Abstract:

Combined with the application of powder X-ray diffraction technology in the field of phase analysis, a comprehensive and innovative experiment was designed. The experimental contents mainly include the use of powder X-ray diffraction to monitor the structural transformation of excited-state intramolecular proton transfer (ESIPT) organic molecule 5-(2-(5-fluoro-2-hydroxyphenyl)-4, 5-bis(4-fluorophenyl)-1H-imidazol-1-yl)isophthalic acid (H₂hpi2cf) under fumigation of solvents. This experiment comprehensively cultivates students' operation skills and data processing and analysis ability of powder X-ray diffraction, and improves students' ability to use modern scientific instruments to solve practical problems.

Key words: Powder X-ray diffraction, Structural transformation, Excited-state intramolecular proton transfer, Photoluminescent organic molecule, Comprehensive innovative experiment