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Single-Molecule-based White-Light Emissive Organic Solids with Molecular-Packing-Dependent Thermally Activated Delayed Fluorescence
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2017-09-21 00:00:00 , DOI: 10.1021/acs.jpclett.7b02213 Yuewei Zhang 1 , Yang Miao 1 , Xiaoxian Song 1 , Yu Gao 1 , Zuolun Zhang 1 , Kaiqi Ye 1 , Yue Wang 1
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2017-09-21 00:00:00 , DOI: 10.1021/acs.jpclett.7b02213 Yuewei Zhang 1 , Yang Miao 1 , Xiaoxian Song 1 , Yu Gao 1 , Zuolun Zhang 1 , Kaiqi Ye 1 , Yue Wang 1
Affiliation
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White-light-emitting single molecules have attracted broad attention because of their great potential for use in flat-panel displays and future light sources. We report a unique molecule of 3-(diphenylamino)-9H-xanthen-9-one (3-DPH-XO), which was found to exhibit bright white-light emission in the solid state caused by the spontaneous formation of a mixture with different polymorphs. Single-crystal analyses demonstrate that noncovalent interactions (such as π···π stacking, hydrogen bonding, and C–H···π interactions) induce different stacking arrangements (polymorphs A, B, and C) with different photophysical properties in a molecular solid. In addition, crystals B and C with the acceptor···acceptor stacking feature show the thermally activated delayed fluorescence (TADF) characteristics, indicating that appropriate noncovalent interactions could enhance the reverse intersystem crossing process and consequently lead to delayed fluorescence. This discovery provides an effective strategy for the design of new white-light-emitting single molecules as well as TADF materials.
中文翻译：
基于单分子的白光发射有机固体，具有依赖于分子包装的热活化延迟荧光
发白光的单个分子因其在平板显示器和未来光源中的巨大应用潜力而备受关注。我们报告了一个独特的3-（二苯基氨基）-9 H-黄体酮9-一（3-DPH-XO）分子，发现该分子在固态下由于混合物的自发形成而显示出明亮的白光发射具有不同的多态。单晶分析表明，非共价相互作用（例如π··π堆积，氢键和C–H···π相互作用）会诱导不同的堆积排列（多晶型A，B和C），并具有不同的光物理性质。分子固体。此外，晶体B和C受体············································································································································································································································································ 这一发现为设计新的发射白光的单分子以及TADF材料提供了有效的策略。
更新日期：2017-09-21
中文翻译：
基于单分子的白光发射有机固体，具有依赖于分子包装的热活化延迟荧光
发白光的单个分子因其在平板显示器和未来光源中的巨大应用潜力而备受关注。我们报告了一个独特的3-（二苯基氨基）-9 H-黄体酮9-一（3-DPH-XO）分子，发现该分子在固态下由于混合物的自发形成而显示出明亮的白光发射具有不同的多态。单晶分析表明，非共价相互作用（例如π··π堆积，氢键和C–H···π相互作用）会诱导不同的堆积排列（多晶型A，B和C），并具有不同的光物理性质。分子固体。此外，晶体B和C受体············································································································································································································································································ 这一发现为设计新的发射白光的单分子以及TADF材料提供了有效的策略。
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