Synthesis and Photochromism of Indolinospirochromenes with Condensed Fragments in the Indoline Part of the Molecules

Article abstract of DOI:10.1007/BF00475577

Indoline spirochromenes with condensed fragments in the indoline part of the molecules were synthesized.All of the compounds have photochromic properties.The introduction of a condensed fragment into the indoline part of the molecule leads to a bathochromic shift of both the long-wave and short-wave absorption bands of the photomerocyanine; the rate of the dark reaction does not change.