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
摘要:
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.