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以溴代十六烷、2,4-二羟基苯甲醛、苯胺、对苯二胺、联苯二胺为原料,经醚化和席夫碱反应合成中间体和新颖的具有芳香间隔基Gemini型席夫碱化合物以及相应的单体化合物。通过核磁共振、元素分析等对化合物的结构进行表征。利用紫外光谱和红外光谱研究了目标产物的间隔基效应和酸致变色性能。结果表明,随间隔基的变化,席夫碱衍生物的光谱性质发生了明显的变化。由于在溶液与浇铸膜中组装模式的不同,化合物的酸致变色的程度表现出明显的差异,具有广阔的应用前景。
The intermediates were synthesized by the reaction of etherification and Schiff base with bromohexadecane, 2,4-dihydroxybenzaldehyde, aniline, p-phenylenediamine and biphenylenediamine. The novel intermediates with aromatic spacer Gemini Schiff base compounds and corresponding monomeric compounds. The structure of the compound was characterized by nuclear magnetic resonance, elemental analysis and the like. The spacers and acidochromism of the target product were studied by UV and FTIR spectroscopy. The results showed that with the change of spacer, the spectral properties of Schiff base derivatives changed significantly. Due to the different assembly modes in the solution and the cast film, the degree of acid induced discoloration of the compounds shows obvious differences and has broad application prospects.