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Analyzing Melts and Fluids from Ab Initio Molecular Dynamics Simulations with the UMD Package
Published on: September 17, 2021
First-Principle Molecular Dynamics Investigation of Waterborne As-V Species
Sangkha Borah1, P Padma Kumar1
1Department of Physics , Indian Institute of Technology Guwahati , Guwahati , Assam 781039 , India.
Abstract:
The toxicity, mobility, and geochemical behaviors of arsenic are known to vary enormously with its speciation and oxidation states. The present work details results on the basis of ab initio molecular dynamics analysis of various waterborne As-V species, namely, H3AsO4, H2AsO4-, HAsO42-, and AsO43-. The nature of hydrogen bonding of these species with water and its influence on the solvent structure and relaxation behavior are discussed. Useful microscopic insights on the structural and spectroscopic signatures of the species in aqueous media are reported. Comparison of normal-mode frequencies of the species in gas phases to the vibrational density of states in solution provides insights on the influences of solvation and H bonding. The results are compared with the previous experimental and simulation studies, where available.
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