The manganese-enzyme-substrate complexes of a number of nucleoside diphosphate substrates of creatine kinase showed a range of enhanced values of the longitudinal proton relaxation rate of water with respect to the manganous aquocation, although the small enhancement factors, ca, of all the binary manganese-nucleotide complexes were the same, approximately 1.6. The order of the values of t, the...

In recent years the technique of Nuclear Mag­ netic Resonance (NMR) has been successfully ap­ plied to heavier metals such as molybdenum [1 ], manganese [2] or vanadium [3]. Although this method is restricted to diamagnetic compounds, sufficient structural information can be obtained as demonstrated for the series of thiomolybdates Mo0 4 -nSn2(n = 0 — 4) (Ref. [1. 4]). This is espe­ cially true...

The carcinogenic properties of selected metals and their compounds are reviewed to provide a useful reference for existing knowledge on relationships between physical and chemical forms, kinetics and carcinogenic potential and between epidemiology, bioassays, and short-term tests. Extensive consideration is given to arsenic, beryllium, cadmium, chromium, lead, and nickel. Other metals such as a...

Alkane functionalization using safe and low-energy processes is of great interest to industry academia. Aiming contribute the process saturated hydrocarbon functionalization, we have studied a set three manganese(III) complexes as catalysts for promoting oxidation hydrocarbons (cyclohexane methylcyclohexane) in presence hydrogen peroxide or trichloroisocyanuric acid (TCCA). The mononuclear comp...

Synthesis of new efficient catalysts inspired by Nature is a key goal in the production of clean fuel. Different compounds based on manganese oxide have been investigated in order to find their water-oxidation activity. Herein, we introduce a novel engineered polypeptide containing tyrosine around nano-sized manganese-calcium oxide, which was shown to be a highly active catalyst toward water ox...

Despite the growing importance of fluorinated organic compounds in drug development, there are no direct protocols for the fluorination of aliphatic C-H bonds using conveniently handled fluoride salts. We have discovered that a manganese porphyrin complex catalyzes alkyl fluorination by fluoride ion under mild conditions in conjunction with stoichiometric oxidation by iodosylbenzene. Simple alk...

Cubic strontium manganese oxide is an end-member of the colossal magnetoresistive (CMR) family of manganese-based perovskites, Ln1-xAExMnO3. Because normal synthesis conditions lead to the 4-H hexagonal polymorph, high-pressure conditions are typically used to obtain the cubic perovskite polymorph. In this work, we describe the synthesis and structural/physical characterization of the cubic per...