Results 171 to 180 of about 11,307 (224)

Supramolecular Chemistry of Metalloporphyrins

Chemical Reviews, 2009
Irina Beletskaya, Vladimir S Tyurin, Roger Guilard   +2 more
exaly   +4 more sources

Metalloporphyrin phototoxicity

Journal of Photochemistry and Photobiology B: Biology, 1990
The phototoxicities of six metalloporphyrin dimethylesters (i.e. cobalt (Co), copper (Cu), manganese (Mn), nickel (Ni), tin (Sn) and zinc (Zn) were investigated. Hemolysis of human erythrocytes and inactivation of two enzymes (acetylcholinesterase and beta-galactosidase) were used to assess the phototoxic efficacy of these metal chelates.
J, Scott, J M, Quirke, H J, Vreman, D K, Stevenson, K R, Downum   +4 more
openaire   +2 more sources

Metalloporphyrin chelatase from barley

Biochimica et Biophysica Acta (BBA) - Enzymology, 1969
1. 1. A soluble enzyme which catalyzes the insertion of both zinc and iron into porphyrins has been prepared from etiolated barley seedlings. Purification of about 30-fold has been achieved by (NH4)2SO4 fractionation and chromatography on Sephadex G-150.
B R, Goldin, H N, Little
openaire   +2 more sources

Halogenation of metalloporphyrins

Russian Journal of Bioorganic Chemistry, 2000
We found that thionyl chloride can chlorinate porphyrin complexes with transient metals (Pd, Ni, or Cu) at the free β andmeso-positions of the porphyrin macrocycle. A more prolonged or rigorous treatment also causes the chlorination of side alkyl substituents, mainly, methyl groups.
V. D. Rumyantseva, E. A. Aksenova, O. N. Ponamoreva, A. F. Mironov   +3 more
openaire   +1 more source

Spectroelectrochemistry of metalloporphyrins

Pure and Applied Chemistry, 1990
Abstract
K. M. Kadish, X. Mu
openaire   +1 more source

Hydrogen Generation by Hangman Metalloporphyrins

Journal of the American Chemical Society, 2011
A cobalt(II) hangman porphyrin with a xanthene backbone and a carboxylic acid hanging group catalyzes the electrochemical production of hydrogen from benzoic and tosic acid in acetonitrile solutions. We show that Co(II)H is exclusively involved in the generation of H(2) from weak acids.
Chang Hoon, Lee, Dilek K, Dogutan, Daniel G, Nocera   +2 more
openaire   +2 more sources

Electrocatalysis of metalloporphyrins

Journal of Electroanalytical Chemistry and Interfacial Electrochemistry, 1990
Abstract The electrocatalytic reduction of cystine with water-soluble cobalt(II) tetrakis(4-trimethylammoniumphenyl)porphyrin (CoTTAPP) and cobalt(II) tetrakis(4-sulphophenyl)porphyrin (CoTSPP) in 0.2 M H 2 SO 4 solution was investigated. The experimental results of cyclic voltammetry and the rotating disc electrode technique indicated that both ...
Dai-Wen Pang, Zong-Li Wang
openaire   +1 more source

Niedrigschmelzende, flüssigkristalline Metalloporphyrine

Angewandte Chemie, 1997
Gezielt einstellen läßt sich die Art der Mesophase durch die Wahl der Seitenketten von Porphyrinen mit vielen langen Seitenketten. Es entstehen calamitische oder columnare Phasen, deren Übergangstemperaturen niedriger sind als die der seitenkettenfreien Stammverbindungen.
Qing Min Wang, Duncan W. Bruce
openaire   +1 more source

Metalloporphyrin Molecular Sieves

Chemistry – A European Journal, 2000
Crystal-engineering strategies have been systematically developed for the rational design by self-assembly of diverse metalloporphyrin molecular-sieve materials. Cooperative coordination and hydrogen bonding algorithms of molecular recognition proved particularly useful for this aim.
openaire   +2 more sources