Synthesis of a New Photochromic Compound for Optical Storage
A new photochromic compound 1-[2,5-dimethyl-3-thienyl]-2-[2-methyl-5-pyridine-3-yl-3-thieyl] perfluoroyclopentene(1a) was synthesized, its photochromic properties were examined, the result indicated that the color of the compound 1a changed from colorless to a purple one upon irradiation with 297 nm UV light, a new absorption maxima were observed at 549 and 553 nm in hexane and PMMA film, respectively. The the photochromic reaction kinetics indicated that the cyclization processes of 1 belong to the zeroth order reaction and the cycloreversion process belong to the first order reaction.This new photochromic system also exhibited remarkable optical storage character.
Jingtao Han, Zhengyi Jiang and Sihai Jiao
S. Q. Cui et al., "Synthesis of a New Photochromic Compound for Optical Storage", Advanced Materials Research, Vols. 156-157, pp. 462-466, 2011