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采用DCC缩合的方法,将吲哚啉螺苯并吡喃的衍生物和聚乙二醇相缩合,以聚乙二醇末端的羟基和吲哚啉螺苯并吡喃衍生物的羧基为反应活性基团,实现了带有羧基的螺吡喃类光致变色化合物支载到了聚乙二醇两端.通过引入亲水基团得到了水溶性较好的螺环类光致变色化合物.通过对产物的紫外-可见光谱的研究发现,产物具有良好的光致变色性质,在乙醇、丙酮和乙酸乙酯中皆具有良好的光致生色现象;产物可溶于水,在紫外光(波长365nm)照射时产生了光消色现象,具有明显的逆光致变色性质.该方法原料易得,反应条件容易控制,为光致变色新材料的研究和开发提供了新方法.
The method of DCC condensation is used to condense the derivative of indolinospirobenzopyran and the polyethylene glycol to react the carboxyl group at the terminal of the polyethylene glycol and the carboxyl group of the indoline spirobenzopyran derivative Group, the spiro-pyran photochromic compound with carboxyl group is supported on both ends of the polyethylene glycol, and a spiro-type photochromic compound with good water-solubility is obtained by introducing a hydrophilic group. The UV-Vis spectra of the product showed that the product has good photochromic properties and good photochromism in ethanol, acetone and ethyl acetate. The product is soluble in water and has excellent UV-vis (wavelength 365nm ) Has the phenomenon of light decolorization when irradiated, and has obvious reverse photochromic properties. The raw materials are easily obtained and the reaction conditions are easily controlled, thereby providing a new method for the research and development of new photochromic materials.