Fig. 3: Synthesis of photo-responsive azo-compound and their molecular and ionic transport studies.
From: Stimuli-responsive membranes—mechanisms, materials and future directions

A Synthesis of 1,3,5-triformylbenzene (Tb)–4,4′-diaminobenzanilide (Da) compound (TbDa) and TbDa-Azo compound. B Representation of the photo induced mass transport behavior. C Multistep manipulation of AI separation factor applying UV/Visible light. Adapted with permission from ref. 30. Permission to reprint granted.