Mg. Fan et al., ACIDICHROMICS OF PHOTOCHROMIC SPIROOXAZINES, Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 297, 1997, pp. 305-312
Acidichromism of four photochromic spirooxazine compounds (SP) were in
vestigated systematically. When hydroxyl group is introduced on the na
phtho ring of spirooxazine, the spirooxazine compounds are found to ha
ve acidichromic properties in both acidic and basic solutions. Substit
uent effect on the absorption maximum of acidichromic products has bee
n discussed. A comprehensive discussion of acidichromic, photochromic
and thermochromic processes is included.