ACIDICHROMIC EFFECTS IN 3-TRIMETHYLINDOLO-2,3'-NAPHTH[1,2-B]-1,4-OXAZINE), A PHOTOCHROMIC COMPOUND .1. ABSORPTION CHARACTERISTICS

Acidichromic and photochromic effects in alcoholic solutions of ,3-tri methylindolo-2,3'-naphth[1,2-b]-1,4-oxazine) are described. First-orde r, thermally-initiated decay kinetics associated with relaxation of th e merocyanine form under acidic conditions are reported. A model for a cidichromic and photochromic processes in these systems has been propo sed. Preliminary results indicate that spirooxazine compounds are pote ntially useful in device applications such as pH sensors.