Light-sensitive 4-cyanocoumarin derivatives

摘要

4-Cyanocoumarin derivatives which have a distinct sensitivity to visible lights, distinct luminescent ability, and satisfactory applicability for photochemical polymerization, dye lasers, and organic electroluminescence. Since most of the derivatives have a fluorescent maximum at a wavelength of 600 to 650 nm, and particularly at a wavelength of 610 to 630 nm, they are extremely useful as luminescent agents for organic EL elements that emit visible lights in a red-color region.