Syntheses and Photostability of Unsymmetrical Squarylium Dyes for Organic Photoconductors(OPC)

유기광전도재료 (OPC)용 비대칭 Squarylium계 색소의 합성과 광안전성

A new photochromic spiroxazine dye having a pyridinium s-triazine moiety has been prepared. It shows a reversible photochemical color change from colorless to reddish-purple in ethanol solution. In ethanol solution the half life time of the open form was 150sec, which was shortened by raising temperature. Silica-immobilized spiroxazine(6). Fine power of silica-immobilized spiroxazine was changed intensely blue from colorless by U.V. light or sunlight.