研究目的
To obtain highly efficient blue-violet light conversion agents used for agricultural film based on structure optimization of TPA.
研究成果
Ph4TPA has potential application value as blue-violet light conversion agent in winter, and preparation of crystalline nanoparticles and dispersion of Ph4TPA in polymer matrix will be very important to further improve the efficiency of light conversion and photostability. Occupation of active site will offer theoretical guidance and practical reference for next step molecular design of light conversion agents for agricultural film.
研究不足
The luminogens suffer from serious decreasing PLQY in doping film compared with crystalline state. The fluorescence intensity of the doping films drops significantly after outdoor exposure to sunlight in summer for one month due to the ring-closing oxidation reaction.
1:Experimental Design and Method Selection:
Six triarylacrylonitrile derivatives and their doping films were prepared to explore highly efficient blue-violet light conversion agents. The methodology included UV-vis absorption and fluorescence spectra analysis, X-ray single crystal diffraction analysis, and aggregation-induced emission activity tests.
2:Sample Selection and Data Sources:
The samples included six triarylacrylonitrile derivatives and their doping films. Data were acquired through UV-vis spectrophotometry, fluorescence spectrophotometry, and X-ray single crystal diffraction.
3:List of Experimental Equipment and Materials:
UV-vis spectra were determined on a Mapada UV-3200pcs spectrophotometer. Fluorescence measurements were taken on Agilent Cary Eclipse fluorescence spectrophotometer. 1H NMR and 13C NMR spectra were obtained with a Varian inova instrument at 400 MHz and 100 MHz.
4:Experimental Procedures and Operational Workflow:
The luminogens were prepared and their photophysical properties were investigated. The mechanical properties of doping films and PVC blank film were studied. Photodegradation experiments were carried out by a 300W xenon lamp.
5:Data Analysis Methods:
The absolute PLQYs of the luminogens were obtained in crystalline state and PVC film by adopting integrating sphere method, and the relative PLQYs in different solvents were calculated by using quinine sulphate as a standard.
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