Red-shifted fluorescent indicators for magnesium were developed by incorporation of sulfur or selenium in the azole moiety of ‘fura’ fluorophores. Single atom replacement in the acceptor of these ITC probes affords longer excitation and emission wavelengths as well as greater separation between excitation bands, valuable for ratiometric intracellular Mg2+ imaging.
M. S. Afzal, J. Pitteloud and D. Buccella, Chem. Commun., 2014, 50, 11358 DOI: 10.1039/C4CC04460F
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