PHOTO- AND THERMOCHROMIC SPIRANS. 36. SYNTHESIS, STRUCTURE AND PHOTOCHROMIC PROPERTIES OF 7',7"-{1,4-PHENYLENEDI(METHYLENE)-BIS(5-CHLORO-1,3,3-TRIMETHYL-1,3-DIHYDROSPIRO[INDOLE-2,3'-PYRANO[3,2- f ]QUINOLINIUM])} DIIODIDE

Abstract

A synthesis is reported for a new photochromic indoline bisspiropyran salt containing a quinoline fragment. This compound exists as a racemic mixture. The photochromic properties of this symmetrical bisspiropyran were studied. Authors: K. N. Khalanskiy, Yu. S. Alekseenko, B. S. Lukyanov, G. S. Borodkin, and S. O. Bezuglyi. English Translation in Chemistry of Heterocyclic Compounds , 2012, 48 (7), pp 1090-1097 http://link.springer.com/article/10.1007/s10593-012-1114-z