非共价相互作用
分子间力
材料科学
荧光
超分子化学
氢键
准分子
单体
纳米技术
分子
超分子聚合物
自组装
化学物理
光化学
聚合物
化学
有机化学
光学
复合材料
物理
作者
Xiangyu Zhang,Shiyin Wang,Zhiyuan Fu,Qianqian Wang,Zhiqiang Yang,Ying Gao,Haichao Liu,Shitong Zhang,Cheng Gu,Bing Yang
标识
DOI:10.1002/adfm.202301228
摘要
Abstract Noncovalent fluorescence switching materials with specific molecular packing motifs for desired performance are difficult to design accurately due to the complexity of intermolecular interactions. Herein, a noncovalent interaction competition strategy to design fluorescence‐switching materials by fine‐modulating hydrogen‐bond and π–π interactions is proposed. Hydrogen bonds are generated by nitrogen/oxygen‐containing units while π–π interactions are generated between polycyclic aromatic hydrocarbons. After these two interactions are balanced in strength, they attempt to induce the formation of respective molecule assemblies stably under controllable conditions. Through thermal stimulus produced by a laser, a reversible assembly transition with high‐contrast monomer‐to‐excimer fluorescence switching is achieved, which demonstrates promising applications in rewritable optical recording and time‐dependent anti‐counterfeiting. This strategy provides a crucial step toward the controllable switching of supramolecular assembly for information handling.
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