School of Chemistry and Chemical Engineering, Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, Huazhong University of Science and Technology, Wuhan, 430074, China.
Macromol Rapid Commun. 2022 Sep;43(18):e2200242. doi: 10.1002/marc.202200242. Epub 2022 Apr 21.
Fluorescent supramolecular polymers combine the benefits of supramolecular polymers in terms of dynamic nature with the optoelectronic features of incorporated fluorophores. However, the majority of fluorescent supramolecular polymers can only exhibit a single fluorescent state, restricting their applications. Incorporating J-type dyes into supramolecular monomers is expected to impart supramolecular polymers with variable fluorescence colors, because the aggregation mode of J-type dyes is closely related to the formation of supramolecular polymers. Herein, the authors report a supramolecular polymer [M1·Zn(OTf) ] , in which the monomer M1 contains a J-type dye, oligo(p-phenylene vinylene) derivative, and two terpyridine ends. The M1 + Zn(OTf) solutions exhibit fluorescence color changes varying from cyan to yellow-green in the monomer concentration ranging from 0.04 to 1.00 mm. Moreover, based on the outputs from laser scanning confocal microscopy, the fluorescence color transition during the formation of supramolecular polymers is intuitively proven. Additionally, considering the close relationship between the supramolecular polymer structure and the fluorescence color, the fluorescence color can be regulated by introducing tetraethylammonium hydroxide that can bind with Zn competitively to break up the structure of the supramolecular polymer.
荧光超分子聚合物结合了超分子聚合物在动态性质方面的优势以及所包含荧光团的光电特性。然而，大多数荧光超分子聚合物只能呈现单一的荧光状态，限制了它们的应用。将 J-型染料引入超分子单体有望赋予超分子聚合物可变的荧光颜色，因为 J-型染料的聚集模式与超分子聚合物的形成密切相关。在此，作者报道了一种超分子聚合物 [M1·Zn(OTf) ] ，其中单体 M1 含有 J-型染料、寡聚（对亚苯基乙烯基）衍生物和两个三吡啶端。在单体浓度为 0.04 至 1.00 mM 的范围内，M1 + Zn(OTf) 溶液的荧光颜色从青色变为黄绿色。此外，基于激光扫描共聚焦显微镜的输出，直观地证明了在超分子聚合物形成过程中荧光颜色的转变。此外，考虑到超分子聚合物结构与荧光颜色之间的密切关系，可以通过引入四乙氢氧化铵来调节荧光颜色，四乙氢氧化铵可以与 Zn 竞争结合，从而破坏超分子聚合物的结构。
