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Dihydrogen Binding Affinity of Polyatomic Anions: A DFT Study
[Image: see text] The dihydrogen-binding ability of polyatomic oxohalo anions ClO(–), ClO(2)(–), ClO(3)(–), ClO(4)(–), BrO(–), BrO(2)(–), BrO(3)(–), and BrO(4)(–) has been studied at the M06L/6-311++G(d,p) density functional theory and the CCSD(T)/aug-cc-pVTZ//CCSD/aug-cc-pVDZ ab initio theory. The...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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American Chemical Society
2017
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6641918/ https://www.ncbi.nlm.nih.gov/pubmed/31457743 http://dx.doi.org/10.1021/acsomega.7b00664 |
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author | Della, Therese Davis Suresh, Cherumuttathu H. |
author_facet | Della, Therese Davis Suresh, Cherumuttathu H. |
author_sort | Della, Therese Davis |
collection | PubMed |
description | [Image: see text] The dihydrogen-binding ability of polyatomic oxohalo anions ClO(–), ClO(2)(–), ClO(3)(–), ClO(4)(–), BrO(–), BrO(2)(–), BrO(3)(–), and BrO(4)(–) has been studied at the M06L/6-311++G(d,p) density functional theory and the CCSD(T)/aug-cc-pVTZ//CCSD/aug-cc-pVDZ ab initio theory. The maximum number of dihydrogen adsorbed by the anions (n(max)) varies from 17 to 24 in the first coordination shell. As the number of H(2) adsorbed varies from 1 to n(max), the oxochloro and oxobromo anions show a wide range for interaction energy (E(int)), namely, 1.5–45.4 kcal/mol for the former and 1.4–46.0 kcal/mol for the latter. These results indicate that both series of anions show very similar and high affinity to bind with several dihydrogen molecules. Further, an increase in the coordination ability and a decrease in the strength of the dihydrogen interaction are observed with an increase in the number of oxygen atoms in the polyatomic anion. In contrast, the neutral oxohaloacids show negligible interaction with dihydrogen. The anion···H(2) noncovalent interactions along with H···H dihydrogen interactions within the complex are ascertained by locating the bond critical points (bcps) in the quantum theory of atoms in molecules analysis. The electron density at the bcp summed up for all of the anion···H(2) interactions (∑ρ(bcp)) showed a strong linear relationship with E(int), indicating that the stability of the complex is due to the formation of a large network of noncovalent bonds in the complex. The amount of electron density donated by the anion to the dihydrogen during complex formation is also gauged from the molecular electrostatic potential values at the nuclei (V(n)) of all of the atoms in the anion. The hydrogen uptake leads to a significant reduction in the negative character of V(n), and the total change in V(n) from all of the anion atoms (∑ΔV(n)) is found to be directly proportional to E(int). The polyatomic anions have a very high affinity toward dihydrogen binding, which can be utilized for the development of new hydrogen storage systems. |
format | Online Article Text |
id | pubmed-6641918 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-66419182019-08-27 Dihydrogen Binding Affinity of Polyatomic Anions: A DFT Study Della, Therese Davis Suresh, Cherumuttathu H. ACS Omega [Image: see text] The dihydrogen-binding ability of polyatomic oxohalo anions ClO(–), ClO(2)(–), ClO(3)(–), ClO(4)(–), BrO(–), BrO(2)(–), BrO(3)(–), and BrO(4)(–) has been studied at the M06L/6-311++G(d,p) density functional theory and the CCSD(T)/aug-cc-pVTZ//CCSD/aug-cc-pVDZ ab initio theory. The maximum number of dihydrogen adsorbed by the anions (n(max)) varies from 17 to 24 in the first coordination shell. As the number of H(2) adsorbed varies from 1 to n(max), the oxochloro and oxobromo anions show a wide range for interaction energy (E(int)), namely, 1.5–45.4 kcal/mol for the former and 1.4–46.0 kcal/mol for the latter. These results indicate that both series of anions show very similar and high affinity to bind with several dihydrogen molecules. Further, an increase in the coordination ability and a decrease in the strength of the dihydrogen interaction are observed with an increase in the number of oxygen atoms in the polyatomic anion. In contrast, the neutral oxohaloacids show negligible interaction with dihydrogen. The anion···H(2) noncovalent interactions along with H···H dihydrogen interactions within the complex are ascertained by locating the bond critical points (bcps) in the quantum theory of atoms in molecules analysis. The electron density at the bcp summed up for all of the anion···H(2) interactions (∑ρ(bcp)) showed a strong linear relationship with E(int), indicating that the stability of the complex is due to the formation of a large network of noncovalent bonds in the complex. The amount of electron density donated by the anion to the dihydrogen during complex formation is also gauged from the molecular electrostatic potential values at the nuclei (V(n)) of all of the atoms in the anion. The hydrogen uptake leads to a significant reduction in the negative character of V(n), and the total change in V(n) from all of the anion atoms (∑ΔV(n)) is found to be directly proportional to E(int). The polyatomic anions have a very high affinity toward dihydrogen binding, which can be utilized for the development of new hydrogen storage systems. American Chemical Society 2017-08-15 /pmc/articles/PMC6641918/ /pubmed/31457743 http://dx.doi.org/10.1021/acsomega.7b00664 Text en Copyright © 2017 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes. |
spellingShingle | Della, Therese Davis Suresh, Cherumuttathu H. Dihydrogen Binding Affinity of Polyatomic Anions: A DFT Study |
title | Dihydrogen Binding Affinity of Polyatomic Anions:
A DFT Study |
title_full | Dihydrogen Binding Affinity of Polyatomic Anions:
A DFT Study |
title_fullStr | Dihydrogen Binding Affinity of Polyatomic Anions:
A DFT Study |
title_full_unstemmed | Dihydrogen Binding Affinity of Polyatomic Anions:
A DFT Study |
title_short | Dihydrogen Binding Affinity of Polyatomic Anions:
A DFT Study |
title_sort | dihydrogen binding affinity of polyatomic anions:
a dft study |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6641918/ https://www.ncbi.nlm.nih.gov/pubmed/31457743 http://dx.doi.org/10.1021/acsomega.7b00664 |
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