Berton, CesareBusiello, Daniel MariaZamuner, StefanoScopelliti, RosarioFadaei-Tirani, FarzanehSeverin, KayPezzato, Cristian2021-08-192021-08-192021-08-19202110.1002/anie.202109250https://infoscience.epfl.ch/handle/20.500.14299/180732A visible light-switchable buffer system based on a protonated merocyanine photoacid is presented. Para -substitution of the indolium side with a methoxy group affords a compound suitable for making hydrolytically stable aqueous buffers whose pH can be tuned between 7 and 4 using 500 nm light.text::journal::journal article::research article