Return to Article Details 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-<i>f</i>]QUINOLINIUM])} DIIODIDE Download Download PDF