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Ferrocene Introduced into 5-Methylresorcinol-Based Organic Aerogels

The polycondensation sol–gel reaction of 5-methylresocinol and formaldehyde with additional compounds in reaction media is a relatively simple way to produce modified aerogels. In order to obtain aerogels with a large surface area and high porosity, the conditions for gel formation, the solvent exch...

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Autores principales: Erkhova, Ludmila V., Presniakov, Igor A., Afanasov, Michail I., Lemenovskiy, Dmitry A., Yu, Haojie, Wang, Li, Danilson, Mati, Koel, Mihkel
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7407292/
https://www.ncbi.nlm.nih.gov/pubmed/32708747
http://dx.doi.org/10.3390/polym12071582
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author Erkhova, Ludmila V.
Presniakov, Igor A.
Afanasov, Michail I.
Lemenovskiy, Dmitry A.
Yu, Haojie
Wang, Li
Danilson, Mati
Koel, Mihkel
author_facet Erkhova, Ludmila V.
Presniakov, Igor A.
Afanasov, Michail I.
Lemenovskiy, Dmitry A.
Yu, Haojie
Wang, Li
Danilson, Mati
Koel, Mihkel
author_sort Erkhova, Ludmila V.
collection PubMed
description The polycondensation sol–gel reaction of 5-methylresocinol and formaldehyde with additional compounds in reaction media is a relatively simple way to produce modified aerogels. In order to obtain aerogels with a large surface area and high porosity, the conditions for gel formation, the solvent exchange process before drying, and the supercritical drying process were optimized. A successful attempt was made to introduce ferrocene units into 5-methylresocinol-formaldehyde-based aerogels. The resulting aerogels are amorphous substrates, and no aggregated ferrocene units were found in their structures. All of the aerogel samples that were obtained are structurally similar despite differences in the original ferrocene units and their initial concentration. It was found that the inclusion limit of ferrocene structural blocks into an aerogel is ~6% wt. The structures of the inclusions in which all of the Fe atoms in the aerogel substrates were present in ferrocene/ferrocenium at an approximate ratio of 60/40 to 55/45 were confirmed by X-ray photoelectron spectroscopy and Mössbauer spectroscopy. Aerogels with ferrocene/ferrocenium inclusions are likely to exhibit reversible redox activity in reactions with gaseous reagents.
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spelling pubmed-74072922020-08-11 Ferrocene Introduced into 5-Methylresorcinol-Based Organic Aerogels Erkhova, Ludmila V. Presniakov, Igor A. Afanasov, Michail I. Lemenovskiy, Dmitry A. Yu, Haojie Wang, Li Danilson, Mati Koel, Mihkel Polymers (Basel) Article The polycondensation sol–gel reaction of 5-methylresocinol and formaldehyde with additional compounds in reaction media is a relatively simple way to produce modified aerogels. In order to obtain aerogels with a large surface area and high porosity, the conditions for gel formation, the solvent exchange process before drying, and the supercritical drying process were optimized. A successful attempt was made to introduce ferrocene units into 5-methylresocinol-formaldehyde-based aerogels. The resulting aerogels are amorphous substrates, and no aggregated ferrocene units were found in their structures. All of the aerogel samples that were obtained are structurally similar despite differences in the original ferrocene units and their initial concentration. It was found that the inclusion limit of ferrocene structural blocks into an aerogel is ~6% wt. The structures of the inclusions in which all of the Fe atoms in the aerogel substrates were present in ferrocene/ferrocenium at an approximate ratio of 60/40 to 55/45 were confirmed by X-ray photoelectron spectroscopy and Mössbauer spectroscopy. Aerogels with ferrocene/ferrocenium inclusions are likely to exhibit reversible redox activity in reactions with gaseous reagents. MDPI 2020-07-16 /pmc/articles/PMC7407292/ /pubmed/32708747 http://dx.doi.org/10.3390/polym12071582 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
Erkhova, Ludmila V.
Presniakov, Igor A.
Afanasov, Michail I.
Lemenovskiy, Dmitry A.
Yu, Haojie
Wang, Li
Danilson, Mati
Koel, Mihkel
Ferrocene Introduced into 5-Methylresorcinol-Based Organic Aerogels
title Ferrocene Introduced into 5-Methylresorcinol-Based Organic Aerogels
title_full Ferrocene Introduced into 5-Methylresorcinol-Based Organic Aerogels
title_fullStr Ferrocene Introduced into 5-Methylresorcinol-Based Organic Aerogels
title_full_unstemmed Ferrocene Introduced into 5-Methylresorcinol-Based Organic Aerogels
title_short Ferrocene Introduced into 5-Methylresorcinol-Based Organic Aerogels
title_sort ferrocene introduced into 5-methylresorcinol-based organic aerogels
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7407292/
https://www.ncbi.nlm.nih.gov/pubmed/32708747
http://dx.doi.org/10.3390/polym12071582
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