研究目的
To realize the selective detection of phase transformation during the evaporative crystallization of hexaphenylsilole (HPS) by exploiting its aggregation-induced emission (AIE) property.
研究成果
The study successfully demonstrated the use of AIE for selective detection of phase transformation during evaporative crystallization of HPS. It supports the two-step nucleation model and Ostwald’s rule of stages, providing insights into the molecular assembly process.
研究不足
The study is limited by the difficulty in completely transforming the crystalline to amorphous phase during evaporative crystallization. The method's applicability to other systems may vary depending on the AIE properties of the molecules involved.
1：Experimental Design and Method Selection:
The study utilized the AIE property of HPS to observe phase transformation during evaporative crystallization. Fluorescence spectral changes were monitored over time.
2：Sample Selection and Data Sources:
HPS was dissolved in 1,2-dichloroethane, and the solution was dropped on a glass substrate for observation.
3：List of Experimental Equipment and Materials:
A UV-LED (LC-L1V3, Hamamatsu Photonics K.K., λ = 365 nm, 0.040 mW) was used for excitation. Fluorescence changes were captured using an EOS KissX7i digital camera.
4：040 mW) was used for excitation. Fluorescence changes were captured using an EOS KissX7i digital camera.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The fluorescence spectral changes of HPS during solvent evaporation were measured as a function of time. The amorphous sample was prepared by rapid quenching of its melt.
5：Data Analysis Methods:
The fluorescence spectra were analyzed to distinguish between amorphous and crystalline phases. The time evolution of fluorescence intensity was fitted using a sigmoidal function.
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