A rapid and reversible thermochromic supramolecular polymer hydrogel and its application in protected quick response codes,Materials Chemistry Frontiers

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A rapid and reversible thermochromic supramolecular polymer hydrogel and its application in protected quick response codes
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2020/01/08 , DOI: 10.1039/c9qm00699k
Bo Li _{1,

2,

3,

4,

5} , Cuiling Lin _{1,

2,

3,

4,

5} , Chenjie Lu _{1,

2,

3,

4,

5} , Jinjin Zhang _{1,

2,

3,

4,

5} , Tian He _{1,

2,

3,

4,

5} , Huayu Qiu _{1,

2,

3,

4,

5} , Shouchun Yin _{1,

2,

3,

4,

5}

Affiliation

A rapid and reversible thermochromic fluorescent supramolecular polymer hydrogel was prepared via orthogonal self-assembly involving host–guest interactions and metal coordination interactions. This supramolecular polymer hydrogel exhibits responsiveness to multiple stimuli induced by competitive ligands and temperature, and excellent self-healing properties after being destroyed by external forces. Furthermore, the introduction of TPE units into the supramolecular hydrogel endows it with bright blue fluorescence, satisfying the demand for protected quick response (QR) codes with improved durability and security. A three-dimensional QR code was then constructed using this blue-light-emitting fluorescent supramolecular polymer hydrogel, which could hide information under natural light at high temperature or in the presence of competitive ligands, but display it under UV light irradiation at low temperature. Therefore, the QR code information is in a protected state and can only be read under specific conditions. Moreover, due to the dynamic reversibility of non-covalent interactions, the protected QR code also shows excellent self-healing performance after being destroyed.

中文翻译：

快速可逆的热致变色超分子聚合物水凝胶及其在受保护的快速响应代码中的应用

一种快速可逆的热致变色荧光超分子聚合物水凝胶是通过正交自组装涉及主客体相互作用和金属配位相互作用。这种超分子聚合物水凝胶显示出对竞争性配体和温度诱导的多种刺激的响应，并在被外力破坏后具有出色的自愈特性。此外，将TPE单元引入超分子水凝胶使其具有明亮的蓝色荧光，从而满足了对具有增强的耐用性和安全性的受保护快速响应（QR）码的需求。然后，使用这种发射蓝光的荧光超分子聚合物水凝胶构建了三维QR码，该QR码可以在高温自然光下或存在竞争性配体的情况下隐藏信息，但在低温下的紫外线照射下可以显示信息。因此，QR码信息处于受保护状态，只能在特定条件下读取。此外，由于非共价相互作用的动态可逆性，受保护的QR码在被破坏后也显示出出色的自我修复性能。

更新日期：2020-03-05

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