Journal ArticleDOI
Slow dynamics of constrained water in complex geometries
TLDR
In this article, the bimodal response of confined water is studied, with one bulk water-like subpicosecond component and a much slower component in a time scale of hundreds or thousands of picoseconds.Abstract:
Although water is often hailed as the lubricant of life, a detailed understanding of its role in many chemical and biological processes still eludes us. In many natural systems, water is confined in an environment where its free movement is restricted and its three-dimensional hydrogen-bonded network is disrupted. Very recently, several groups applied ultrafast laser spectroscopy to study the dynamics of the constrained water molecules. It is observed that the dynamic behavior of the confined water molecules is markedly different from that of the ordinary water molecules. The most striking result is the bimodal response of confined water, with one bulk water-like subpicosecond component and a much slower component in a time scale of hundreds or thousands of picoseconds. This slow second component constitutes 10−30% of the total response and is crucial in the understanding of the role of water in complex chemical and biological processes. The origin of the slow component has been a subject of intense recen...read more
Citations
More filters
Journal ArticleDOI
Biological water: femtosecond dynamics of macromolecular hydration
TL;DR: In this article, the authors review the issues guided by experimental studies, from this laboratory, of polar hydration dynamics at the surfaces of two proteins (Subtilisin Carlsberg (SC) and Monellin).
Journal ArticleDOI
Protein hydration dynamics in solution: a critical survey
TL;DR: In this paper, the authors examine central concepts in the description of protein hydration, and assess the experimental basis for the current view, with the focus on dynamic aspects, and show that the MRD-derived picture of a highly mobile hydration layer is consistent with recent molecular dynamics simulations, but is inconsistent with results deduced from intermolecular nuclear Overhauser effect spectroscopy, dielectric relaxation and fluorescence spectroscope.
Journal ArticleDOI
Solvation dynamics and proton transfer in supramolecular assemblies.
TL;DR: Water molecules confined in a supramolecular assembly control reactivity and dynamics of biological systems in a unique way and the ultraslow component of solvation markedly retards polar reactions.
Journal Article
Protein hydration dynamics in solution: a critical survey - Discussion
TL;DR: The aim here is to critically examine central concepts in the description of protein hydration, and to assess the experimental basis for the current view of protein Hydration, with the focus on dynamic aspects.
Journal ArticleDOI
Ionic liquids confined in porous matrices: Physicochemical properties and applications
TL;DR: In this article, a review of the science and technological applications of ionic liquids confined in nano-pores is presented and a comprehensive overview is given about the experimental studies dealing with the changes in the physico-chemical properties of ionics like thermal phase transition, stability, dynamical behavior, optical properties etc.
References
More filters
Journal ArticleDOI
A five-site model for liquid water and the reproduction of the density anomaly by rigid, nonpolarizable potential functions
TL;DR: In this paper, the authors used Monte Carlo statistical mechanics to reproduce the shape of the liquid density curve as a function of temperature and applied it to the NPT ensemble at 1 atm.
Book
Liposomes : a practical approach
TL;DR: Cossins liposomes in biological systems, R.R.C.Jones and A.J.Martin physical methods of study and new liposome characterization.
Journal ArticleDOI
Contemporary Issues in Electron Transfer Research
TL;DR: In this paper, a qualitative discussion of electron transfer, its time and distance scales, energy curves, and basic parabolic energy models are introduced to define the electron transfer process, and some of the important, challenging, and problematic issues in contemporary electron transfer research are discussed.
Journal ArticleDOI
Femtosecond solvation dynamics of water
TL;DR: In this paper, the authors present experimental measurements of the ultrafast solvation dynamics of a coumarin salt in water, and combine them with computer simulations to demonstrate that a solvent response on a timescale faster than 50 fs can dominate aqueous solvation dynamic.
Journal ArticleDOI
Liquid interfaces probed by second-harmonic and sum-frequency spectroscopy
TL;DR: Only liquid interfaces will be considered; gas/solid and solid/solid interfaces are not included; this restriction is necessary because of the enormous increase in SH and SF studies in recent years, which makes it extremely difficult to properly discuss the range of work being carried out around the world.