Organic fluorescent materials have attracted extensive interests due to their wide applications. However, many organic fluorescent materials are single functional and suffer from complicated synthesis and purification, which significantly limits their practical applications. Herein, a multifunctional tetraphenylethene-based Schiff base (TPESB) was designed via a combination of AIE and ESIPT mechanisms and facilely developed through a one-pot reaction of two commercially available compounds, which exhibit dramatic absorption/fluorescence dual-mode color changes induced by water and zinc ions. By employing TPESB as an imaging layer and water as an ink, an eco-friendly inkless rewritable paper was developed showing great potential application in anti-counterfeiting and information security. Moreover, TPESB can serve as a colorimetric/fluorescent dual-channel sensor for Zn²⁺ ions with high sensitivity, high selectivity, fast response time, and low detection limit (38.9 nM). Additionally, TPESB displays low cytotoxicity and has been successfully applied for sensing of Zn²⁺ in living cells. The presented strategy will provide a reference for developing multifunctional materials and expanding their wider application fields.

中文翻译：

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多功能AIE-ESIPT双机理基于四苯乙烯的席夫碱，用于无墨可重写纸和比色/荧光双通道Zn2 +传感器

有机荧光材料由于其广泛的应用而引起了广泛的兴趣。然而，许多有机荧光材料是单功能的并且遭受复杂的合成和纯化，这极大地限制了它们的实际应用。本文中，通过结合AIE和ESIPT机理设计了多功能的基于四苯乙烯的席夫碱（TPESB），并通过一锅法反应两种可商购获得的化合物进行了轻松开发，这些化合物表现出显着的吸收/荧光双模颜色变化，水和锌离子。通过使用TPESB作为成像层和水作为油墨，开发了一种环保型无墨可重写纸，在防伪和信息安全方面具有巨大的潜在应用前景。此外，TPESB可以用作Zn ²⁺离子的比色/荧光双通道传感器，具有高灵敏度，高选择性，快速响应时间和低检测限（38.9 nM）。另外，TPESB显示出低细胞毒性，并已成功应用于感测活细胞中的Zn ²⁺。提出的策略将为开发多功能材料及其扩展广泛的应用领域提供参考。