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Confined Water Molecules in Binary Mixtures of Water and 2,6-Lutidine Near Lower Solution Critical Temperature
[Image: see text] We study the concentration and temperature dependence of the reorientation dynamics of water molecules in binary mixtures of water and 2,6-lutidine below the lower solution critical temperature (LSCT) with femtosecond mid-infrared pump–probe spectroscopy. The measurements reveal th...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2020
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7816194/ https://www.ncbi.nlm.nih.gov/pubmed/33370126 http://dx.doi.org/10.1021/acs.jpcb.0c09363 |
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author | Korotkevich, Alexander A. Bakker, Huib J. |
author_facet | Korotkevich, Alexander A. Bakker, Huib J. |
author_sort | Korotkevich, Alexander A. |
collection | PubMed |
description | [Image: see text] We study the concentration and temperature dependence of the reorientation dynamics of water molecules in binary mixtures of water and 2,6-lutidine below the lower solution critical temperature (LSCT) with femtosecond mid-infrared pump–probe spectroscopy. The measurements reveal the presence of water molecules interacting with both the hydrophobic groups of lutidine and forming a hydrogen bond with the nitrogen atom of lutidine. Both types of molecules show a strongly decreased rotational mobility in comparison to bulk water. From the temperature dependence of the slow water fraction, we conclude that the lutidine molecules form clusters that decrease in size when the temperature is decreased further below the LSCT. |
format | Online Article Text |
id | pubmed-7816194 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-78161942021-01-21 Confined Water Molecules in Binary Mixtures of Water and 2,6-Lutidine Near Lower Solution Critical Temperature Korotkevich, Alexander A. Bakker, Huib J. J Phys Chem B [Image: see text] We study the concentration and temperature dependence of the reorientation dynamics of water molecules in binary mixtures of water and 2,6-lutidine below the lower solution critical temperature (LSCT) with femtosecond mid-infrared pump–probe spectroscopy. The measurements reveal the presence of water molecules interacting with both the hydrophobic groups of lutidine and forming a hydrogen bond with the nitrogen atom of lutidine. Both types of molecules show a strongly decreased rotational mobility in comparison to bulk water. From the temperature dependence of the slow water fraction, we conclude that the lutidine molecules form clusters that decrease in size when the temperature is decreased further below the LSCT. American Chemical Society 2020-12-28 2021-01-14 /pmc/articles/PMC7816194/ /pubmed/33370126 http://dx.doi.org/10.1021/acs.jpcb.0c09363 Text en © 2020 The Authors. Published by American Chemical Society This is an open access article published under a Creative Commons Non-Commercial No Derivative Works (CC-BY-NC-ND) Attribution License (http://pubs.acs.org/page/policy/authorchoice_ccbyncnd_termsofuse.html) , which permits copying and redistribution of the article, and creation of adaptations, all for non-commercial purposes. |
spellingShingle | Korotkevich, Alexander A. Bakker, Huib J. Confined Water Molecules in Binary Mixtures of Water and 2,6-Lutidine Near Lower Solution Critical Temperature |
title | Confined Water Molecules in Binary Mixtures of Water
and 2,6-Lutidine Near Lower Solution Critical Temperature |
title_full | Confined Water Molecules in Binary Mixtures of Water
and 2,6-Lutidine Near Lower Solution Critical Temperature |
title_fullStr | Confined Water Molecules in Binary Mixtures of Water
and 2,6-Lutidine Near Lower Solution Critical Temperature |
title_full_unstemmed | Confined Water Molecules in Binary Mixtures of Water
and 2,6-Lutidine Near Lower Solution Critical Temperature |
title_short | Confined Water Molecules in Binary Mixtures of Water
and 2,6-Lutidine Near Lower Solution Critical Temperature |
title_sort | confined water molecules in binary mixtures of water
and 2,6-lutidine near lower solution critical temperature |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7816194/ https://www.ncbi.nlm.nih.gov/pubmed/33370126 http://dx.doi.org/10.1021/acs.jpcb.0c09363 |
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