Results 1 to 10 of about 75,155 (342)

Dipole Moment, Hydrogen Bonding and IR Spectrum of Confined Water [PDF]

open access: greenChemPhysChem, 2006
We report here DFT-based ab initio Molecular Dynamics results of water confined in a large pore LTA hydrophobic zeolite. We have studied the molecular dipole of confined water molecules, hydrogen bonding properties, and we have computed the system infrared spectrum.
Coudert, François-Xavier   +2 more
openaire   +5 more sources

The Dipole Moment Derivative of the Hydrogen Bond in Ice [PDF]

open access: bronzeCanadian Journal of Chemistry, 1972
The dipole moment derivative of the hydrogen bond in ice has been calculated assuming that the molecules can be represented as non-overlapping polarizable charge distributions characterized by dipole and quadrupole moments. The value is 0.1 electron charges which is about one third of the experimental value obtained from the far-infrared spectrum. The
E. Whalley
openaire   +2 more sources

Relationship between the Bond Dipole Moment and Bond Angle of Polar Molecules [PDF]

open access: bronzeActa Physico-Chimica Sinica, 2016
Jing-Si CAO, Mei-Ju WEI, Fei-Wu CHEN
openaire   +2 more sources

Screening and antiscreening in fullerene-like cages: Dipole-field amplification with ionic nanocages

open access: yesCarbon Trends, 2023
The successful synthesis of endohedral complexes consisting of nanoscale carbon cages that can encapsulate small molecules has been a remarkable accomplishment since these systems are ideal models to investigate how confinement effects can induce changes
Pier Luigi Silvestrelli   +3 more
doaj   +1 more source

Theoretical B3LYP study on Electronic Structure of Contrast Agent Iopamidol

open access: yesActa Chimica Slovenica, 2021
Nonionic low-osmolar contrast agents are thought about safe for intravenous or intra-arterial administration. Iopamidol is one of the contrast agents used for diagnostic clinical computed tomography (CT) protocols last four decades years.
Fatma Genç   +2 more
doaj   +1 more source

Physical Mechanism of One-Photon Absorption, Two-Photon Absorption, and Electron Circular Dichroism of 1,3,5 Triazine Derivatives Based on Molecular Planarity

open access: yesMolecules, 2023
We provide a method to regulate intramolecular charge transfer (ICT) through distorting fragment dipole moments based on molecular planarity and intuitively investigate the physical mechanisms of one-photon absorption (OPA), two-photon absorption (TPA ...
Xiangtao Chen   +9 more
doaj   +1 more source

Computational Study of Geometry, Solvation Free Energy, Dipole Moment, Polarizability, Hyperpolarizability and Molecular Properties of 2-Methylimidazole

open access: yesSultan Qaboos University Journal for Science, 2016
Ab initio calculations were carried out to study the geometry, solvation free energy, dipole moment, molecular electrostatic potential (MESP), Mulliken and Natural charge distribution, polarizability, hyperpolarizability, Natural Bond Orbital (NBO ...
Mohammad Firoz Khan   +3 more
doaj   +1 more source

“On-The-Fly” Calculation of the Vibrational Sum-Frequency Generation Spectrum at the Air-Water Interface

open access: yesMolecules, 2020
In the present work, we provide an electronic structure based method for the “on-the-fly” determination of vibrational sum frequency generation (v-SFG) spectra. The predictive power of this scheme is demonstrated at the air-water interface.
Deepak Ojha, Thomas D. Kühne
doaj   +1 more source

Ab initio calculation of the KRb dipole moments [PDF]

open access: yes, 2003
The relativistic configuration interaction valence bond method has been used to calculate permanent and transition electric dipole moments of the KRb heteronuclear molecule as a function of internuclear separation.
A. Derevianko   +23 more
core   +1 more source

QUANTUM MECHANICAL CALCULATIONS OF IR SPECTRA; REACTION ENERGIES OF C-O (R-O) THERMAL BOND RUPTURE FOR CEFUROXIME PRODRUGS [PDF]

open access: yesمجلة جامعة الانبار للعلوم الصرفة, 2013
PM3 calculations were carried out for the estimation vibration frequencies, IR absorption intensities, normal coordinates and some physical properties as heat of formation, dipole moment, and ΔEHOMO-LUMO ---etc.
REHAB MAJED KUBBA   +1 more
doaj   +1 more source

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