biostudies-literatureYanshyna OEuropean Research CouncilMinerva Foundation3461-3464https://www.ebi.ac.uk/biostudies/studies/S-EPMC8908503biostudies-literatureUnknown58(21)We show that the optical properties of indigo carmine can be modulated by encapsulation within a coordination cage. Depending on the host/guest molar ratio, the cage can predominantly encapsulate either one or two dye molecules. The 1 : 1 complex is fluorescent, unique for an indigo dye in an aqueous solution. We have also found that binding two dye molecules stabilizes a previously unknown conformation of the cage.Chemical communications (Cambridge, England)Coexistence of 1 : 1 and 2 : 1 inclusion complexes of indigo carmine.PMC8908503820008Avram LKlajn RShimon LJWYanshyna OfalseCoexistence of 1 : 1 and 2 : 1 inclusion complexes of indigo carmine.We show that the optical properties of indigo carmine can be modulated by encapsulation within a coordination cage. Depending on the host/guest molar ratio, the cage can predominantly encapsulate either one or two dye molecules. The 1 : 1 complex is fluorescent, unique for an indigo dye in an aqueous solution. We have also found that binding two dye molecules stabilizes a previously unknown conformation of the cage.2022-01-01T00:00:00Z2022 Mar2025-04-04T23:35:03.082Z2025-04-04T23:35:03.082ZS-EPMC89085033506425810.1039/d1cc07081a