Compounds of the general formula (I) and compounds of the general formula (II), use of compounds (I) or (II) as visible or invisible marking materials, for coloring of materials, in laser welding of materials, for identification of bases, acids or pH changes, as dispersion agents, pigment additives for organic pigments and intermediate products for the manufacture of pigment additives, in thermal management or energy management, in the photovoltaic or optical data storage.