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Hydroxyl Functionalized Pyridinium Ionic Liquids: Experimental and Theoretical Study on Physicochemical and Electrochemical Properties
Structurally modified hydroxyl functionalized pyridinium ionic liquids (ILs), liquid at room temperature, were synthesized and characterized. Alkylated N-(2-hydroxyethyl)-pyridinium ILs were prepared from alkylpyridines via corresponding bromide salts by N-alkylation (65–93%) and final anion exchang...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Frontiers Media S.A.
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6759651/ https://www.ncbi.nlm.nih.gov/pubmed/31620423 http://dx.doi.org/10.3389/fchem.2019.00625 |
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author | Lethesh, Kallidanthiyil Chellappan Evjen, Sigvart Raj, Jaganathan Joshua Roux, Denis C. D. Venkatraman, Vishwesh Jayasayee, Kaushik Fiksdahl, Anne |
author_facet | Lethesh, Kallidanthiyil Chellappan Evjen, Sigvart Raj, Jaganathan Joshua Roux, Denis C. D. Venkatraman, Vishwesh Jayasayee, Kaushik Fiksdahl, Anne |
author_sort | Lethesh, Kallidanthiyil Chellappan |
collection | PubMed |
description | Structurally modified hydroxyl functionalized pyridinium ionic liquids (ILs), liquid at room temperature, were synthesized and characterized. Alkylated N-(2-hydroxyethyl)-pyridinium ILs were prepared from alkylpyridines via corresponding bromide salts by N-alkylation (65–93%) and final anion exchange (75–96%). Pyridinium-alkylation strongly influenced the IL physicochemical and electrochemical properties. Experimental values for the ILs physicochemical properties (density, viscosity, conductivity, and thermal decomposition temperature), were in good agreement with corresponding predicted values obtained by theoretical calculations. The pyridinium ILs have electrochemical window of 3.0–5.4 V and were thermally stable up to 405°C. The IL viscosity and density were measured over a wide temperature range (25–80°C). Pyridine alkyl-substitution strongly affected the partial positive charge on the nitrogen atom of the pyridinium cations, as shown by charge distribution calculations. On-going studies on Mg complexes of the new ILs demonstrate promising properties for high current density electrodeposition of magnesium. |
format | Online Article Text |
id | pubmed-6759651 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-67596512019-10-16 Hydroxyl Functionalized Pyridinium Ionic Liquids: Experimental and Theoretical Study on Physicochemical and Electrochemical Properties Lethesh, Kallidanthiyil Chellappan Evjen, Sigvart Raj, Jaganathan Joshua Roux, Denis C. D. Venkatraman, Vishwesh Jayasayee, Kaushik Fiksdahl, Anne Front Chem Chemistry Structurally modified hydroxyl functionalized pyridinium ionic liquids (ILs), liquid at room temperature, were synthesized and characterized. Alkylated N-(2-hydroxyethyl)-pyridinium ILs were prepared from alkylpyridines via corresponding bromide salts by N-alkylation (65–93%) and final anion exchange (75–96%). Pyridinium-alkylation strongly influenced the IL physicochemical and electrochemical properties. Experimental values for the ILs physicochemical properties (density, viscosity, conductivity, and thermal decomposition temperature), were in good agreement with corresponding predicted values obtained by theoretical calculations. The pyridinium ILs have electrochemical window of 3.0–5.4 V and were thermally stable up to 405°C. The IL viscosity and density were measured over a wide temperature range (25–80°C). Pyridine alkyl-substitution strongly affected the partial positive charge on the nitrogen atom of the pyridinium cations, as shown by charge distribution calculations. On-going studies on Mg complexes of the new ILs demonstrate promising properties for high current density electrodeposition of magnesium. Frontiers Media S.A. 2019-09-18 /pmc/articles/PMC6759651/ /pubmed/31620423 http://dx.doi.org/10.3389/fchem.2019.00625 Text en Copyright © 2019 Lethesh, Evjen, Raj, Roux, Venkatraman, Jayasayee and Fiksdahl. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Chemistry Lethesh, Kallidanthiyil Chellappan Evjen, Sigvart Raj, Jaganathan Joshua Roux, Denis C. D. Venkatraman, Vishwesh Jayasayee, Kaushik Fiksdahl, Anne Hydroxyl Functionalized Pyridinium Ionic Liquids: Experimental and Theoretical Study on Physicochemical and Electrochemical Properties |
title | Hydroxyl Functionalized Pyridinium Ionic Liquids: Experimental and Theoretical Study on Physicochemical and Electrochemical Properties |
title_full | Hydroxyl Functionalized Pyridinium Ionic Liquids: Experimental and Theoretical Study on Physicochemical and Electrochemical Properties |
title_fullStr | Hydroxyl Functionalized Pyridinium Ionic Liquids: Experimental and Theoretical Study on Physicochemical and Electrochemical Properties |
title_full_unstemmed | Hydroxyl Functionalized Pyridinium Ionic Liquids: Experimental and Theoretical Study on Physicochemical and Electrochemical Properties |
title_short | Hydroxyl Functionalized Pyridinium Ionic Liquids: Experimental and Theoretical Study on Physicochemical and Electrochemical Properties |
title_sort | hydroxyl functionalized pyridinium ionic liquids: experimental and theoretical study on physicochemical and electrochemical properties |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6759651/ https://www.ncbi.nlm.nih.gov/pubmed/31620423 http://dx.doi.org/10.3389/fchem.2019.00625 |
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