Zurita, AdriánDuran Corbera, AnnaRibó i Trujillo, Josep M.El Hachemi, ZoubirCrusats i Aliguer, Joaquim2018-02-132018-02-132017-01-132046-2069https://hdl.handle.net/2445/119800The relationship between the acid-base chemistry and the supramolecular behavior of 5-(4-aminophenyl)-10,15,20-tris(4-sulfonatophenyl)porphyrin in acidic water is reported. A new species exhibiting a prominently red-shifted Q-absorption band at 742 nm is described which is in accordance with a hyperporphyrin-type spectrum of a J-aggregate in water. UV-vis spectroscopy and peak force microscopy reveal that depending on the pH value of the medium the porphyrin self-assembles into two structurally different mesophases which can be reversibly interconverted at will.5 p.application/pdfengcc-by (c) Zurita, Adrián et al., 2017http://creativecommons.org/licenses/by/3.0/esPorfirinesEspectroscòpiaPorphyrinsSpectrum analysisinfo:eu-repo/semantics/article6678142018-02-13info:eu-repo/semantics/openAccess