Roto-translational motion in liquid water and its structural implication
نویسندگان
چکیده
منابع مشابه
Roles of translational motion of water molecules in sustaining life.
By reviewing the results of our analyses based on statistical-mechanical theories, we point out that the entropic effect arising from the translational motion of water molecules is a principal driving force in a variety of self-assembling and ordering processes in biological systems such as protein folding, molecular recognition, and ordered aggregation of protein molecules. The great entropic ...
متن کاملReorientational motion and hydrogen-bond stretching dynamics in liquid water
The reorientational motion of the molecules in liquid water is investigated by measuring the anisotropy decay of the O±H stretching mode of HDO dissolved in D2O using femtosecond mid-infrared pump±probe spectroscopy. We observe that the anisotropy shows a non-exponential decay with an initial fast component of which the amplitude increases with increasing lengths of the O±H O hydrogen bond. The...
متن کاملStructural Changes of Lignin after Liquid Hot Water Pretreatment and Its Effect on the Enzymatic Hydrolysis
During liquid hot water (LHW) pretreatment, lignin is mostly retained in the pretreated biomass, and the changes in the chemical and structural characteristics of lignin should probably refer to re-/depolymerization, solubilization, or glass transition. The residual lignin could influence the effective enzymatic hydrolysis of cellulose. The pure lignin was used to evaluate the effect of LHW pro...
متن کاملTerahertz vibration–rotation–tunneling spectroscopy of water clusters in the translational band region of liquid water
We report the first direct observation of the hydrogen-bond stretching vibration for a water cluster. A perpendicular band of ~D2O!3 was measured by terahertz laser vibration–rotation–tunneling spectroscopy at 142.8 cm in the ‘‘translational band’’ region of the liquid corresponding to the hindered translational motions of water molecules. We have tentatively assigned the spectrum to transition...
متن کاملUnsolved mysteries of water in its liquid and glassy phases
Although H2O has been the focus of a considerable amount of research since the beginning of the century, its peculiar physical properties are still not well understood. First we discuss some of the anomalies of this ‘complex fluid’. Then we describe a qualitative interpretation in terms of percolation concepts. Finally, we discuss recent experiments and simulations relating to the liquid–liquid...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Chemical Physics Letters
سال: 1993
ISSN: 0009-2614
DOI: 10.1016/0009-2614(93)89362-l