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Band-Gap Energies of Choline Chloride and Triphenylmethylphosphoniumbromide-Based Systems
UV–VIS spectroscopy analysis of six mixtures containing choline chloride or triphenylmethylphosphonium bromide as the hydrogen bond acceptor (HBA) and different hydrogen bond donors (HBDs, nickel sulphate, imidazole, d-glucose, ethylene glycol, and glycerol) allowed to determine the indirect and dir...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7180541/ https://www.ncbi.nlm.nih.gov/pubmed/32218347 http://dx.doi.org/10.3390/molecules25071495 |
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author | Mannu, Alberto Di Pietro, Maria Enrica Mele, Andrea |
author_facet | Mannu, Alberto Di Pietro, Maria Enrica Mele, Andrea |
author_sort | Mannu, Alberto |
collection | PubMed |
description | UV–VIS spectroscopy analysis of six mixtures containing choline chloride or triphenylmethylphosphonium bromide as the hydrogen bond acceptor (HBA) and different hydrogen bond donors (HBDs, nickel sulphate, imidazole, d-glucose, ethylene glycol, and glycerol) allowed to determine the indirect and direct band-gap energies through the Tauc plot method. Band-gap energies were compared to those relative to known choline chloride-containing deep band-gap systems. The measurements reported here confirmed the tendency of alcohols or Lewis acids to increment band-gap energy when employed as HBDs. Indirect band-gap energy of 3.74 eV was obtained in the case of the triphenylmethylphosphonium bromide/ethylene glycol system, which represents the smallest transition energy ever reported to date for such kind of systems. |
format | Online Article Text |
id | pubmed-7180541 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-71805412020-05-01 Band-Gap Energies of Choline Chloride and Triphenylmethylphosphoniumbromide-Based Systems Mannu, Alberto Di Pietro, Maria Enrica Mele, Andrea Molecules Article UV–VIS spectroscopy analysis of six mixtures containing choline chloride or triphenylmethylphosphonium bromide as the hydrogen bond acceptor (HBA) and different hydrogen bond donors (HBDs, nickel sulphate, imidazole, d-glucose, ethylene glycol, and glycerol) allowed to determine the indirect and direct band-gap energies through the Tauc plot method. Band-gap energies were compared to those relative to known choline chloride-containing deep band-gap systems. The measurements reported here confirmed the tendency of alcohols or Lewis acids to increment band-gap energy when employed as HBDs. Indirect band-gap energy of 3.74 eV was obtained in the case of the triphenylmethylphosphonium bromide/ethylene glycol system, which represents the smallest transition energy ever reported to date for such kind of systems. MDPI 2020-03-25 /pmc/articles/PMC7180541/ /pubmed/32218347 http://dx.doi.org/10.3390/molecules25071495 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Mannu, Alberto Di Pietro, Maria Enrica Mele, Andrea Band-Gap Energies of Choline Chloride and Triphenylmethylphosphoniumbromide-Based Systems |
title | Band-Gap Energies of Choline Chloride and Triphenylmethylphosphoniumbromide-Based Systems |
title_full | Band-Gap Energies of Choline Chloride and Triphenylmethylphosphoniumbromide-Based Systems |
title_fullStr | Band-Gap Energies of Choline Chloride and Triphenylmethylphosphoniumbromide-Based Systems |
title_full_unstemmed | Band-Gap Energies of Choline Chloride and Triphenylmethylphosphoniumbromide-Based Systems |
title_short | Band-Gap Energies of Choline Chloride and Triphenylmethylphosphoniumbromide-Based Systems |
title_sort | band-gap energies of choline chloride and triphenylmethylphosphoniumbromide-based systems |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7180541/ https://www.ncbi.nlm.nih.gov/pubmed/32218347 http://dx.doi.org/10.3390/molecules25071495 |
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