Chem. Sci., 2026, Accepted Manuscript DOI: 10.1039/D6SC01535B, Edge Article Marko Heine Nowack, Gennaro Pescitelli, Arianna Lanza, Bo W. Laursen Highly stabilized tris(dialkylamino)-triazatriangulenium (A-TATA+) and tris(methoxy)-triazatriangulenium (MeO-TATA+) carbenium ions have been synthesized and characterized as fluorescent dyes. As a result of the extensive delocalization of positive charge in the planar...