Electrofluorochromism has attracted great attention due to the intelligence optoelectronic and sensing applications. The intrinsically switchable fluorophores with high solid-state fluorescence are regarded as key for ideal electrofluorochromic materials. Here, we reported an AIE-active polyamide with diphenylamine and tetraphenylethylene units, showing high fluorescence quantum yield up to 69.1% for the solid polymer film and stable electrochemical cycling stability. The polyamide exhibited reversible color and emission switching even in hundreds of cycles, and the fluorescence on/off contrast ratio was determined up to 417, which is the highest value to our knowledge. Furthermore, as the response time is vital for the real-life applications, to speed up the response of electrofluorochromism, a porous polymer film was readily prepared through a facile method, notably exhibiting high fluorescence contrast, long-term stability and obviously improved response, due to the sharply increased surface area. Therefore, the AIE-functionalization combining the porous structure strategy will synergistically and dramatically improve the electrofluorochromic performance, which will also promote their practical applications in the near future.

中文翻译：

---

具有优异的电致变色性能的含二苯胺-TPE部分的AIE活性聚酰胺

由于智能光电和传感应用，电致变色现象已经引起了极大的关注。具有高固态荧光的内在可切换的荧光团被认为是理想的电致变色材料的关键。在这里，我们报道了具有二苯胺和四苯基乙烯单元的AIE活性聚酰胺，对于固体聚合物薄膜显示出高达69.1％的高荧光量子产率，并且具有稳定的电化学循环稳定性。聚酰胺甚至在数百个循环中仍显示出可逆的颜色和发射切换，并且确定的荧光开/关对比度高达417，这是我们所知的最高值。此外，由于响应时间对于现实生活中的应用至关重要，因此要加快电荧光致变色的响应，通过容易的方法可以容易地制备多孔聚合物膜，由于表面积急剧增加，该聚合物膜表现出高荧光对比度，长期稳定性和明显改善的响应。因此，结合多孔结构策略的AIE-官能化将协同并显着改善电氟致变色性能，这也将在不久的将来促进其实际应用。