Results 31 to 40 of about 75,155 (342)

Ab Initio Molecular Dynamics Study of Aqueous Solvation of Ethanol and Ethylene [PDF]

open access: yes, 2002
The structure and dynamics of aqueous solvation of ethanol and ethylene are studied by DFT-based Car-Parrinello molecular dynamics. We did not find an enhancement of the structure of the hydrogen bonded network of hydrating water molecules.
Meijer, Evert Jan, van Erp, Titus S.
core   +3 more sources

A Density Functional Theory Study of 4-OH Aldehydes

open access: yesChemistry Proceedings, 2023
According to certain theories, aldehydes play a significant role as precursor species in the creation of new atmospheric particles. In the current study, we first optimized the structure of the title compound by using the B3LYP 631-G (d, p) basic set ...
Huda Khanam, Ruchi Singh, Jyoti Pandey
doaj   +1 more source

Computational Study of the Structural, Electronic, and Thermodynamic Properties of the Eugenol in The Gas Phase and Solvated Environments

open access: yesCumhuriyet Science Journal
In this study, the structural and electronic properties of the eugenol molecule in the gas phase and in various solvent environments (n-octanol, acetone, ethanol, acetonitrile, DMF and water) were investigated theoretically.
Fatma Genç   +2 more
doaj   +1 more source

Infrared vibrational spectra of CH3+ and its deuterated isotopologues

open access: yesAIP Advances, 2019
We report a theoretical study of the infrared (IR) vibrational spectra of CH3+ and its deuterated isotopologues. We also report exothermicities for reactions of these species with HD and D2.
Gunnar Nyman, Hua-Gen Yu
doaj   +1 more source

Sildenafil–Resorcinol Cocrystal: XRPD Structure and DFT Calculations

open access: yesCrystals, 2020
Herein, the X-ray powder diffraction (XRPD) crystal structure of a new Sildenafil cocrystal is reported, where resorcinol has been used as the coformer.
Rafael Barbas   +4 more
doaj   +1 more source

Influence and Mechanism of Polar Solvents on the Retention Time of Short-Chain Fatty Acids in Gas Chromatography

open access: yesSeparations, 2022
Short-chain fatty acids (SCFAs), produced by microbes when dietary fiber ferments in the colon, are one of the most studied microbial products despite their volatility and complex matrices, which make analysis challenging. In the current study, we sought
Mu Ren, Narantsogt Natsagdorj, Na Shun
doaj   +1 more source

Excitons in hexagonal nanonetwork materials

open access: yes, 2004
Optical excitations in hexagonal nanonetwork materials, for example, Boron-Nitride (BN) sheets and nanotubes, are investigated theoretically. A permanent electric dipole moment, whose direction is from the B site to the N site, is considered along the BN
Harigaya, Kikuo
core   +1 more source

Understanding the Effect of Resistance Temperature Detector Temperature Controllers on Microstructural Alignment in Magnetic Freeze Casting

open access: yesAdvanced Engineering Materials, EarlyView.
The effect of temperature controllers that are commonly used in freeze‐casting is investigated in this work. Temperature controllers are observed to generate a voltage in the slurry. Microstructural alignment and ultimate compressive strength data show this voltage to interfere with the ability to align the microstructure using magnetic fields ...
Maddie A. Schmitz, Steven E. Naleway
wiley   +1 more source

A first principle DFT investigation on covalent functionalization of graphyne as a potential nanocarrier

open access: yesResults in Surfaces and Interfaces
In this investigation, Graphyne's efficiency as a nanocarrier is examined using calculations from first principle density functional theory. 2D Graphyne is a carbon allotrope made up of sp and sp2 bonded carbon atoms in a lattice.
M. Joshna Godlieb   +7 more
doaj   +1 more source

Hydration of ions in two dimensional water

open access: yes, 2015
We present a 2D lattice model of water to study the effects of ion hydration on the properties of water. We map the water molecules as lattice particles consisting of a single Oxygen at the center of a site and two Hydrogen atoms on each side.
Dutta, S., Jho, Y. S., Lee, Yongjin
core   +1 more source

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