Under certain low-temperature and high-pressure conditions, these two substances will form a solid, ice-like compound. Gas hydrates are crystalline compounds that result from the three-dimensional (3D) stacking of cages of hydrogen-bonded water molecules. Commonly, each cage can hold a single gas...
Within one molecule, coupling can occur between the stretch modes of the two O–H groups8, and strong intermolecular coupling of stretch modes makes its excitation quasi-instantaneously delocalized across several molecules in liquid water. The stretch modes are further coupled to the bending mode ...
During water/gas injection scenarios, asphaltene may accumulate at the liquid–liquid and solid–liquid interfaces and form microemulsions (due to interfacial tension (IFT) reduction)24and alter the wettability of solid surfaces, respectively. Yet, the mechanisms of these two phenomena through asphaltene...
Liquid water is an integral element of life, as it is the major component of every cell. Water acts as a passive but native matrix that solvates a myriad of biological molecules and ions and hosts an intricate network of communication among them. It is now clear that water also exhibits an...
thesolidstate is denser than the liquid state; thus, the solid would sink to the bottom of the liquid. The fact that ice floats on water is exceedingly important in the natural world, because the ice that forms on ponds and lakes in cold areas of the world acts as an insulating barrier...
Water is thus one of the very few substances whose solid form has a lower density than the liquid at the freezing point. Localized clusters of hydrogen bonds still remain, however; these are continually breaking and reforming as the thermal motions jiggle and shove the individual molecules. As ...
Molecular dynamics simulations were done for terminally alkyl and alkoxy substituted azobenzene liquid crystal (LC) molecules at an air-water interface using realistic (LC and water) molecular models. The simulation result were compared with those of a corresponding amphiphilic modification, i.e. ...
solubility at both high and low temperatures. Pressure rise causes compressibility in the gas phase, which leads to the release of more space for additional gas molecules to be dissolved in the water. In Fig.9a, the solubility at 278 K was higher than that of 304.19 K. Although, in high...
The existence of an ordered state of water molecules has been the subject of debate for decades1,2,3. In liquid water, ordering does not occur since the shorter-range H-bonds overwhelm the coupling of the dipoles and prevent the alignment of dipole moments. Even in the solid state, where...
The low concentrations of double-tail molecules and fatty acids in polyglycerol esters affect considerably their micellar, aggregation, and vesicle formations in aqueous solutions. The theoretical data interpretation of polyglycerol esters isotherms and thin liquid films data provide information on the adsorp...