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在无水乙醇溶液中,用苯胺、对硝基苯胺分别与水杨醛反应合成了两种席夫碱化合物水杨醛缩苯胺、水杨醛缩对硝基苯胺,通过元素分析、红外光谱的表征确定了产物的分子结构。研究了水杨醛缩苯胺和水杨醛缩对硝基苯胺的荧光性质,结果表明,两个化合物在甲醇、无水乙醇、丙酮、DM F溶液中能够发射荧光。水杨醛缩苯胺在所有溶液中、水杨醛缩对硝基苯胺在丙酮、DM F溶液中的发光机理均为π*→n发光。水杨醛缩对硝基苯胺在甲醇、无水乙醇溶液中具有良好的光致变色性能,其变色过程是由烯醇式结构向酮式结构转变,阐明了基于分子内的质子转移的光致变色机理。
In absolute ethanol solution, aniline and p-nitroaniline were respectively reacted with salicylaldehyde to synthesize two Schiff base compounds, salicylaldehyde aniline and salicylaldehyde reduced p-nitroaniline. Through elemental analysis and IR Characterization confirmed the molecular structure of the product. Fluorescent properties of salicylaldehyde aniline and salicylaldehyde p-nitroaniline were studied. The results showed that the two compounds could emit fluorescence in methanol, absolute ethanol, acetone and DMF solution. Salicylaldehyde Aniline In all solutions, the luminescence mechanism of salicylaldehyde-reduced p-nitroaniline in acetone and DM F solution is all π * → n luminescence. Salicylaldehyde reduced p-nitroaniline has good photochromism in methanol and absolute ethanol solution. The color change process is from enol structure to keto structure, and the photoluminescence based on intramolecular proton transfer Color mechanism.