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Coulomb repulsion between the bonding electron pair in the H-O covalent bond (denoted by "-") and the nonbonding electron pair of O (":") and the specific-heat disparity between the O:H and the H-O segments of the entire hydrogen bond…

Chemical Physics · Physics 2013-10-08 Chang Q. Sun

Recently, underscreening in concentrated electrolytes was discovered in experiments and confirmed in simulations and theory. It was found that the correlation length of the charge-charge correlations, $\lambda_s$, satisfies the scaling…

Statistical Mechanics · Physics 2022-11-07 A. Ciach , O. Patsahan

Hydrogen-bond forms a pair of asymmetric, coupled, H-bridged oscillators with ultra-short-range interactions and memory. hydrogen bond cooperative relaxation and the associated binding electron entrapment and nonbonding electron…

Soft Condensed Matter · Physics 2015-01-16 Chang Q Sun

We examined O:H-O bond relaxation under compression,heating,molecular undercoordination and claimed a universal resolution to the best-known mysteries of water ice such as ice foating, ice slipperiness, relegation and warm water cools…

Soft Condensed Matter · Physics 2018-09-06 Yongli Huang , Xi Zhang , Chang Q Sun

Water is the liquid of life, thanks to its three-dimensional adaptive hydrogen (H)-bond network. Confinement of this network may lead to dramatic structural changes that influence chemical and physical transformations. Although confinement…

Chemical Physics · Physics 2022-10-12 N. Dupertuis , O. B. Tarun , C. Lütgebaucks , S. Roke

A broad variety of liquids conform to density scaling: relaxation times expressed as a function of the ratio of temperature to density, the latter raised to a material constant {\gamma}. For atomic liquids interacting only through simple…

Soft Condensed Matter · Physics 2019-06-26 D. Fragiadakis , C. M. Roland

The scaling of the bond-bond correlation function $C(s)$ along linear polymer chains is investigated with respect to the curvilinear distance, $s$, along the flexible chain and the monomer density, $\rho$, via Monte Carlo and molecular…

Soft Condensed Matter · Physics 2009-11-10 J. P. Wittmer , H. Meyer , J. Baschnagel , A. Johner , S. Obukhov , L. Mattioni , M. Mueller , A. N. Semenov

The Bernal-Fowler ice rules stipulate that each water molecule in an ice crystal should form four hydrogen bonds. However, in extreme or constrained conditions, the arrangement of water molecules deviates from conventional ice rules,…

Statistical Mechanics · Physics 2024-07-12 Pavan Ravindra , Xavier R. Advincula , Christoph Schran , Angelos Michaelides , Venkat Kapil

Small molecules that interact strongly with water were the subject of this molecular dynamics (MD) study. These solutes include a cryoprotectant (DMSO), a polyalcohol [CH$_2$(OH)$_2$], carboxylic acid conjugates (HCOOH and HCOONa), an…

Chemical Physics · Physics 2025-08-06 Benjamin M. Harless , Jasmine K. Sindelar , J. Daniel Gezelter

We address a recent conjecture according to which the relaxation time $\tau$ of a viscous liquid obeys density scaling ($\tau=F(\rho^\gamma/T)$ where $\rho$ is density) if the liquid is ``strongly correlating,'' i.e., has almost 100%…

Soft Condensed Matter · Physics 2012-03-27 Thomas B. Schrøder , Ulf R. Pedersen , Jeppe C. Dyre

Monte Carlo computer simulations in the canonical and grand canonical statistical ensemble were used to explore the properties of the central force (CF1) water model. The intramolecular structure of the H$_2$O molecule is well reproduced by…

Soft Condensed Matter · Physics 2021-10-12 V. Ravnik , B. Hribar-Lee , O. Pizio , M. Luksic

We derive a low-scaling $G_0W_0$ algorithm for molecules, using pair atomic density fitting (PADF) and an imaginary time representation of the Green's function and describe its implementation in the Slater type orbital (STO) based Amsterdam…

Chemical Physics · Physics 2020-11-13 Arno Förster , Lucas Visscher

Water is detected in environments representing every stage of star and solar system formation, but its chemical evolution throughout these stages remains poorly constrained. Deuterium ratios offer a means of probing chemical links between…

We study the effect of salts on the thickness of wetting films on melting ice and interactions acting on CO$_2$ bubble near ice-water and vapor-water interfaces. Governing mechanisms are the Lifshitz and the double-layer interactions in the…

Soft Condensed Matter · Physics 2016-08-03 P. Thiyam , E. R. A. Lima , O. I. Malyi , D. F. Parsons , S. Y. Buhmann , C. Persson , M. Boström

Viscosities and their temperature, T, and volume, V, dependences are reported for 7 molecular liquids and polymers. In combination with literature viscosity data for 5 other liquids, we show that the superpositioning of relaxation times for…

Soft Condensed Matter · Physics 2009-11-11 CM Roland , S Bair , R Casalini

Skins of water and ice share the same attribute of supersolidity characterized by the identical H-O vibration frequency of 3450 cm-1. Molecular undercoordination and inter-electron-pair repulsion shortens the H-O bond and lengthen the O:H…

Chemical Physics · Physics 2014-09-26 Xi Zhang , Yongli Huang , Zengsheng Ma , Yichun Zhou , Weitao Zheng , Ji Zhou , Chang Q. Sun

Proton ordering in water ice is a paradigmatic order-disorder transition in a locally constrained system. The ice rules require exactly two hydrogens close to each oxygen, restricting the disorder to an exponentially large yet strongly…

Materials Science · Physics 2026-03-11 Qi Zhang , Sicong Wan , Lei Wang

Scaling law for geometrical and dynamical quantities of biological molecules is an interesting topic. According to Flory's theory, a power law between radius of gyration and the length of homopolymer chain is found, with exponent 3/5 for…

Biological Physics · Physics 2007-11-26 Liu Hong , Jinzhi Lei

The interplay between intra-molecular H-O covalent bond contraction, due to molecular under-coordination, and inter-molecular O:H expansion, due to inter-electron pair Coulomb repulsion, has been shown to be the source of the anomalous…

Chemical Physics · Physics 2013-10-08 Chang Q. Sun

Dielectric spectra (10^4-10^11 Hz) of water and ice at 0 {\deg}C are considered in terms of proton conductivity and compared to each other. In this picture, the Debye relaxations, centered at 1/{\tau}_W ~ 20 GHz (in water) and 1/{\tau}_I ~…

Soft Condensed Matter · Physics 2020-05-19 V. G. Artemov , A. A. Volkov
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