C hemistry is an ever expanding ‘‘universe’’ at the microscopic level requiring mastery of the invisible at ever increasing levels of complexity. Starting with atoms, assemblies of a single nucleus and orbiting electrons, the chemist has learned to understand atomic structure through mastery of the principles of electronic configurations. Proceeding to molecules, assemblies of two or more atoms...

Tin-oxo cage ions undergo Sn–C bond cleavage upon (V)UV excitation. Counterions influence further fragmentation, as they form covalent bonds to the cage.

Tetrathiafulvalene on Pt: The enhanced stability of redox active self-assembled monolayers Pt electrodes allows for sensitive electrochemical anion detection assisted by non-covalent halogen bond formation.

The efficient cyclic aminal formation leads to the stereoselective synthesis of corresponding [2+2] macrocycles, for which dynamic covalent nature bond can be controlled under specific conditions.

A nitrosyl ligand is bonded to a central metal mainly via mostly covalent normal bond and coordinative metal-to-NO π-backbond. recent analysis had unravelled similar bonding characteristics of both linear bent CoNO moieties in terms charge antibond occupation. Thus, there should be no justification for the usual assignment an NO+ MNO unit singlet-NO− one. This claim seems contradict that bendin...

Polymers bearing dynamic covalent bonds may exhibit dynamic properties, such as self-healing, shape memory and environmental adaptation. However, most dynamic covalent chemistries developed so far require either catalyst or change of environmental conditions to facilitate bond reversion and dynamic property change in bulk materials. Here we report the rational design of hindered urea bonds (ure...

In the chemotaxis of Escherichia coli, polar clustering of the chemoreceptors, the histidine kinase CheA, and the adaptor protein CheW is thought to be involved in signal amplification and adaptation. However, the mechanism that leads to the polar localization of the receptor is still largely unknown. In this study, we examined the effect of receptor covalent modification on the polar localizat...

The single-site Solvation, Bond Strength, and Electrostatic (SBE) model accounts for the anomalous position of silica onthe surface acidity versus aqueous acidity correlation developed for metal oxides, by considering the solvation energy change in the protonation reaction implemented through the dielectric constant (1/epsilon(k)) and the electrostatic energy change through the Pauling bond str...

While the covalent bond plays a central role in chemical predictions, interventions, and explanations, it is a difficult concept to define precisely. This paper investigates the structural conception of the covalent bond, which says that bonding is a directional, sub-molecular region of electron density located between individual atomic centers that is responsible for holding the atoms together...