Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, Vol.344, 295-300, 2000
Synthesis and photochromic behaviors of novel bis-spiro-naphthooxazines connected through a phosphoryl group
A series of novel bis-spironaphthooxazines (3a similar to 3i) and (4) containing a phosphoryl group were synthesized in 70 similar to 91% yield. Their photochromic behaviors and photostabilty were investigated with the aid of absorption spectral measurements, showing that they exhibited higher fatigue resistance in the coloration and decoloration cycle than that of the parent reference compound 1.