The properties of some hightech materials can be reversibly switched by irradiation with light. This is demonstrated in the video by an “intelligent” transparency, which contains a photoactice molecular switch. Its structure and properties are explained.

Video produced by Beilstein.TV in cooperation with the Wuppertaler Chemiedidaktik. Video licensed under the Creative Commons Licence 4.0 - By, No Derivatives (CC BY-ND 4.0).