Reassessing the Roles of Hydrogen Bonding and Proton Transfer in the Aqueous Electrochemistry of Quinones. CV Studies of 2-Anthraquinonesulfonate and 3-Phenanthrenequinonesulfonate in Unbuffered and Buffered Aqueous Solution

2006 ◽  
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Bonding ◽  
Proton Transfer ◽  
Aqueous Electrochemistry

scholarly journals Base-enhanced catalytic water oxidation by a carboxylate–bipyridine Ru(II) complex

2015 ◽  
Vol 112 (16) ◽  
pp. 4935-4940 ◽  
Author(s):  
Na Song ◽  
Javier J. Concepcion ◽  
Robert A. Binstead ◽  
Jennifer A. Rudd ◽  
Aaron K. Vannucci ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Proton Transfer ◽  
Water Oxidation ◽  
Proton Acceptor ◽  
Half Time ◽  
X Ray ◽  
X Ray Crystallography ◽  
Buffer Base ◽  
Electron Proton Transfer ◽  
C Nmr

In aqueous solution above pH 2.4 with 4% (vol/vol) CH3CN, the complex [RuII(bda)(isoq)2] (bda is 2,2′-bipyridine-6,6′-dicarboxylate; isoq is isoquinoline) exists as the open-arm chelate, [RuII(CO2-bpy-CO2−)(isoq)2(NCCH3)], as shown by 1H and 13C-NMR, X-ray crystallography, and pH titrations. Rates of water oxidation with the open-arm chelate are remarkably enhanced by added proton acceptor bases, as measured by cyclic voltammetry (CV). In 1.0 M PO43–, the calculated half-time for water oxidation is ∼7 μs. The key to the rate accelerations with added bases is direct involvement of the buffer base in either atom–proton transfer (APT) or concerted electron–proton transfer (EPT) pathways.

Application of MOSCED and UNIFAC to Screen Hydrophobic Solvents for Extraction of Hydrogen-Bonding Organics from Aqueous Solution

2007 ◽  
Vol 46 (13) ◽  
pp. 4621-4625 ◽  
Author(s):  
Timothy C. Frank ◽  
John J. Anderson ◽  
James D. Olson ◽  
Charles A. Eckert
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Bonding
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