Photochromic Property of Anionic Spiropyran with Sulfonate-substituted Indoline Moiety

For fabricating photoresponsive multifunctional materials, we have developed the potassium salt of a new anionic spiropyran, 1′,3′,3′-trimethyl-6-nitrospiro[2H-1-benzopyran-2,2′-indoline]-5′-sulfon...