Bernhard Kraeutler

Photoelectrosynthesis of ethane from acetate ion at an n-type titanium dioxide electrode. The photo-Kolbe reaction

The photoassisted oxidation of acetate ion to ethane in acetonitrile solutions at n-type TiO/sub 2/ electrodes in both the single-crystal and vapor deposited polycrystalline forms is reported. The quantum efficiency for acetate oxidation was approximately 65 percent at 0 v vs. Ag/0.1 M AgNO/sub 3/ for 0.08 M tetra-n-butylammonium acetate. (JSR)

PHOTOELECTROSYNTHESIS OF ETHANE FROM ACETATE ION AT AN N-TYPE TITANIUM DIOXIDE ELECTRODE. THE PHOTO-KOLBE REACTION

The photoassisted oxidation of acetate ion to ethane in acetonitrile solutions at n-type TiO/sub 2/ electrodes in both the single-crystal and vapor deposited polycrystalline forms is reported. The quantum efficiency for acetate oxidation was approximately 65 percent at 0 v vs. Ag/0.1 M AgNO/sub 3/ for 0.08 M tetra-n-butylammonium acetate. (JSR)

Magnetic isotope and magnetic field effects on chemical reactions. Sunlight and soap for the efficient separation of carbon-13 and carbon-12

Photolysis of dibenzyl ketone (DBK) solution at room temperature yields 1,2-diphenylethane and carbon monoxide quantitatively. Results of the study of this reaction, using light and ordinary mercury lamps as excitation sources, show that (1) a measurable, but small, /sup 12/C//sup 13/C isotope separation occurs in homogeneous (benzene) solution; (2) the efficiency of the separation is greatly enhanced in soap solution relative to homogeneous solution; (3) the carbonyl carbon of DBK is specifically and exponentially enriched as photolysis proceeds; (4) an external magnetic field significantly influences the efficiency of the isotopic separation. Mass spectroscopic and NMR analyses of the recovered DBK confirm these conclusions. 2 figures.