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Polyoxometalate Functionalized Sensors: A Review

Polyoxometalates (POMs) are a class of metal oxide complexes with a large structural diversity. Effective control of the final chemical and physical properties of POMs could be provided by fine-tuning chemical modifications, such as the inclusion of other metals or non-metal ions. In addition, the n...

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Autores principales: Veríssimo, Marta I. S., Evtuguin, Dmitry V., Gomes, M. Teresa S. R.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8964365/
https://www.ncbi.nlm.nih.gov/pubmed/35372262
http://dx.doi.org/10.3389/fchem.2022.840657
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author Veríssimo, Marta I. S.
Evtuguin, Dmitry V.
Gomes, M. Teresa S. R.
author_facet Veríssimo, Marta I. S.
Evtuguin, Dmitry V.
Gomes, M. Teresa S. R.
author_sort Veríssimo, Marta I. S.
collection PubMed
description Polyoxometalates (POMs) are a class of metal oxide complexes with a large structural diversity. Effective control of the final chemical and physical properties of POMs could be provided by fine-tuning chemical modifications, such as the inclusion of other metals or non-metal ions. In addition, the nature and type of the counterion can also impact POM properties, like solubility. Besides, POMs may combine with carbon materials as graphene oxide, reduced graphene oxide or carbon nanotubes to enhance electronic conductivity, with noble metal nanoparticles to increase catalytic and functional sites, be introduced into metal-organic frameworks to increase surface area and expose more active sites, and embedded into conducting polymers. The possibility to design POMs to match properties adequate for specific sensing applications turns them into highly desirable chemicals for sensor sensitive layers. This review intends to provide an overview of POM structures used in sensors (electrochemical, optical, and piezoelectric), highlighting their main functional features. Furthermore, this review aims to summarize the reported applications of POMs in sensors for detecting and determining analytes in different matrices, many of them with biochemical and clinical relevance, along with analytical figures of merit and main virtues and problems of such devices. Special emphasis is given to the stability of POMs sensitive layers, detection limits, selectivity, the pH working range and throughput.
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spelling pubmed-89643652022-03-31 Polyoxometalate Functionalized Sensors: A Review Veríssimo, Marta I. S. Evtuguin, Dmitry V. Gomes, M. Teresa S. R. Front Chem Chemistry Polyoxometalates (POMs) are a class of metal oxide complexes with a large structural diversity. Effective control of the final chemical and physical properties of POMs could be provided by fine-tuning chemical modifications, such as the inclusion of other metals or non-metal ions. In addition, the nature and type of the counterion can also impact POM properties, like solubility. Besides, POMs may combine with carbon materials as graphene oxide, reduced graphene oxide or carbon nanotubes to enhance electronic conductivity, with noble metal nanoparticles to increase catalytic and functional sites, be introduced into metal-organic frameworks to increase surface area and expose more active sites, and embedded into conducting polymers. The possibility to design POMs to match properties adequate for specific sensing applications turns them into highly desirable chemicals for sensor sensitive layers. This review intends to provide an overview of POM structures used in sensors (electrochemical, optical, and piezoelectric), highlighting their main functional features. Furthermore, this review aims to summarize the reported applications of POMs in sensors for detecting and determining analytes in different matrices, many of them with biochemical and clinical relevance, along with analytical figures of merit and main virtues and problems of such devices. Special emphasis is given to the stability of POMs sensitive layers, detection limits, selectivity, the pH working range and throughput. Frontiers Media S.A. 2022-03-08 /pmc/articles/PMC8964365/ /pubmed/35372262 http://dx.doi.org/10.3389/fchem.2022.840657 Text en Copyright © 2022 Veríssimo, Evtuguin and Gomes. https://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
Veríssimo, Marta I. S.
Evtuguin, Dmitry V.
Gomes, M. Teresa S. R.
Polyoxometalate Functionalized Sensors: A Review
title Polyoxometalate Functionalized Sensors: A Review
title_full Polyoxometalate Functionalized Sensors: A Review
title_fullStr Polyoxometalate Functionalized Sensors: A Review
title_full_unstemmed Polyoxometalate Functionalized Sensors: A Review
title_short Polyoxometalate Functionalized Sensors: A Review
title_sort polyoxometalate functionalized sensors: a review
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8964365/
https://www.ncbi.nlm.nih.gov/pubmed/35372262
http://dx.doi.org/10.3389/fchem.2022.840657
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