The controlled hydrolysis of sulfone-rhodamines affords a series of core-modified red-emitting rhodols, the fluorescence of which is sensitive to solvent polarity with pronounced bathochromic shifts recorded in both DMSO and CH3CN combined with an up to 8-fold increase in the fluorescence quantum yield.
K. V. Vygranenko, Y. M. Poronik, A. Wrzosek, A. Szewczyk and D. T. Gryko, Chem. Commun., 2021, 57, 7782 DOI: 10.1039/D1CC02687A
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