ZfN: Search Results

1	Author	G. Abou-Elenien+, J. Rieser++, N. Ismail+++, K. Wallenfels	Requires cookie*
	Title	Elektrochemische Eigenschaften von Dihydropyridin-und Pyridinderivaten Electrochemical Properties of Pyridine and Dihydropyridine Derivatives
	Abstract	The electrochemical oxidation and reduction properties of different dihydropyridines and pyridines have been investigated in non aqueous solvent as benzonitrile and aceto-nitrile with tetra-n-butylammonium perchlorate as supporting electrolyte at platinium electrodes using DC-voltametry, cycl. voltametry and coulometry. Possible redox-mechanisms are discussed.
	Reference	Z. Naturforsch. 36b, 386—390 (1981); eingegangen am 26. November 1980
	Published	1981
	Keywords	Pyridines, Dihydropyridines, Electrochemical Behavior, Redox-Potentials
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	TEI-XML for	default:Reihe_B/36/ZNB-1981-36b-0386.pdf
	Identifier	ZNB-1981-36b-0386
	Volume	36

2	Author	Michael Neumann-Spallart, K. Kalyanasundaram	Requires cookie*
	Title	On the One and Two-Electron Oxidations of Water-Soluble Zinc Porphyrins in Aqueous Media
	Abstract	The one and two-electron oxidations of water soluble ionic zinc porphyrins (Zinctetra-methylpyridylporphyrin, ZnTMPyP, Zinc-tetra-p-sulfonato-phenyl-porphyrin, ZnTPPS, and Zinc-tetra-p-carboxy-phenylporphyrin, ZnTPPC) leading to the porphyrin /7-cations and /7-dications have been investigated in water by electrochemical (cyclic voltammetry and controlled potential electrolysis) and chemical methods. The half-wave potentials for the oxidation are shown to be markedly dependent on the charge on the /?-substituents. While the one-electron oxidations for all these porphyrins are reversible, the dication formation leads to labile isoporphyrins as intermediates.
	Reference	Z. Naturforsch. 36b, 596—600 (1981); received December 1 1980/February 19 1981
	Published	1981
	Keywords	Redox Potentials, yr-Cation Radicals, Electrochemistry
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	TEI-XML for	default:Reihe_B/36/ZNB-1981-36b-0596.pdf
	Identifier	ZNB-1981-36b-0596
	Volume	36