Abstract
A new phthalazine based chemosensor 3 was developed for the highly selective and sensitive detection of Co2+ in the mixed solvent system, CH3CN-H2O (1 : 1, v/v). In the presence of Co2+, the colour of the solution 3 changed from yellow to green; the absorption maxima of 3 was red-shifted from 383 nm to 435 nm, and the fluorescence of 3 at 550 nm was significantly enhanced. The sensor 3 showed a detection limit down to 25 nM by forming a complex species with Co2+ in 1 : 1 stoichiometry. Furthermore, by means of confocal laser scanning microscopy experiments, it has demonstrated that it can be used as a fluorescent probe for monitoring Co2+ in living cells.
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Patil, S., Patil, R., Fegade, U. et al. A novel phthalazine based highly selective chromogenic and fluorogenic chemosensor for Co2+ in semi-aqueous medium: application in cancer cell imaging. Photochem Photobiol Sci 14, 439–443 (2015). https://doi.org/10.1039/c4pp00358f
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DOI: https://doi.org/10.1039/c4pp00358f