Heterogeneous catalyst reduces the cost of synthesis of cyclic polymers

Chemists from the USA, South Korea, Hungary and Switzerland have developed a heterogeneous ruthenium-based catalyst for the synthesis of cyclic polymers from cyclopentene. They also managed to come up with a reaction installation that makes it easy to separate the catalyst from the reaction products. The study was published in Nature Chemistry. Linear polymers containing… Continue reading Heterogeneous catalyst reduces the cost of synthesis of cyclic polymers

Coordination polymers caused water to absorb oxygen

Chemists from the USA have developed several microporous materials capable of forming stable colloidal solutions in water and in this form absorbing carbon dioxide and oxygen. To do this, the scientists used compounds with a hydrophilic outer surface and a hydrophobic pore surface. This made it possible to increase the ability of water to dissolve… Continue reading Coordination polymers caused water to absorb oxygen

Butyrate saved mice from peanut allergies

Butyrate, which is produced by the intestinal bacteria Clostridium, may help people with severe peanut allergies. This was discovered by scientists who introduced polymer micelles with butyrate into the intestines of mice and relieved them of allergies. The authors believe that such micelles can also help with reactions to other food proteins. A preprint of… Continue reading Butyrate saved mice from peanut allergies

The robotic arm was equipped with artificial muscles made from soft pneumatic actuators

Italian engineers have developed a soft pneumatic actuator that can be used as the basis for artificial muscles in robots. It is made from a polymer material using 3D printing and is a membrane with longitudinal folds. By pumping or pumping out air, it can be forced to compress or stretch in the longitudinal direction… Continue reading The robotic arm was equipped with artificial muscles made from soft pneumatic actuators

Chromatin in a living cell exhibited the properties of a liquid

French biophysicists have studied the movement of chromatin – a complex of DNA and proteins – inside a living cell using magnetic nanoparticles. As a result, it turned out that chromatin moves inside the nucleus not as a gel formed from a cross-linked polymer network, but as a viscous liquid. The study was published in… Continue reading Chromatin in a living cell exhibited the properties of a liquid

Chemists have obtained a monolayer of polymer fullerene

Chemists from China have synthesized a monolayer of polymer fullerene, a carbon modification consisting of closed carbon polyhedra. The monolayer turned out to be a stable crystalline semiconductor with anisotropic properties. The study was published in the journal Nature. Chemists study two-dimensional carbon materials because they often exhibit unusual electronic and optical properties. This occurs… Continue reading Chemists have obtained a monolayer of polymer fullerene

Diatoms helped fossilize spiders

Paleontologists have studied well-preserved spider fossils from a 22.5-million-year-old Oligocene site. It turned out that their tissues were able to fossilize thanks to diatoms. These single-celled organisms secreted sulfur-containing substances that reacted with the chitin of spiders, resulting in the formation of stable compounds. The study was published in the journal Communications Earth & Environment.… Continue reading Diatoms helped fossilize spiders

Physicists have noticed the influence of electrostatics on the sliding of drops

Physicists have studied the sliding of water droplets along inclined hydrophobic surfaces made of various materials. They experimentally and theoretically proved that the movement of droplets can be significantly influenced by the previously unaccounted for electrostatic interaction between charges in the droplet and the substrate. The study was published in Nature Physics. The movement of… Continue reading Physicists have noticed the influence of electrostatics on the sliding of drops

Chemists have found a convenient way to oxidize white phosphorus

Chemists from Germany have learned to easily convert white phosphorus into a convenient source for the synthesis of organophosphorus compounds. The reaction of phosphorus with an oxidizing agent and a base led to the formation of a salt, the cation of which contained one phosphorus atom. As chemists write in Nature Chemistryit was possible to… Continue reading Chemists have found a convenient way to oxidize white phosphorus

Membranes for gas separation have become more selective in a few months

Chemists from the USA and Saudi Arabia have synthesized several ladder polymers and prepared membranes from them for separating gases. It turned out that several of the resulting membranes, when aged for several months, become more selective and retain high permeability. In addition, they broke the selectivity record for some gas mixtures, the scientists write… Continue reading Membranes for gas separation have become more selective in a few months