Contradiction or Unity? Thermally Stable Fluorescent Probe for In Situ Fast Identification of Self-sort or Co-assembly of Multicomponent Gelators with Sensitive Properties
Contradiction or Unity? Thermally Stable Fluorescent Probe for In Situ Fast Identification of Self-sort or Co-assembly of Multicomponent Gelators with Sensitive Properties
复制标题
矛盾还是统一？
DOI：
10.1021/acsami.0c21630
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发表时间：
2021-02-09
影响因子：
9.5
通讯作者：
Wang, Xu
中科院分区：
文献类型：
--
作者：
An, Zhihang;Shan, Tianyu;Wang, Xu
分析多组分凝胶剂的组装模式对于理解其组装规则并精确操纵其分子结构以形成定制的多功能超分子凝胶非常重要。但缺乏快速原位识别技术来推断组装模式是自排序系统还是共组装系统。为了开发一种广泛适用的稳定且灵敏的荧光探针来推断组装模式，我们设计并合成了多个外围官能团四苯乙烯（TPE）修饰的明确的立方核多面体低聚倍半硅氧烷（POSS）三维（3D）树枝状聚合物。 POSS-TPE在较宽的温度范围内孵育后可以形成热稳定的自组装结构，所产生的特殊的热稳定光致发光（PL）强度为荧光探针提供了新的可能性。然后，POSS-TPE 灵敏地捕获凝胶网络提供的有限空间的机械应力变化，并通过比较自排序或共组装系统的机械应力变化规律来推断组装模式。因此，本研究扩大了荧光探针在组装领域的应用。未来，这种广泛应用的荧光探针将有助于开发由多组分凝胶组成的超分子组装材料。
Analyzing the assembly patterns of multicomponent gelators is important for understanding their assembly rules and precisely manipulating their molecular structure to form a tailored multifunctional supramolecular gel. But the fast in situ recognition technology to infer whether the assembly pattern is a self-sorting or co-assembled system is lacking. For developing a widely applicable stable and sensitive fluorescent probe to infer assembly patterns, we design and synthesize the multiple peripheral functional group tetraphenylethene (TPE) modified well-defined cubic core polyhedral oligomeric silsesquioxane (POSS) three-dimensional (3D) dendrimer. POSS-TPE can form a thermally stable self-assembly structure after being incubated in a wide temperature range, and the resultant special thermally stable photoluminescence (PL) intensity provides a novel possibility of fluorescent probe. Then, POSS-TPE sensitively catches the mechanical stress changes of the confined space provided by the gel networks and infers the assembly patterns by comparing the mechanical stress change laws of a self-sorting or coassembled system. So, the application of fluorescent probe in assembly fields is enlarged in this research. In the future, this widely applicable fluorescent probe will be helpful to develop supramolecular assembly materials consisting of multicomponent gels.