‘From the mole to the molecule’: ruthenium catalyzed nitroarene reduction studied with ‘bench’, high-throughput and single molecule fluorescence techniques
作者:Adela I. Carrillo、Kevin G. Stamplecoskie、M. Luisa Marin、Juan C. Scaiano
DOI:10.1039/c4cy00018h
日期:——
Single molecule fluorescence microscopy techniques are used to complement conventional catalysis and high-throughput experiments in order to gain a complete picture of a model reaction. In these experiments a model nitroarene is reduced to an amine where, upon reduction, a red shift in absorption/emission, as well as an increase in emission, is observed. The reaction is studied under bulk reaction conditions by NMR spectroscopy and the fluorescence activation makes it possible to also study this reaction at the single molecule level. Fluorescence correlation spectroscopy is a valuable technique in supporting the proposed reaction mechanism and understanding the nature and duration of molecular âvisitsâ to catalytic sites, where both the starting material, nitroarene, and the amine product have an affinity for the catalyst.
Selective turn-on fluorescent probes for imaging hydrogen sulfide in living cells
作者:Leticia A. Montoya、Michael D. Pluth
DOI:10.1039/c2cc30730h
日期:——
Hydrogen sulfide (H2S) is an important biological messenger but few biologically-compatible methods are available for its detection. Here we report two bright fluorescent probes that are selective for H2S over cysteine, glutathione and other reactive sulfur, nitrogen, and oxygen species. Both probes are demonstrated to detect H2S in live cells.