Highly conductive film has been obtained by oxidative polymerization of nickel(II) tetrakis(3-methoxy-4-hydroxyphenyl)porphyrin, Ni(II)TMHPP. This material was characterized by voltammetry, ac impedance, UV-visible spectroscopy, and x-ray photoelectron spectroscopy. The application of polymeric Ni(II)TMHPP as an anode for catalytic oxidation of water, methanol, and hydrazine in basic media is discussed.) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see ABSTRACTThe formation rate of surface states and its mechanism on a single-crystal rutile was investigated by photocapacitance transients which" Could be observed when the illuminating light was turned off after a long term illumination. By light illumination, the surface state was oxidized by a hole transfer from the valence band, resulting in band bending lowering. When the light was turned off, the surface state returned to the thermal equilibrium condition by an electron transfer from the conduction band and from the electroactive species in solution. As a result, the capacitance decreased exponentially

The acetyl and benzoyl radicals have been prepared by the reaction, RCOClSNa +ReO+NaCl, and trapped in a variety of matrices at 77 K using a rotating cryostat. Their e.s.r. spectra have been observed at 77 K and at temperatures up to 200 K. The principal values of the 9-tensor and carbon-13 hyperfine coupling tensors of the carbonyl carbon atom have been obtained for both radicals. The principal values of the proton and carbon-13 hyperfine coupling tensors have also been obtained for the methyl group in the acetyl radical. Analysis of the results shows that both radicals are a-type radicals with an LRCO angle of about 130". The unpaired electron is located primarily in a sp-hybrid orbital on the carbonyl carbon atom, but there is also an appreciable spin density on the adjacent atom of the substituent group 'R and on the oxygen atom. Comparison. of the present results with those published for the formyl radical and the a-radical, HOOCCH,CO, from malonic acid shows that the structures of the free radical centres are very similar for all four acyl radicals. The spin distribution in each radical is approximately

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