Adsorption of Phosphate Ions on the Basal and Edge Surfaces of Kaolinite in Low Salt Aqueous Solutions Using Molecular Dynamics Simulations

2021 ◽  
Vol 125 (38) ◽  
pp. 21179-21190
Author(s):  
Karien I. García ◽  
Gonzalo R. Quezada ◽  
José L. Arumí ◽  
Roberto Urrutia ◽  
Pedro G. Toledo
Keyword(s):  
Molecular Dynamics ◽  
Aqueous Solutions ◽  
Molecular Dynamics Simulations ◽  
Phosphate Ions ◽  
Low Salt ◽  
Dynamics Simulations

UNDERSTANDING DIFFERENT LCST LEVELS OF POLY(N-ALKYLACRYLAMIDE)S BY MOLECULAR DYNAMICS SIMULATIONS AND QUANTUM MECHANICS CALCULATIONS

2011 ◽  
Vol 10 (03) ◽  
pp. 359-370 ◽  
Author(s):  
JUAN PANG ◽  
HU YANG ◽  
JING MA ◽  
RONGSHI CHENG
Keyword(s):  
Molecular Dynamics ◽  
Quantum Mechanics ◽  
Aqueous Solutions ◽  
Molecular Dynamics Simulations ◽  
Steric Effect ◽  
Conformational Transition ◽  
Methyl Group ◽  
Branched Chain ◽  
Dynamics Simulations ◽  
Different Levels

Poly(N-alkylacrylamide) is a group of thermo-sensitive polymers that include poly (N-isopropylacrylamide), poly(N-n-propylacrylamide), poly(N-isopropylmethacryl-amide), and so on. The polymers exhibit different levels of lower critical solution temperatures (LCST) in aqueous solutions. In this article, their monomers and oligomers with 10 repeating units are selected, respectively, to demonstrate the cause of different LCST levels of the polymers in aqueous solutions using molecular dynamics simulations and quantum mechanics calculations. The monomers have functional groups of different steric volume that greatly affect the conformational transition of chains and LCST levels of the polymers. A branched chain of N-propyl group in N-isopropylacrylamide and an additional methyl group at α-carbon in N-isopropylmethacrylamide both increase the steric effect, making it more difficult for monomers to draw closer and resulting in higher LCST levels of the polymers. In addition, the simulated results from their corresponding oligomers exhibit the similar trend to those from the monomers.

scholarly journals Quantitative interpretation of molecular dynamics simulations for X-ray photoelectron spectroscopy of aqueous solutions

2016 ◽  
Vol 144 (15) ◽  
pp. 154704 ◽  
Author(s):  
Giorgia Olivieri ◽  
Krista M. Parry ◽  
Cedric J. Powell ◽  
Douglas J. Tobias ◽  
Matthew A. Brown
Keyword(s):  
Molecular Dynamics ◽  
Aqueous Solutions ◽  
Molecular Dynamics Simulations ◽  
Photoelectron Spectroscopy ◽  
Quantitative Interpretation ◽  
X Ray ◽  
Dynamics Simulations

Probing the Effect of Salt on Asphaltene Aggregation in Aqueous Solutions Using Molecular Dynamics Simulations

2018 ◽  
Vol 32 (8) ◽  
pp. 8090-8097 ◽  
Author(s):  
Xiaoyu Sun ◽  
Cuiying Jian ◽  
Yingkai He ◽  
Hongbo Zeng ◽  
Tian Tang
Keyword(s):  
Molecular Dynamics ◽  
Aqueous Solutions ◽  
Molecular Dynamics Simulations ◽  
Dynamics Simulations

scholarly journals Detection of Posner's clusters during calcium phosphate nucleation: a molecular dynamics study

2017 ◽  
Vol 5 (35) ◽  
pp. 7274-7284 ◽  
Author(s):  
Giulia Mancardi ◽  
Carlos Ernesto Hernandez Tamargo ◽  
Devis Di Tommaso ◽  
Nora H. de Leeuw
Keyword(s):  
Molecular Dynamics ◽  
Calcium Phosphate ◽  
Molecular Dynamics Simulations ◽  
Aggregation Process ◽  
Phosphate Ions ◽  
Dynamics Simulations

Molecular dynamics simulations of calcium and phosphate ions in water show that Posner-like clusters originate during the aggregation process.

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