Reversible Chromatic Change of Supramolecular Gels for Visual and Selective Chiral Recognition of Histidine,ACS Applied Bio Materials

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Reversible Chromatic Change of Supramolecular Gels for Visual and Selective Chiral Recognition of Histidine
ACS Applied Bio Materials ( IF 4.6 ) Pub Date : 2020-10-01 , DOI: 10.1021/acsabm.0c01063
Xuemei Xu ₁ , Xueman Zhou _{2,

3} , Lang Qu ₁ , Lei Wang ₁ , Jintong Song ₁ , Dehua Wu ₁ , Weilan Zhou ₁ , Xiangge Zhou ₁ , Haifeng Xiang ₁ , Jun Wang ₂ , Jin Liu ₃

Affiliation

In the present work, a chemical reaction has been performed for supramolecular gels to achieve multiple-stimuli-responsive smart soft materials. Simple chiral binaphthalene-based receptors can condense with histidine (His) to yield a Schiff base, which would help to achieve visual chiral recognition of unprotected l/d-His through gel formation along with specific selectivity toward 20 amino acids. Through intermolecular hydrogen bonds, the resultant Schiff base molecules assemble with excess His molecules to form three-dimensional (3D) networks of metastable cross-linked nanospheres and stable nanofibers in EtOH/water and MeOH/water, respectively. Significantly, this condensation reaction exhibits unique reversible and chromatic phenomena between sol–gel phase transitions in EtOH/water, which provide a way to design chemical reaction-based multivisual-change supramolecular gels for sensing and switching applications.

中文翻译：

用于组氨酸视觉和选择性手性识别的超分子凝胶的可逆色变

在目前的工作中，已经对超分子凝胶进行了化学反应，以实现多刺激响应的智能软材料。简单的手性联萘基受体可以与组氨酸 (His) 缩合产生席夫碱，这将有助于实现对未受保护的l / d -His的视觉手性识别通过凝胶形成以及对 20 种氨基酸的特定选择性。通过分子间氢键，所得席夫碱分子与过量的 His 分子组装，分别在 EtOH/水和 MeOH/水中形成亚稳态交联纳米球和稳定纳米纤维的三维 (3D) 网络。值得注意的是，这种缩合反应在 EtOH/水中的溶胶-凝胶相变之间表现出独特的可逆和彩色现象，这为设计用于传感和开关应用的基于化学反应的多视觉变化超分子凝胶提供了一种方法。

更新日期：2020-10-21

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