A novel photochromic amorphous molecular material based on bisthienylethene with a Spiro-linker

A novel photochromic amorphous molecule (Spiro-BTE) based on bisthienylethe ne with a spirobifluorene linker has been synthesized. The relative high ph otochromic quantum yields were obtained for the Spiro-BTE and the switching stability was observed for more than 200 photochromic cycles. The introduc tion of the spiro, center for photochromic molecules provides a new guideli ne for the exploring new amorphous photochromic materials with high T-g, go od photostability.