ABSTRACT
A lot of efforts were made in the last two decades to accumulate knowledge about the physical and chemical mechanisms which trigger color, color intensity or translucence as well as to develop materials with tuned adaptive optical properties. Materials with one specific chromogenic property, such as photochromism, thermochromism, electrochromism, mechanochromism or piezo-chromism, have come more and more into the focus of development of novel advanced materials. However, the development of real intrinsic chromogenic materials responding to two or even more external stimuli is not pronounced until now. The interdependency of, for example, thermochromism on one side and mechano-chromism, piezochromism, electrochromism or photochromism (apart from simple kinetic effect) as a further effect on the other side is currently not under discussion.
