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首页> 外文期刊>Journal of Materials Chemistry, C. materials for optical and electronic devices >Wavelength-dependent multicolor photochromism and fluorescence switching based on an AIE-active skeleton by regulating the conjugation of the photoactive unit
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Wavelength-dependent multicolor photochromism and fluorescence switching based on an AIE-active skeleton by regulating the conjugation of the photoactive unit

机译：通过调节光活性单元的共轭，基于AIE活性骨架的波长依赖性多色光学变色和荧光切换

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摘要

Organic photochromic materials present extraordinary value and exciting prospects in numerous photo-controlled practical applications; however, it is still a great challenge to achieve multiple-wavelength-controlled multicolor photochromism with dual-mode readout. Herein, we propose a general design strategy to achieve multicolor photochromic systems with dual-signaling color and fluorescence modes through a group of colorful photochromic compounds based on an AIE-active molecular skeleton. It is found that combining photochromic and fluorescent systems and designing the proper module composition of the functional subunits in an AIE-active molecule can regulate the molecule toward predominant photophysical emission or photochemical chromism in a controllable way, and multicolor photochromism can be accomplished using multicomponent mixtures with well-separated and individually addressable absorption bands by regulating the conjugation of the introduced photoactive units. The photo-triggered photochromism is attributed to the reversible cyclization/cycloreversion reaction, and the extended conjugation of the photoactive unit is the dominant contributor to the colorful coloration of the different chromophores, which ranges from red to blue. Variation of the conjugated structures of the photoactive unit not only endows these compounds with multiple-wavelength-triggered color control, but also enables the colored isomers to be decolored using visible light stimuli with distinct wavelengths, which allows the multiplexing optical systems to work in a more flexible and controllable way in advanced photo-controlled patterning and anti-counterfeiting applications.
机译：有机光致变色材料在许多光控实际应用中具有非凡的价值和令人兴奋的前景；然而，利用双模读出实现多波长控制的多色光致变色仍然是一个巨大的挑战。在此，我们提出了一种通用的设计策略，通过一组基于AIE活性分子骨架的彩色光致变色化合物，实现具有双信号颜色和荧光模式的多色光致变色系统。研究发现，将光致变色和荧光系统相结合，并设计AIE活性分子中功能亚基的适当模块组成，可以以可控的方式将分子调节为主要的光物理发射或光化学变色，通过调节引入的光活性单元的共轭，可以使用具有良好分离和单独寻址吸收带的多组分混合物实现多色光致变色。光引发的光致变色可归因于可逆的环化/环可逆反应，而光活性单元的延伸共轭是不同发色团（从红色到蓝色）彩色化的主要贡献者。光活性单元共轭结构的变化不仅赋予这些化合物以多波长触发的颜色控制，而且还使有色异构体能够使用具有不同波长的可见光刺激进行脱色，这使得多路复用光学系统在先进的光控图案化和防伪应用中以更灵活和可控的方式工作。

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    Zhou Shasha; Guo Sidan; Liu Weidong; Ding Riqing; Sun Huili; Chen Jianrong; Qian Zhaosheng; Feng Hui;

  • 作者单位

    Zhejiang Normal Univ Key Lab Minist Educ Adv Catalysis Mat Yingbin Rd 688 Jinhua 321004 Zhejiang Peoples R China;

    Zhejiang Normal Univ Key Lab Minist Educ Adv Catalysis Mat Yingbin Rd 688 Jinhua 321004 Zhejiang Peoples R China;

    Zhejiang Normal Univ Key Lab Minist Educ Adv Catalysis Mat Yingbin Rd 688 Jinhua 321004 Zhejiang Peoples R China;

    Zhejiang Normal Univ Key Lab Minist Educ Adv Catalysis Mat Yingbin Rd 688 Jinhua 321004 Zhejiang Peoples R China;

    Zhejiang Normal Univ Key Lab Minist Educ Adv Catalysis Mat Yingbin Rd 688 Jinhua 321004 Zhejiang Peoples R China;

    Zhejiang Normal Univ Key Lab Minist Educ Adv Catalysis Mat Yingbin Rd 688 Jinhua 321004 Zhejiang Peoples R China;

    Zhejiang Normal Univ Key Lab Minist Educ Adv Catalysis Mat Yingbin Rd 688 Jinhua 321004 Zhejiang Peoples R China;

    Zhejiang Normal Univ Key Lab Minist Educ Adv Catalysis Mat Yingbin Rd 688 Jinhua 321004 Zhejiang Peoples R China;

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  • 正文语种 eng
  • 中图分类 物理化学（理论化学）、化学物理学;
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