The synthesis, characterization, and water oxidation activity of mononuclear ruthenium complexes with tris(2-pyridylmethyl)amine (TPA), tris(6-methyl-2-pyridylmethyl)amine (Me(3)TPA), and a new pentadentate ligand N,N-bis(2-pyridinylmethyl)-2,2'-bipyridine-6-methanamine (DPA-Bpy) have been described. The electrochemical properties of these mononuclear Ru complexes have been investigated by both experimental and computational methods. Using Ce(IV) as oxidant, stoichiometric oxidation of water by [Ru(TPA)(H(2)O)(2)](2+) was observed, while Ru(Me(3)TPA)(H(2)O)(2)](2+) has much less activity for water oxidation. Compared to [Ru(TPA)(H(2)O)(2)](2+) and [Ru(Me(3)TPA)(H(2)O)(2)](2+), [Ru(DPA-Bpy)(H(2)O)](2+) exhibited 20 times higher activity for water oxidation. This study demonstrates a new type of ligand scaffold to support water oxidation by mononuclear Ru complexes.

There continues to be a persistent, widespread gender gap in multiple STEM disciplines at all educational and professional levels: from the self-reported interest of pre-school aged students in scientific exploration, to the percentages of tenured faculty in these 10 disciplines, more men than women express an interest in science, a confidence in their scientific abilities, and ultimately more men than women decide to pursue scientific careers. Reported herein is an intensive outreach effort focused on addressing this

Herein we report a robust and easy method for detecting cesium metal ion (Cs + ) in partially aqueous solutions using the fluorescence quenching of 2,4-bis[4-(N,N-dihydroxyethylamino)phenyl]squaraine. This squaraine dye was found to be both highly sensitive (low limits of detection) and selective (limited response to other metals) for cesium ion detection. The detection is likely based on the metal complexing to the dihydroxyethanolamine moieties, which disrupts the donor-acceptor-donor architecture and leads to efficient quenching.

Reactions in the sun: A simple homogeneous photocatalytic system for the oxidation of organic substrates that consists of RuII‐H2O complex as catalyst, [Ru(bpy)3]2+ as photosensitizer, and [Co(NH3)5Cl]2+ as electron acceptor, can efficiently and selectively catalyze the oxidation of alkene and alcohols in water by using sunlight as the driving force (see scheme).

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