首页|A small D-A molecule with highly heat-resisting room temperature phosphorescence for white emission and anti-counterfeiting

A small D-A molecule with highly heat-resisting room temperature phosphorescence for white emission and anti-counterfeiting

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Achieving high heat-resisting room temperature phosphorescence(RTP)performance and robust white emission from pure small molecules is a meaningful but challenging work.Herein,a simple donor-acceptor(D-A)molecule,9-(1H-benzotriazol-1-ylmethyl)-9H-carbazole(CzBtrz),was investigated.This simple molecule not only exhibits multiple emissions including white light,thermally activated delayed fluorescence(TADF)and ultralong RTP with a lifetime of 988.54 ms at 545 nm,but also shows superhigh heat-resisting phosphorescence property which can maintain stability in a large temperature region from 77 to 350 K(ΔT=273 K),exceeding those of other RTP systems.Meanwhile,this molecule shows the time-evolved dynamic RTP.The experimental and theoretical an-alyses from CzBtrz crystal demonstrate that the intramolecular charge transfer(ICT)interaction and molecular stacking play an important role in the generation of RTP.Therefore,this work provides an efficient strategy to design ultrahigh heat-resistant RTP,ultralong RTP and single-phased white-light emitting materials.

Ultralong RTPTADFD-A moleculeHeat-resistingWhite light

Kun Zhang、Ni Dan、Dan-Dan Ren、Ruo-Yu Zhang、Xiaoyan Lu、Ya-Pan Wu、Li-Lei Zhang、Hong-Ru Fu、Dong-Sheng Li

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College of Materials and Chemical Engineering,China Three Gorges University,Yichang,443002,PR China

College of Chemistry and Chemical Engineering,Luoyang Normal University,Luoyang,471934,PR China

国家自然科学基金国家自然科学基金国家自然科学基金Natural Science Foundation for Excellent Young Scholars of Henan ProvinceNatural Science Foundation for Excellent Young Scholars of Henan ProvinceProgram for Innovative Research Team from the University of Henan ProvinceScience and Technology Research and Development program of the Joint Funds of Henan ProvinceOpen Foundation of State Key Laboratory of Structural Chemistry

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2024

10.1016/j.cjsc.2024.100244

结构化学
中国化学会 中国科学院福建物质结构研究所

结构化学

影响因子：0.44
ISSN：0254-5861
年,卷(期)：2024.43(3)
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