Hydrogels locked by molecular recognition aiming at responsiveness and functionality
Hydrogels locked by molecular recognition aiming at responsiveness and functionality
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通过分子识别锁定水凝胶，旨在提高响应性和功能性
DOI：
10.1039/c2py20693e
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发表时间：
2013-02
影响因子：
4.6
通讯作者：
Jiang, Ming
中科院分区：
文献类型：
--
作者：
Liao, Xiaojuan;Chen, Guosong;Jiang, Ming
分子识别原理起源于锁和钥匙的概念，是现代化学和生物学的基石之一。生物分子或合成分子中的分子识别导致非共价键，其具有响应性、可逆性和竞争性，不同于共价键。因此，最近，这一概念已被引入并应用于功能材料领域，并取得了巨大成功。在这篇综述中，这些材料将从分子识别的角度进行研究，而不考虑所涉及的结合对的起源。首先，详细讨论了分子识别锁定水凝胶的结构特征，重点讨论了相互作用对和相应聚合物的化学结构和构型。由于新型水凝胶材料继承了非共价相互作用的可逆优势以及主体-客体或配体-受体对的特异性，因此在本文的第二部分中讨论了它们对各种刺激的相应响应。与响应性聚合物智能材料相比，分子识别锁定水凝胶的特点是通过改变其化学结构、密度位置和与聚合物主链的连接化学等，通过复杂的相互作用位点设计来精确控制对各种环境刺激的响应性。最后，简要描述了这些水凝胶的代表性应用。
The principle of molecular recognition originating from the concept of lock-and-key has been one of the foundation stones for modern chemistry and biology. Molecular recognition in either biomolecules or synthetic molecules leads to non-covalent linkages, which are featured by responsiveness, reversibility and competition, differing from the covalent bonds. Therefore, recently, this concept has been introduced to and employed in the field of functional materials with great success. In this review, these materials will be examined from the molecular recognition point of view, without considering the origins of the binding pairs involved. First, the structural characters of hydrogels locked by molecular recognition are discussed in detail with emphasis on the chemical structure and architectures of the interaction pairs and the corresponding polymers. As the new hydrogel materials inherit the reversible advantages from non-covalent interactions as well as the specificities of the host–guest or ligand–acceptor pairs, their corresponding responses to various stimuli are discussed in the second part of this review. Compared to the smart materials made of responsive polymers, the hydrogels locked by molecular recognition are featured by the precise control of the responsiveness to various environmental stimuli via sophisticated design of the interaction sites by changing their chemical structures, density location and linking chemistry to the polymer backbones etc. Finally, representative applications of these hydrogels are briefly described.
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