Optical properties of 2,2’-dihydroxy-1,1’-naphtalazine

Abstract

Luminescent pigments are able to absorb the energy of natural or artificial light sources and release it in the form of a visible glow in the dark. By chemical nature, phosphors are divided into inorganic and organic. Unlike inorganic luminophors, which glow only in the solid state, organic luminophors, in most cases, luminesce in various aggregate states. This difference is due to the fact that the glow is associated with a certain structure of the crystal lattice, which includes activating additives.

After the destruction of the crystal lattice, luminescence disappears. In the case of organic luminophors, individual molecules luminesce. It is well known that the quantum yield of fluorescence of organic chromophores usually decreases in the solid state, although they have a high quantum yield of luminescence in solution.