Hydrogen bonding to oxygen in siloxane bonds drives liquid phase adsorption of primary alcohols in high-silica zeolites

Upon liquid phase adsorption of C(1)–C(5) primary alcohols on high silica MFI zeolites (Si/Al = 11.5–140), the concentration of adsorbed molecules largely exceeds the concentration of traditional adsorption sites: Brønsted acid and defect sites. Combining quantitative in situ(1)H MAS NMR, qualitativ...

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Autores principales: Radhakrishnan, Sambhu, Lejaegere, Charlotte, Duerinckx, Karel, Lo, Wei-Shang, Morais, Alysson F., Dom, Dirk, Chandran, C. Vinod, Hermans, Ive, Martens, Johan A., Breynaert, Eric
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2023
Materias:
Chemistry
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10463557/
https://www.ncbi.nlm.nih.gov/pubmed/37401863
http://dx.doi.org/10.1039/d3mh00888f
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author Radhakrishnan, Sambhu
Lejaegere, Charlotte
Duerinckx, Karel
Lo, Wei-Shang
Morais, Alysson F.
Dom, Dirk
Chandran, C. Vinod
Hermans, Ive
Martens, Johan A.
Breynaert, Eric
author_facet Radhakrishnan, Sambhu
Lejaegere, Charlotte
Duerinckx, Karel
Lo, Wei-Shang
Morais, Alysson F.
Dom, Dirk
Chandran, C. Vinod
Hermans, Ive
Martens, Johan A.
Breynaert, Eric
author_sort Radhakrishnan, Sambhu
collection PubMed
description Upon liquid phase adsorption of C(1)–C(5) primary alcohols on high silica MFI zeolites (Si/Al = 11.5–140), the concentration of adsorbed molecules largely exceeds the concentration of traditional adsorption sites: Brønsted acid and defect sites. Combining quantitative in situ(1)H MAS NMR, qualitative multinuclear NMR and IR spectroscopy, hydrogen bonding of the alcohol function to oxygen atoms of the zeolite siloxane bridges (Si–O–Si) was shown to drive the additional adsorption. This mechanism co-exists with chemi- and physi-sorption on Brønsted acid and defect sites and does not exclude cooperative effects from dispersive interactions.
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spelling pubmed-104635572023-08-30 Hydrogen bonding to oxygen in siloxane bonds drives liquid phase adsorption of primary alcohols in high-silica zeolites Radhakrishnan, Sambhu Lejaegere, Charlotte Duerinckx, Karel Lo, Wei-Shang Morais, Alysson F. Dom, Dirk Chandran, C. Vinod Hermans, Ive Martens, Johan A. Breynaert, Eric Mater Horiz Chemistry Upon liquid phase adsorption of C(1)–C(5) primary alcohols on high silica MFI zeolites (Si/Al = 11.5–140), the concentration of adsorbed molecules largely exceeds the concentration of traditional adsorption sites: Brønsted acid and defect sites. Combining quantitative in situ(1)H MAS NMR, qualitative multinuclear NMR and IR spectroscopy, hydrogen bonding of the alcohol function to oxygen atoms of the zeolite siloxane bridges (Si–O–Si) was shown to drive the additional adsorption. This mechanism co-exists with chemi- and physi-sorption on Brønsted acid and defect sites and does not exclude cooperative effects from dispersive interactions. The Royal Society of Chemistry 2023-06-27 /pmc/articles/PMC10463557/ /pubmed/37401863 http://dx.doi.org/10.1039/d3mh00888f Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Radhakrishnan, Sambhu
Lejaegere, Charlotte
Duerinckx, Karel
Lo, Wei-Shang
Morais, Alysson F.
Dom, Dirk
Chandran, C. Vinod
Hermans, Ive
Martens, Johan A.
Breynaert, Eric
Hydrogen bonding to oxygen in siloxane bonds drives liquid phase adsorption of primary alcohols in high-silica zeolites
title Hydrogen bonding to oxygen in siloxane bonds drives liquid phase adsorption of primary alcohols in high-silica zeolites
title_full Hydrogen bonding to oxygen in siloxane bonds drives liquid phase adsorption of primary alcohols in high-silica zeolites
title_fullStr Hydrogen bonding to oxygen in siloxane bonds drives liquid phase adsorption of primary alcohols in high-silica zeolites
title_full_unstemmed Hydrogen bonding to oxygen in siloxane bonds drives liquid phase adsorption of primary alcohols in high-silica zeolites
title_short Hydrogen bonding to oxygen in siloxane bonds drives liquid phase adsorption of primary alcohols in high-silica zeolites
title_sort hydrogen bonding to oxygen in siloxane bonds drives liquid phase adsorption of primary alcohols in high-silica zeolites
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10463557/
https://www.ncbi.nlm.nih.gov/pubmed/37401863
http://dx.doi.org/10.1039/d3mh00888f
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