Heptanuclear Mixed-Valence CoCo Molecular Wheel─A Molecular Analogue of Layered Double Hydroxides with Single-Molecule Magnet Behavior and Electrocatalytic Activity for Hydrogen Evolution Reactions.

We present a bifunctional heptanuclear cobalt(II)/cobalt(III) molecular complex formulated as [Co(μ-OH)(HL)(HL)](NO)·6HO () (where HL is 2,2'-(((1E,1'E)-((2-hydroxy-5-methyl-1,3-phenylene)bis(methanylylidene))bis(azanylylidene))bis(propane-1,3-diol)) and HL is 2-amino-1,3-propanediol). Compound has been characterized by single-crystal X-ray diffraction analysis along with other spectral and magnetic measurements. Structural analysis indicates that contains a mixed-valence Co cluster where a central Co(II) ion is connected to six different Co centers (four Co and two Co ions) by four μ-OH groups, giving rise to a planar heptanuclear cluster that resembles a molecular fragment of a layered double hydroxide (LDH).

A New Lysosome-Targetable Turn-On Fluorogenic Probe for Carbon Monoxide Imaging in Living Cells.

A lysosome-targetable fluorogenic probe, LysoFP-NO, was designed and synthesized based on a naphthalimide fluorophore that can detect selectively carbon monoxide (CO) in HEPES buffer (pH 7.4, 37 °C) through the transformation of the nitro group into an amino-functionalized system in the presence of CO. LysoFP-NO triggered a "turn-on" fluorescence response to CO with a simultaneous increase of fluorescence intensity by more than 75 times.