Chemists have found ideal conditions for the hydrogen borrowing reaction

Chemists from Russia studied the hydrogen borrowing reaction necessary for the formation of carbon-nitrogen bonds. They found that it often does not require a catalyst at all, and also developed recommendations for successfully carrying out the reaction in the laboratory. The study was published in the journal Journal of Catalysis. Organic compounds containing an NH… Continue reading Chemists have found ideal conditions for the hydrogen borrowing reaction

Copper ions in tap water turned out to be a catalyst in the synthesis of naldemedine

Chemists from Japan were unable to repeat the laboratory synthesis of the drug naldemedine under production conditions. This happened because the tap water in the laboratory contained more copper salts, which could speed up one of the stages of the synthesis. But in the end, chemists managed to optimize the process by adding a copper… Continue reading Copper ions in tap water turned out to be a catalyst in the synthesis of naldemedine

Chemists turned ammonia into amino acids

Chinese chemists have proposed a method for synthesizing amino acids from ammonia. They carried out reactions between diazo compounds and ammonia in the presence of two catalysts – organic and organometallic. As a result, they were able to obtain enantiomers of amino acids in high yields. The study was published in Nature Catalysis. Ammonia is… Continue reading Chemists turned ammonia into amino acids

Conductive membrane helped reduce carbon dioxide losses during electrolysis

Chemists from the USA have found a way to reduce the loss of carbon dioxide during electrolytic reduction. They used a proton-conducting membrane so that carbonate anions did not have time to move into the anode space and mix with oxygen. As a result, carbon dioxide conversion increased, scientists write in Nature Catalysis. Carbon dioxide… Continue reading Conductive membrane helped reduce carbon dioxide losses during electrolysis

Fullerene increased the catalytic activity of copper in the hydrogenation reaction

Chemists from China were able to significantly increase the catalytic activity of copper in the reaction for producing ethylene glycol. They modified a copper catalyst with fullerene, which can accept and release electron density. Thanks to this, the stability and activity of the copper catalyst increased, scientists write in Science. The chemical industry produces 42… Continue reading Fullerene increased the catalytic activity of copper in the hydrogenation reaction

Chemists have obtained covalent organic nanotubes

Chemists from India and Italy produced covalent organic nanotubes using a reaction between an aromatic dialdehyde and a polycyclic molecule with four amino groups. Nanotubes turned out to be resistant to high temperatures and turned into rings under the influence of ultrasound, scientists write in Nature Chemistry. The most studied structures of all covalent organic… Continue reading Chemists have obtained covalent organic nanotubes

Chemists have obtained covalent organic frameworks with record pore sizes

Chemists from China have synthesized covalent organic frameworks with record pore sizes. They turned out to be stable crystalline substances capable of adsorbing large biomolecules, for example, the proteins myoglobin and pepsin. The study was published in Journal of the American Chemical Society. Covalent organic frameworks are two- and three-dimensional ordered porous structures built from… Continue reading Chemists have obtained covalent organic frameworks with record pore sizes

Molecular recognition accelerated by electrons

Chemists from Australia, China and the USA have learned to speed up molecular recognition reactions using electron donors. They managed to carry out an intermolecular process, kinetically forbidden under normal conditions, using cobaltocene as a catalyst. The study was published in the journal Nature. Molecular recognition is a special type of intermolecular reactions in which… Continue reading Molecular recognition accelerated by electrons

Mixed oxide of cobalt and manganese proved to be a stable catalyst for water electrolysis

Japanese chemists have found that spinel based on cobalt and manganese Co2MnO4 – an effective electrocatalyst for the release of oxygen from water. The mixed oxide of cobalt and manganese turned out to be resistant to the strongly acidic environment in which electrolysis is usually carried out, and in terms of efficiency it came close… Continue reading Mixed oxide of cobalt and manganese proved to be a stable catalyst for water electrolysis

“The Great Quest”

The question of the origin of life is still one of the eternal ones. However, people began to properly search for an answer only at the beginning of the 20th century, and already in the 21st century they set themselves the task of creating living cells artificially. In the book “The Great Quest. Geniuses and… Continue reading “The Great Quest”