Iron compounds in controlled radical polymerization: Ferrocenes, (clathro)chelates, and porphyrins

Model studies in cytochrome P-450-mediated toxicity of halogenated compounds: radical processes involving iron porphyrins.

Haloalkane toxicity originates from attack on biological targets by reactive intermediates derived from haloalkane metabolism by a hemoprotein, cytochrome P-450. Carbon-centered radicals and their peroxyl derivatives are most likely involved. The reactions of iron porphyrin--a model for cytochrome P-450--with various carbon-centered and peroxyl radicals generated by pulse radiolysis are examine...

Model compounds with superoxide dismutase activity: iron porphyrins and other iron complexes [proceedings].

The enzyme superoxide dismutase (EC 1.15.1.1) is essential to aerobic life (Fridovich, 1975; Halliwell, 1978). All superoxide dismutases are metalloproteins, containing manganese, iron or copper and zinc as the prosthetic groups. However, some simple metal complexes also react with the superoxide radical (02-'); for example, complexes of Cu(I1) with amino acids (Brigelius et al., 1974) and comp...

Block and Graft Copolymerization by Controlled/Living Radical Polymerization Methods

Compression, supramolecular organization and free radical polymerization of ethylene gas

At low pressure, ethylene gas consists of single translating and rotating molecules and behaves as an ideal gas. With decrease of free volume by compression, various rotating supramolecular particles are formed, which require less space for the movement: molecular pairs, bimolecules and oligomolecules. The appearance of a new kind of particles is manifested as a phase transition of the second o...

Effect of Small Reaction Locus in Free-Radical Polymerization: Conventional and Reversible-Deactivation Radical Polymerization "2279

Abstract: When the size of a polymerization locus is smaller than a few hundred nanometers, such as in miniemulsion polymerization, each locus may contain no more than one key-component molecule, and the concentration may become much larger than the corresponding bulk polymerization, leading to a significantly different rate of polymerization. By focusing attention on the component having the l...