Tag: SYNTHESIS

240 boron atoms in a single molecular species

The cuboctahedron consists of copper paddle-wheel nodes and carborane–isophthalic acids Scientists in the US have made a molecular species containing the highest number of boron atoms ever recorded in a crystallographically characterised molecular species. The unique supramolecular cuboctahedron contains 240 boron atoms and was synthesised by Chad Mirkin and colleagues at Northwestern University in Evanston, Illinois, via coordination-driven… Continue reading 240 boron atoms in a single molecular species

Magnetism of single molecule controlled by voltage

The molecule of about 2 nm in size is kept stable between two metal electrodes for several days. Image: Christian Grupe/KIT A team of physicists has succeeded in performing an extraordinary experiment: They demonstrated how magnetism that generally manifests itself by a force between two magnetized objects acts within a single molecule. This discovery is… Continue reading Magnetism of single molecule controlled by voltage

Synthesis of cyclic carbonates with carbon dioxide and cesium carbonate

  Cyclic carbonates are important compounds for the synthesis of biocompatible polymers and linear dialkyl carbonates, as well as solvents and electrolytes. We report here the synthesis of such compounds from easily accessible starting materials with carbon dioxide as a C1 source and caesium carbonate as the base. This new methodology is able to yield… Continue reading Synthesis of cyclic carbonates with carbon dioxide and cesium carbonate

Even bacteria use social networks

  This model shows the role of vesicles, vesicle chains and membrane tubes in M. xanthus biofilms. The scientists believe these connections help cells exchange signals and material. Image: Auer laboratory Using several imaging techniques, Lawrence Berkeley National Laboratory scientists found that a common soil bacterium stays connected by a network of chain-like membranes. They… Continue reading Even bacteria use social networks

History of Cyclotides

Cyclotides are head-to-tail cyclic peptides in plants Cyclotides are plant-derived peptides of approximately 30 amino acids. They have the characteristic structural features of a head-to-tail cyclized backbone and a cystine knot arrangement of their three conserved disulfide bonds. Their unique structural features lead to exceptional stability. This and their amenability to chemical synthesis have made… Continue reading History of Cyclotides

Chemists welcome newest member of nanocarbon family

The grossly warped nanographene has interesting optical and electronic properties © NPG A new family of nanocarbons has emerged with the growth of the first non-planar nanographene. Chemists from Boston College, US, and Nagoya University, Japan successfully synthesised a grossly warped nanographene by embedding non-hexagonal rings into a nanographene subunit. The unique structure was found… Continue reading Chemists welcome newest member of nanocarbon family

Marine Natural Products – Bioactivity & Chemical Ecology

Marine Natural Products – Bioactivity & Chemical Ecology allow slideshare to load……… Marine Natural Products – Bioactivity & Chemical Ecology [Kenneth Boyd, Martina Maria Burtscher & Robbie Mutton] from University of the Highlands and Islands

Crystal structure closes classic carbocation case

  Herb Brown favoured rapidly equilibrating classical enantiomers of the 2-norbornyl cation Winstein proposed the nonclassical structure of the 2-norbornyl cation, now shown to be correct F Scholz et al, Science, 2013, DOI: 10.1126/science.1238849 After more than 60 years, crystals of the 2-norbornyl cation have finally put its ‘nonclassical’ structure, with a pentacoordinate carbon, beyond… Continue reading Crystal structure closes classic carbocation case