Abstract
Indoline spiropyran containing an σ-acceptor chlorine atom in 6′ position of the 2H-chromene part of the molecule was synthesized and studied. The use of 1,2,3,3-tetramethyl-3H-indolium perchlorate as a starting compound made it possible to achieve higher product yields as compared to previous studies. The molecular structure of the compound was established by single crystal X-ray diffraction analysis. The features of the crystal structure and intermolecular interactions were investigated using CrystalExplorer17 software package. The photochromic behavior in acetonitrile solution was studied for the first time. It was found that the merocyanine form of spiropyran is characterized by an absorption maximum at 592 nm, which is 37 nm closer to the range of the “biological window” in comparison with the nitro-substituted analog.
摘要
合成并研究了在分子 2H-Cromene 部分的 6′ 位含有一个 σ 受体氯原子的吲哚啉螺吡喃。与以前的研究相比,使用 1,2,3,3-四甲基-3H-吲哚鎓高氯酸盐作为起始化合物可以获得更高的产物收率。通过单晶 X 射线衍射分析,确定了该化合物的分子结构。利用 CrystalExplorer17 软件包研究了晶体结构的特征和分子间的相互作用。首次研究了乙腈溶液中的光致变色行为。研究发现,经花青素形式的螺吡喃在 592 纳米波长处具有吸收最大值,与硝基取代的类似物相比,其吸收最大值距离 "生物窗口 "范围更近 37 纳米波长。