Cargando…
Valence electronic structure of [EMIM][B(CN)(4)]: ion-pair vs. bulk description
The ultraviolet photoelectron spectrum of the [EMIM][B(CN)(4)] ionic liquid was recorded and analyzed. Together with different ab initio calculation methods, detailed insight into the electronic structure of this simple room temperature ionic liquid is possible. The ion-pair approximation to the liq...
Autores principales: | , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2019
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9073151/ https://www.ncbi.nlm.nih.gov/pubmed/35529163 http://dx.doi.org/10.1039/c9ra06762k |
_version_ | 1784701223786512384 |
---|---|
author | Kuusik, I. Berholts, M. Kruusma, J. Tõnisoo, A. Lust, E. Nõmmiste, E. Kisand, V. |
author_facet | Kuusik, I. Berholts, M. Kruusma, J. Tõnisoo, A. Lust, E. Nõmmiste, E. Kisand, V. |
author_sort | Kuusik, I. |
collection | PubMed |
description | The ultraviolet photoelectron spectrum of the [EMIM][B(CN)(4)] ionic liquid was recorded and analyzed. Together with different ab initio calculation methods, detailed insight into the electronic structure of this simple room temperature ionic liquid is possible. The ion-pair approximation to the liquid electronic structure was not sufficient. Therefore bulk ab initio calculations were performed on a proposed crystal structure. The modelling of bulk electronic spectra is able to explain the experimental electronic structure of the ionic liquid. Most notably, the dispersion corrected PBE calculation (PBE-D3BJ) showed good agreement with the experimental UPS spectrum. The spectra simulated by the B97-D and the BLYP-D3(BJ) functionals were also in agreement with the experimental data. The LDA approximation only provided qualitative agreement while the optB88-vdW and CX-vdW functionals were not good. However, it will be shown that many requirements have to be met in order to accurately describe the electronic structure of this ionic liquid. |
format | Online Article Text |
id | pubmed-9073151 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-90731512022-05-06 Valence electronic structure of [EMIM][B(CN)(4)]: ion-pair vs. bulk description Kuusik, I. Berholts, M. Kruusma, J. Tõnisoo, A. Lust, E. Nõmmiste, E. Kisand, V. RSC Adv Chemistry The ultraviolet photoelectron spectrum of the [EMIM][B(CN)(4)] ionic liquid was recorded and analyzed. Together with different ab initio calculation methods, detailed insight into the electronic structure of this simple room temperature ionic liquid is possible. The ion-pair approximation to the liquid electronic structure was not sufficient. Therefore bulk ab initio calculations were performed on a proposed crystal structure. The modelling of bulk electronic spectra is able to explain the experimental electronic structure of the ionic liquid. Most notably, the dispersion corrected PBE calculation (PBE-D3BJ) showed good agreement with the experimental UPS spectrum. The spectra simulated by the B97-D and the BLYP-D3(BJ) functionals were also in agreement with the experimental data. The LDA approximation only provided qualitative agreement while the optB88-vdW and CX-vdW functionals were not good. However, it will be shown that many requirements have to be met in order to accurately describe the electronic structure of this ionic liquid. The Royal Society of Chemistry 2019-10-16 /pmc/articles/PMC9073151/ /pubmed/35529163 http://dx.doi.org/10.1039/c9ra06762k Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/ |
spellingShingle | Chemistry Kuusik, I. Berholts, M. Kruusma, J. Tõnisoo, A. Lust, E. Nõmmiste, E. Kisand, V. Valence electronic structure of [EMIM][B(CN)(4)]: ion-pair vs. bulk description |
title | Valence electronic structure of [EMIM][B(CN)(4)]: ion-pair vs. bulk description |
title_full | Valence electronic structure of [EMIM][B(CN)(4)]: ion-pair vs. bulk description |
title_fullStr | Valence electronic structure of [EMIM][B(CN)(4)]: ion-pair vs. bulk description |
title_full_unstemmed | Valence electronic structure of [EMIM][B(CN)(4)]: ion-pair vs. bulk description |
title_short | Valence electronic structure of [EMIM][B(CN)(4)]: ion-pair vs. bulk description |
title_sort | valence electronic structure of [emim][b(cn)(4)]: ion-pair vs. bulk description |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9073151/ https://www.ncbi.nlm.nih.gov/pubmed/35529163 http://dx.doi.org/10.1039/c9ra06762k |
work_keys_str_mv | AT kuusiki valenceelectronicstructureofemimbcn4ionpairvsbulkdescription AT berholtsm valenceelectronicstructureofemimbcn4ionpairvsbulkdescription AT kruusmaj valenceelectronicstructureofemimbcn4ionpairvsbulkdescription AT tonisooa valenceelectronicstructureofemimbcn4ionpairvsbulkdescription AT luste valenceelectronicstructureofemimbcn4ionpairvsbulkdescription AT nommistee valenceelectronicstructureofemimbcn4ionpairvsbulkdescription AT kisandv valenceelectronicstructureofemimbcn4ionpairvsbulkdescription |