高等学校化学学报 ›› 2024, Vol. 45 ›› Issue (7): 20240051.doi: 10.7503/cjcu20240051

• 有机化学 • 上一篇    下一篇

桥联氟代四苯基乙烯化合物的合成、发光和刺激响应性质

董一然1, 李凤姣1, 苗金玲2(), 聂永1(), 李天瑞1,2, 许春月1, 刘威1, 刘广宁2, 蒋绪川1()   

  1. 1.济南大学智能材料与工程研究院
    2.化学化工学院, 山东省氟化学化工材料重点实验室, 济南 250022
  • 收稿日期:2024-01-29 出版日期:2024-07-10 发布日期:2024-04-29
  • 通讯作者: 苗金玲,聂永,蒋绪川 E-mail:chm_miaojl@ujn.edu.cn;Chm_niey@ujn.edu.cn;ism_jiangxc@ujn.edu.cn
  • 基金资助:
    山东省自然科学基金(ZR2020MB001)

Synthesis, Photoluminescence and Stimulus-responsiveness Properties of Bridged Fluorinated Tetraphenylethene Compounds

DONG Yiran1, LI Fengjiao1, MIAO Jinling2(), NIE Yong1(), LI Tianrui1,2, XU Chunyue1, LIU Wei1, LIU Guangning2, JIANG Xuchuan1()   

  1. 1.Institute for Smart Materials & Engineering
    2.Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials,School of Chemistry and Chemical Engineering,University of Jinan,Jinan 250022,China
  • Received:2024-01-29 Online:2024-07-10 Published:2024-04-29
  • Contact: MIAO Jinling, NIE Yong, JIANG Xuchuan E-mail:chm_miaojl@ujn.edu.cn;Chm_niey@ujn.edu.cn;ism_jiangxc@ujn.edu.cn
  • Supported by:
    the Natural Science Foundation of Shandong Province, China(ZR2020MB001)

摘要:

通过四苯基乙烯甲醛与乙二胺的缩合反应及进一步还原和酸化, 合成了桥联氟代双四苯基乙烯化合物, 桥联基团分别为亚胺(化合物1和2)、 相应的胺(化合物3和4)和季铵盐(化合物5和6)基团. 氟代及不同的桥联基团和取代位置对产物的发光性质具有调控作用. 亚胺桥联产物(化合物1和2)固体的发光波长与四苯基乙烯(TPE)母体基本相同, 化合物2的发光量子产率(38%)比TPE(23%)高, 表明桥联结合氟代策略可以精确保持TPE的发光波长并提高发光强度. 研究了化合物1, 2, 5和6的力致发光变色性质以及化合物3和4的酸致发光变色性质. 使用化合物3制作的试纸可以便捷地利用发光颜色区分盐酸、 乙酸和三氟乙酸. 本文结果表明, 氟代-桥联策略可以通过参与分子内和分子间相互作用来调节TPE分子堆积和苯环的旋转, 协同精确调控此类化合物的发光和刺激响应性质.

关键词: 聚集诱导发光, 氟代, 桥联, 四苯基乙烯, 刺激响应

Abstract:

Six fluorinated bis-tetraphenylethene(bis-FTPE) compounds were synthesized through the condensation of tetraphenylethene-based formaldehyde and ethylenediamine and further reduction and then acidification. The bridging groups are imine(compounds 1 and 2), amine(compounds 3 and 4) and quaternary ammonium salt (compounds 5 and 6) moieties, respectively. It has been found that the fluorine atom(s), different bridging groups and substitution positions exhibit tuning effect on the luminescence properties of the compounds. The emission wavelengths of compounds 1 and 2 are essentially the same as that of the parent tetraphenylethene(TPE), and the luminescence quantum yield of compound 2(38%) is higher than that of TPE(23%), indicating that the bridge/ fluorination strategy can precisely maintain the emission wavelength of TPE while improving the emission intensity. Compounds 1, 2, 5 and 6 have mechanochromic luminescence properties and compounds 3 and 4 exhibit acidochromic luminescence properties. Paper strips made of compound 3 can readily distinguish hydrochloric acid, acetic acid and trifluoroacetic acid by the emission color. These results suggest that the fluorination/bridge strategy may be applied to synergistically and precisely tune the emission and stimulus-responsiveness properties of such compounds via intra- and intermolecular interactions to adjust the molecular packing and the rotations of the phenyl groups of these compounds.

Key words: Aggregation-induced emission, Fluorination, Bridging, Tetraphenylethene, Stimuli-responsiveness

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