Imaging of nitric oxide (NO) in living cells can provide new insights in understanding unsolved pathways in the cardiovascular and neurological dysfunction and many types of cancers. For the detection of NO under physiological conditions, we synthesized a turn-on fluorescent probe comprising CdSe/ZnS quantum dots (QDs) coordinated with dirhodium complex. Emission from CdSe/ZnS-QDs is quenched when coordinated with the dirhodium complex but can be restored upon the displacement by nitric oxide.
The N and S codoped GQDs can be used as a promising label free fluorescent probe for the sensitive and selective detection of Au3+ in aqueous media, which provides a new application of the functionalized GQDs to the detection of metal ions.
A rapid and facile route to access fluorescent manganese oxide quantum dots (MOQDs) has been developed at room temperature; the as-prepared MOQDs can serve as a fluorescent probe for the detection of metal ions in aqueous media.