Therefore, an isostere carboxylic acids and heterocyclic ring compounds having the heterocyclic ring (eg, one or more) of a variety of atoms heterogeneous, diketo that they were N- linked, sulfonamides, ureas and to use a derivative thereof having a carbamate, novel compositions and methods are...
It can also occur at a molecular level, due to changes in the orientation of electrically polar molecules in response to an applied field, or through bending & stretching of the bonds between atoms within a molecule, very much like the material in a mechanical spring is bent or stretched. P...
Chris Woodford is the author and editor of dozens of science and technology books for adults and children, including DK's worldwide bestselling Cool Stuff series and Atoms Under the Floorboards, which won the American Institute of Physics Science Writing award in 2016. You can hire him to wri...
Graphene memory technology uses graphene -- a simple 2D material composed of carbon atoms -- to create memory devices such as graphene-based resistive RAM, or RRAM, graphene flash memory, and graphene-based HDDs. Neuromorphic memory. These devices mimic the behaviors of the human brain. They're...
Mechanically robust all-polymer solar cells from narrow band gap acceptors with hetero-bridging atoms. Joule 4, 658–672 (2020). Article CAS Google Scholar Sun, H. et al. High-performance n-type polymer semiconductors: applications, recent development, and challenges. Chem 6, 1310–1326 (...
Identify the central atom (or atoms) in the given compound. Write the formula of the compound formed between the Ga3+ and PO43- ions. Write the formula of the compound formed between the Zn2+ and PO43- ions. Write the formula of the compound formed between the ions Ca2+ and PO43-....
It contains an almost planar central Cu4C2IO ring with two-coordinate Cu atoms and two different sets of Cu—C distances (average Cu—C = 1.952 and 2.032 Å; average Cu—O = 1.859 Å; average Cu—I = 2.4478 Å)....
delocalized along the 3D rigid framework, showing 3D global antiaromaticity; and the hexacation possessesD3symmetry with 50 globally delocalized π-electrons, showing [6n + 2] 3D global aromaticity. Different types of aromaticity were therefore accessed in one molecular cage platform, depending...
B3LYP/LANL2DZ calculations of two series of isomeric dinuclear copper chelates based on the tridentate dibasic salicylaldimines from aromatic and heterocyclic amines were performed. According to calculations, the complexes with N,N-or S,S-donor atoms in the exchange fragment are mainly characterized...
These may be ionic bonds between the charged acidic or basic groups of side chains of amino acids, or hydrogen bonds whereby a hydrogen proton is shared between two atoms, or a weak force of binding termed van der Waals bonding that can occur between any two atoms that are very close in...