is an important key to control the ICT-based radiative decay efficiency.

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来源期刊
Bulletin of the Korean Chemical Society
Bulletin of the Korean Chemical Society Chemistry-General Chemistry
自引率
23.50%
发文量
182
期刊介绍: The Bulletin of the Korean Chemical Society is an official research journal of the Korean Chemical Society. It was founded in 1980 and reaches out to the chemical community worldwide. It is strictly peer-reviewed and welcomes Accounts, Communications, Articles, and Notes written in English. The scope of the journal covers all major areas of chemistry: analytical chemistry, electrochemistry, industrial chemistry, inorganic chemistry, life-science chemistry, macromolecular chemistry, organic synthesis, non-synthetic organic chemistry, physical chemistry, and materials chemistry.
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