Discussing and developing force-responsive and force-inducing smart materials at the nanoscale and molecular level, especially force-induced discoloration materials, is an urgent research area that needs to be developed, expanded, and innovative. Based on the compounds of different amino acids as the building blocks, Jia Xinru's research group at the School of Chemistry and Molecular Engineering of Peking University studied the force-induced fluorescence discoloration behavior of these compounds, and explored the relationship between molecular structure, molecular assembly arrangement and fluorescent properties. A series of progress has been made. In their research, they found that under the action of external forces, compounds that use amino acids as building blocks can undergo fluorescent color changes, which is different from the color change mechanism based on the conversion of monomers to exciplexes. An example of force-induced fluorescence discoloration caused by transition between objects, which further expands the mechanism covered by force-induced fluorescence discoloration (Mingjun Teng, Xinru Jia *, et al. Chem. Commun. 2011, 47, 6078–6080). Chem. Commun. 2011, 47, 6078–6080 Adv. Mater. 2012, 24, 1255–1261 Based on the above research, they used phenylalanine and aspartate as building blocks to prepare pyrene-containing compounds. The compound has the rare dual adjustable properties of fluorescence color and intensity, which is of great significance for expanding the application range of such materials (Mingjun Teng, Xinru Jia *, et al. Adv. Mater. 2012, 24, 1255–1261 ). They further combined the changes of molecular assembly structure and mechanochemical reaction under the action of external force, and prepared co-aggregates by co-assembly. Under the action of external force, the blue, green and red colors of the co-aggregates are changed. Using this method, the preparation of force-induced multicolor fluorescence change materials is a new discovery of this research group (Mingjun Teng, Xinru Jia *, et al. Angew. Chem. Int. Ed. 2012, 51, 6398-6401). Angew. Chem. Int. Ed. 2012, 51, 6398-6401 Recently, the research group achieved the first three-color change of a single molecule under the action of external force. This work was recently published in Angew. Chem. Int. Ed. (Zhiyong Ma, Xinru Jia *, et al. DOI: 10.1002 / anie.201306503), and was selected as the "frontispiece" article by Angew. Angew. Chem. Int. Ed. (DOI: 10.1002 / anie.201306503) Related work has been supported by the National Natural Science Foundation of China and the Ministry of Science and Technology and supported by Peking University. Filling Factory Turnkey Solution Filling Factory,Filling Factory Turnkey Solution,Intelligent Factory Filling Workshop Project,Automated Warehouse And Packaging Integration Changchun Rochiev Intelligent Equipment Manufacturing Co., Ltd. , https://www.rochiev-en.com
