Tuning Solid‐State Emission Behavior of Janus‐Type Anthracenes by Addition of Shielding Bridges

Tuning Solid‐State Emission Behavior of Janus‐Type Anthracenes by Addition of Shielding Bridges
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通过添加屏蔽桥来调整 Janus 型蒽的固态发射行为

DOI:
10.1002/cptc.202200074
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发表时间:
2022
期刊:
影响因子:
3.7
通讯作者:
Koizumi Toshio
Koizumi Toshio
中科院分区:
化学3区
文献类型:
--
作者:
Tokoro Yuichiro;Nakayama Genta;Yamamoto Shin‐ichi;Koizumi Toshio

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传统的π面屏蔽技术是制备有机发光晶体的一种有效方法。在这项研究中,我们将硅基夹状以太桥引入到Janus型的并苯中,其中一个是屏蔽的,一个是自由的π-Face-Face来系统地调节发射行为。单晶X射线结构分析和发射光谱表明,堆积结构、发射颜色和对刺激的响应性取决于桥的大小。具有短桥结构的菲分子导致了蒽环之间的Clip-菲和π-π相互作用,从而导致了固体中的绿色发射。相反,具有长桥的菲导致Clip-Clip相互作用而不是π-π相互作用,导致固体中的蓝色发射。Hirshfeld表面分析表明,中等桥联的蒽类化合物在晶体结构中产生了较弱的Clip-Clip相互作用,表现出从蓝色到绿色的机械荧光变色。
Traditional π‐face shielding is a useful technique to prepare emissive organic crystals. In this study, clip‐shaped ether bridges with silicon spacers were introduced into Janus‐type anthracenes with one shielded and one free π‐face to tune emission behavior systematically. Single‐crystal X‐ray structure analysis and emission spectra revealed that packing structures, emission color, and responsivity to stimuli depended on the size of the bridges. Anthracene molecules with short bridges resulted in clip‐anthracene and π‐π interactions between anthracene rings, leading to green emission in the solid state. In contrast, anthracenes with long bridges resulted in clip‐clip interactions without π‐π interactions, resulting in blue emission in the solid state. Hirshfeld surface analysis revealed that anthracenes with moderate bridges resulted in weak clip‐clip interactions in the crystal structure, which displayed mechanofluorochromism from blue to green emission.
DOI: 10.1246/cl.200339
发表时间: 2020-05
期刊: Chemistry Letters
影响因子: 1.6
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