Improving the mesomorphism in bispyrazolate Pd(II) metallomesogens: an efficient platform for ionic conduction

The introduction of structural asymmetry in metallomesogens is an established strategy to improve their mesomorphic behaviour in terms of lower melting temperatures and higher stability ranges of the mesophase, which is particularly important for metallomesogens that have potential application as el...

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Autores: Cuerva de Alaiz, Cristian, Cano Esquivel, María Mercedes, Schmidt, Rainer
Formato: artículo
Fecha de publicación:2023
País:España
Recursos:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/93817
Acesso em linha:https://hdl.handle.net/20.500.14352/93817
Access Level:acceso abierto
Palavra-chave:538.9
Columnar mesophases
Pyrazolate ligands
Complexes
Física del estado sólido
2211 Física del Estado Sólido
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repository_id_str
spelling Improving the mesomorphism in bispyrazolate Pd(II) metallomesogens: an efficient platform for ionic conductionCuerva de Alaiz, CristianCano Esquivel, María MercedesSchmidt, Rainer538.9Columnar mesophasesPyrazolate ligandsComplexesFísica del estado sólido2211 Física del Estado SólidoThe introduction of structural asymmetry in metallomesogens is an established strategy to improve their mesomorphic behaviour in terms of lower melting temperatures and higher stability ranges of the mesophase, which is particularly important for metallomesogens that have potential application as electrolytes that require wide operational temperature ranges. Here in this work, a novel series of unsymmetrical bis(isoquinolinylpyrazolate)palladium(ii) compounds bearing four alkyl side-chains with different lengths are described. Rectangular and hexagonal columnar mesophases were formed with low melting temperatures of 42-45 degrees C in most cases, whereas the clearing temperatures reached values up to 412 degrees C. The charge transport properties have been studied by complex impedance spectroscopy, showing that the mesophase favours proton conduction in the absence of water or humidity. The exceptional thermal stability of these species makes them promising candidates to act as a platform for ionic conduction via the nanochannels originated in the columnar mesophases. The results presented confirm that introducing structural asymmetry in the Pd(ii) metallomesogens studied is a valid strategy to enhance the liquid crystalline properties, which opens new ways to develop water-free electrolytes based on unsymmetrical bis(isoquinolinylpyrazolate) Pd(ii) compounds for potential applications such as proton exchange membranes (PEMs).Royal Society of ChemistryUniversidad Complutense de Madrid20232023-02-0720232023-02-07journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/93817reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/938172026-06-02T12:44:21Z
dc.title.none.fl_str_mv Improving the mesomorphism in bispyrazolate Pd(II) metallomesogens: an efficient platform for ionic conduction
title Improving the mesomorphism in bispyrazolate Pd(II) metallomesogens: an efficient platform for ionic conduction
spellingShingle Improving the mesomorphism in bispyrazolate Pd(II) metallomesogens: an efficient platform for ionic conduction
Cuerva de Alaiz, Cristian
538.9
Columnar mesophases
Pyrazolate ligands
Complexes
Física del estado sólido
2211 Física del Estado Sólido
title_short Improving the mesomorphism in bispyrazolate Pd(II) metallomesogens: an efficient platform for ionic conduction
title_full Improving the mesomorphism in bispyrazolate Pd(II) metallomesogens: an efficient platform for ionic conduction
title_fullStr Improving the mesomorphism in bispyrazolate Pd(II) metallomesogens: an efficient platform for ionic conduction
title_full_unstemmed Improving the mesomorphism in bispyrazolate Pd(II) metallomesogens: an efficient platform for ionic conduction
title_sort Improving the mesomorphism in bispyrazolate Pd(II) metallomesogens: an efficient platform for ionic conduction
dc.creator.none.fl_str_mv Cuerva de Alaiz, Cristian
Cano Esquivel, María Mercedes
Schmidt, Rainer
author Cuerva de Alaiz, Cristian
author_facet Cuerva de Alaiz, Cristian
Cano Esquivel, María Mercedes
Schmidt, Rainer
author_role author
author2 Cano Esquivel, María Mercedes
Schmidt, Rainer
author2_role author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 538.9
Columnar mesophases
Pyrazolate ligands
Complexes
Física del estado sólido
2211 Física del Estado Sólido
topic 538.9
Columnar mesophases
Pyrazolate ligands
Complexes
Física del estado sólido
2211 Física del Estado Sólido
description The introduction of structural asymmetry in metallomesogens is an established strategy to improve their mesomorphic behaviour in terms of lower melting temperatures and higher stability ranges of the mesophase, which is particularly important for metallomesogens that have potential application as electrolytes that require wide operational temperature ranges. Here in this work, a novel series of unsymmetrical bis(isoquinolinylpyrazolate)palladium(ii) compounds bearing four alkyl side-chains with different lengths are described. Rectangular and hexagonal columnar mesophases were formed with low melting temperatures of 42-45 degrees C in most cases, whereas the clearing temperatures reached values up to 412 degrees C. The charge transport properties have been studied by complex impedance spectroscopy, showing that the mesophase favours proton conduction in the absence of water or humidity. The exceptional thermal stability of these species makes them promising candidates to act as a platform for ionic conduction via the nanochannels originated in the columnar mesophases. The results presented confirm that introducing structural asymmetry in the Pd(ii) metallomesogens studied is a valid strategy to enhance the liquid crystalline properties, which opens new ways to develop water-free electrolytes based on unsymmetrical bis(isoquinolinylpyrazolate) Pd(ii) compounds for potential applications such as proton exchange membranes (PEMs).
publishDate 2023
dc.date.none.fl_str_mv 2023
2023-02-07
2023
2023-02-07
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/93817
url https://hdl.handle.net/20.500.14352/93817
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Royal Society of Chemistry
publisher.none.fl_str_mv Royal Society of Chemistry
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300724

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