Synthetic water-oxidation catalysts for artificial photosynthetic water oxidation

Article Abstract:

Manganese and other transition metal catalysts are discussed in terms of their role in the dioxygen-evolving step in water oxidation which involve the conversion of oxo bridges to dioxygen. It has been recognized that ruthenium catalysts are required for the generation of activated oxo groups. Terminal manganoyl(V)-oxo group, on the other hand, has been identified as the key precursor to dioxygen formation in porphyrin-based catalysts. It is proposed that O-O bonds are formed via solvent attack on terminal oxo groups or inter-/intra-molecular elimination of dioxygen from two such groups.

Manganese, Manganese (Metal), Water, Transition metals, Oxidation-reduction reaction, Oxidation-reduction reactions, Chemical reaction, Rate of, Chemical kinetics, Photosynthesis, Water analysis

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Thermodynamic and kinetic methods of analyses of protein-nucleic acid interactions. From simpler to more complex systems

Article Abstract:

Studies of ligand-macromolecule interactions, like protein-nucleic interactions, require detailed knowledge of the energetics and kinetics of the formed complexes. Thermodynamic analyses of spectroscopic approaches study protein-nucleic acid interactions including multiple-ligand binding phenomena and analyses of stopped-flow kinetic approaches provide the relaxation times and amplitudes characterizing the normal modes of the reaction.

Biological Product (except Diagnostic) Manufacturing, Drugs, Nucleic Acids, Proteins

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[alpha]-hydroxyallylation reaction of carbonyl compounds

Article Abstract:

The versatile approach to the alk-1-en-3,4-diol motif represented by the formal [alpha]-hydroxyallylation of carbonyl compounds by means of synthetic equivalents of the 1-hydroxyallyl anion is reviewed. Results reveal that the allylation reaction of carbonyl compounds by means of allylic organometallic compounds is regarded a variant of the aldol reaction.

Aldehydes, Carbonyl compounds, Structure

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