Αποτελέσματα Αναζήτησης
24 Αυγ 2024 · Instead of forming four hydrogen bonds, nanoconfined crystalline ice can form a quasi-one-dimensional hydrogen-bonded structure that exhibits only two hydrogen bonds per water molecule.
- Infrared spectroscopic study of hydrogen bonding topologies in the ...
Nature Communications - Spectroscopic studies of water...
- Infrared spectroscopic study of hydrogen bonding topologies in the ...
28 Οκτ 2020 · Nature Communications - Spectroscopic studies of water clusters provide insight into the hydrogen bond structure of water and ice. The authors measure infrared spectra of neutral water...
1 Δεκ 1996 · Abstract. The six-vertex lattice model is augmented with ionic vertices and bonding effects. These represent sources and sinks for hydrogen atoms, and the extra vertices account for the pH of water.
24 Οκτ 2024 · Furthermore, H-bonds between water molecules manifest themselves via a translational displacement, the H-bond stretch mode, which is a direct probe of H-bond strength. Because this vibrational mode occurs at a low frequency (~200 cm −1 ), close to the thermal energy (1 kT = 207 cm −1 at room temperature), it is difficult to detect.
14 Νοε 2014 · The frequency, and therefore the hydrogen-bond strength, appears to be a function of donor-acceptor interaction and of longer-range dipole-dipole alignment in the hydrogen-bonded network. The O-H dipole direction depends on the local environment and reflects intramolecular O-H stretch coupling.
This lecture focuses on the structural characteristics of hydrogen bonding in water and ice systems studied by neutron diffraction. Temperature variation and isotopic substitution measurements were made for water and ice in the bulk phase and also for water in confined geometry.
There is no question that the ubiquitous water molecule has an essential place in biological processes. From the hydrogen-bonding point of view, the water molecule is unique in having both double-donor and double-acceptor hydrogen-bond functionality, which is about one central atom, the oxygen.
