Electrocatalytic reduction of protons to hydrogen by a water-compatible cobalt polypyridyl platform

Julian P. Bigi, Tamara E. Hanna, W. Hill Harman, Alicia Chang, Christopher J. Chang
2010 Chemical Communications  
General Synthetic Methods. Unless noted otherwise, all manipulations were carried out at room temperature under a dinitrogen atmosphere in a VAC glovebox or using highvacuum Schlenk techniques. Methylene chloride, diethyl ether, tetrahydrofuran, and pentane were dried over activated 4 Å molecular sieves, passed through a column of activated alumina, and sparged with nitrogen prior to use. Acetonitrile, acetonitrile-d 3 , propionitrile and butyronitrile were refluxed over CaH 2 , distilled, and
more » ... 2 , distilled, and sparged with nitrogen. All other reagents and solvents were purchased from commercial sources and used without further purification. Physical Methods. NMR spectra were recorded on Bruker spectrometers operating at 300 or 400 MHz as noted. Chemical shifts are reported in ppm relative to residual protiated solvent; coupling constants are reported in Hz. Magnetic susceptibility measurements were made using Evans' method: an NMR tube containing the paramagnetic compound in CD 3 CN was fitted with an insert containing only CD 3 CN. The paramagnetic shift of the CHD 2 CN signal was used to calculate the room temperature solution magnetic moment.T 1 Mass spectra were determined at the
doi:10.1039/b915846d pmid:20107663 fatcat:56v4xzjnobbkpg5shy2vu3eycy