吡咯取代的杂环俘精酸酐的合成及溶剂对其吸收光谱的影响

Synthesis and Solvent Effect on Absorption Spectra of Pyrryl Substituted Fulgides

合成了五个新的3-乙酰基吡咯衍生物,以它们为原料,进一步合成了五个新的吡咯取代的俘精酸酐。研究了五个俘精酸酐化合物在不同溶剂中的光致变色性能,考察了溶剂极性对俘精酸酐及其光致变色反应产物(7,7a-二氢吲哚衍生物)吸收光谱的影响,结果表明,随溶剂极性的增加吸收光谱发生红移。对7,7a-二氢吲哚衍生物的影响远比对俘精酸酐本身的影响显著的多。

Five new 3-Acetyl pyrrole derivatives and five new corresponding pyrryl substitutedfulgides: E-(α)-(3-substituted pyrryl) ethylidene (isopropylidene) succinic anhydrides (3a～e)were synthesized. The photochromic properties of all synthesized fulgides in varioussolvents were studied. The solvent effects on the absorption spectra of fulgides and theircoloured forms (7, 7a-dihydroindole derivatives) were also investigated. It was foundthat the absorption maxmium of the 7, 7a-dihydroindole derivative exhibites muchstronger bathchromic shift than that of fulgide with the increasing of the polarity of the solvents.