Cholesterol-substituted spiropyran: Photochromism, thermochromism, mechanochromism and its application in time-resolved information encryption,Journal of Colloid and Interface Science

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Cholesterol-substituted spiropyran: Photochromism, thermochromism, mechanochromism and its application in time-resolved information encryption
Journal of Colloid and Interface Science ( IF 9.4 ) Pub Date : 2024-03-21 , DOI: 10.1016/j.jcis.2024.03.129
Leilei Hu ₁ , Yangyang Gao ₁ , Qihong Cai ₁ , Youhao Wei ₁ , Jiangkun Zhu ₁ , Wei Wu ₁ , Yuhui Yang ₂

Affiliation

Organic multi-stimulus-responsive materials are widely used in anti-counterfeiting and information encryption due to their unique response characteristics and designability. However, progress in obtaining multi-stimulus-responsive smart materials has been very slow. Herein, a spiropyran derivative is constructed, which shows photochromic, thermochromic and mechanical photochromic properties, and has reversible absorption/luminescence adjustment ability. By introducing non-covalent interactions such as van der Waals force and hydrogen bond, this new molecule is more sensitive to external stimuli and exhibits better photochromic, mechanochromic and thermochromic properties with rapid speed and high contrast. Furthermore, these three stimulus responses can be completely restored to the initial state under white light irradiation. The reversible multiple response characteristics of this molecule make it possible to provide dynamic anti-counterfeiting and advanced information encryption capabilities. To demonstrate its application in advanced information encryption, powders treated with different stimuli are combined with fluorescent dyes to encrypt complex digital information. This work puts forward a new time-resolved encryption strategy, which provides important guidance for the development of time-resolved information security materials.

中文翻译：

胆固醇取代螺吡喃：光致变色、热致变色、力致变色及其在时间分辨信息加密中的应用

有机多刺激响应材料因其独特的响应特性和可设计性而广泛应用于防伪和信息加密领域。然而，获得多刺激响应智能材料的进展非常缓慢。本文构建了一种螺吡喃衍生物，其表现出光致变色、热致变色和机械光致变色特性，并具有可逆吸收/发光调节能力。通过引入范德华力和氢键等非共价相互作用，这种新分子对外部刺激更加敏感，并以快速和高对比度表现出更好的光致变色、机械致变色和热致变色性能。而且，这三种刺激反应在白光照射下都可以完全恢复到初始状态。该分子的可逆多重响应特性使其能够提供动态防伪和先进的信息加密能力。为了展示其在高级信息加密中的应用，将经过不同刺激处理的粉末与荧光染料结合起来，以加密复杂的数字信息。该工作提出了一种新的时间分辨加密策略，为时间分辨信息安全材料的开发提供了重要指导。

更新日期：2024-03-21

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