报道科学研究了一种蒽类衍生物TPE-An具有明显的力致变色行为与聚集诱

It is reported that a anthracene derivative, TPE-An, has been scientifically studied and has obvious mechanochromic behavior and aggregation-induced fluorescence characteristics (as shown in Figure 2-3). After milling, the fluorescence emission wavelength shows a clear red shift (506nm to 574nm) According to the statistical analysis of XRD and DSC data, the reversible morphological change from crystalline form to amorphous form resulted in the compound TPE-An having a force-induced discoloration behavior. The four styrene parts at both ends have strong steric hindrance, resulting in a distorted molecular conformation and weak π-π interaction between the molecules, resulting in a relatively loose molecular stack. When stimulated by external forces, its molecular conformation may be planarized or slipped. At the same time, the enhancement of the conjugated chain of the molecule causes the ground state energy to decrease, which causes the absorption spectrum of the molecule to be red-shifted. the result shows. The planarization of the molecule is the reason for the TPE-An compound's mechanochromic properties

It is reported that a scientific study of a fern derivative TPE-An has obvious force discoloration behavior and aggregate induced fluorescence characteristics (Figure 2-3), after grinding fluorescence emission wavelength appears significant red shift (506nm to 574nm), after XRD and DSC data statistical analysis, the crystal to amorphous morphological changes lead to the compound TPE-An has force-induced discoloration behavior. The four-styrene parts at both ends have strong spatial bit resistance, resulting in a distorted molecular structure of the molecule and a weak argon-thorade between the molecules, resulting in a relatively loose molecular build-up of the molecules. When there is external force stimulation, its molecular conformation may be flat or sliding. At the same time, the enhancement of the conjugate chain of the molecule leads to the reduction of the base state energy, which causes the molecule to absorb the spectral redshift. The results show. Causes of force discoloration properties of the compound TPE-An of the flat to the compound of the molecule

A kind of anthracene derivative tpe-an has been reported in this paper. It has obvious mechanochemical behavior and aggregation induced fluorescence characteristics (as shown in Fig. 2-3). After being milled, the fluorescence emission wavelength shows obvious red shift (506nm to 574nm). Through the statistical analysis of XRD and DSC data, the reversible morphological change from crystal to amorphous leads to the mechanochemical behavior of tpe-an. The strong steric hindrance of tetrastyrene at both ends leads to a distorted molecular conformation and a weak π - π interaction between molecules, which leads to a relatively loose molecular packing. When there is external force stimulation, the molecular conformation may be planarized or slip. At the same time, the enhancement of the conjugated chain of the molecule results in the decrease of the ground state energy and the red shift of the absorption spectrum. The results show that. The reason why the molecular planarization is the mechanochemical property of TPE an