Dielectric spectroscopy studies of conformational relaxation dynamics in molecular glass-forming liquids

We review experimental results obtained with broadband dielectric spectroscopy concerning the relaxation times and activation energies of intramolecular conformational relaxation processes in small-molecule glass-formers. Such processes are due to the interconversion between different conformers of...

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Autores: Romanini, Michela|||0000-0002-1685-855X, Macovez, Roberto|||0000-0001-5026-9372, Valenti, Sofia, Noor, Wahi, Tamarit Mur, José Luis|||0000-0002-7965-0000
Tipo de recurso: artículo
Fecha de publicación:2023
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/403413
Acceso en línea:https://hdl.handle.net/2117/403413
https://dx.doi.org/10.3390/ijms242417189
Access Level:acceso abierto
Palabra clave:Broadband dielectric spectroscopy
Molecular rotation
Glass manufacture -- Chemistry
Molecular conformers
Secondary relaxations
Activation barrier
Characteristic relaxation time
Internal rotation
Ring buckling
Ring inversion
Rotational isomerism
Rotació molecular
Vidre -- Fabricació -- Química
Àrees temàtiques de la UPC::Física::Física molecular
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spelling Dielectric spectroscopy studies of conformational relaxation dynamics in molecular glass-forming liquidsRomanini, Michela|||0000-0002-1685-855XMacovez, Roberto|||0000-0001-5026-9372Valenti, SofiaNoor, WahiTamarit Mur, José Luis|||0000-0002-7965-0000Broadband dielectric spectroscopyMolecular rotationGlass manufacture -- ChemistryMolecular conformersSecondary relaxationsActivation barrierCharacteristic relaxation timeInternal rotationRing bucklingRing inversionRotational isomerismRotació molecularVidre -- Fabricació -- QuímicaÀrees temàtiques de la UPC::Física::Física molecularWe review experimental results obtained with broadband dielectric spectroscopy concerning the relaxation times and activation energies of intramolecular conformational relaxation processes in small-molecule glass-formers. Such processes are due to the interconversion between different conformers of relatively flexible molecules, and generally involve conformational changes of flexible chain or ring moieties, or else the rigid rotation of planar groups, such as conjugated phenyl rings. Comparative analysis of molecules possessing the same (type of) functional group is carried out in order to test the possibility of assigning the dynamic conformational isomerism of given families of organic compounds to the motion of specific molecular subunits. These range from terminal halomethyl and acetyl/acetoxy groups to both rigid and flexible ring structures, such as the planar halobenzene cycles or the buckled saccharide and diazepine rings. A short section on polyesters provides a generalisation of these findings to synthetic macromolecules.This work was supported by the MICINN project PID2020-112975GB-I00 (Spain) and by the DGU project 2021SGR-00343 (Catalonia). M.R. acknowledges financial support from MICINN under the Juan de la Cierva fellowship (IJC2019-040225-I).Peer ReviewedObjectius de Desenvolupament Sostenible::3 - Salut i BenestarMultidisciplinary Digital Publishing Institute (MDPI)20232023-12-0620242024-02-28journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/403413https://dx.doi.org/10.3390/ijms242417189reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)InglésengAgencia Estatal de Investigación http://doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020 PID2020-112975GB-I00 DESORDEN COMO HERRAMIENTA PARA EL APROVECHAMIENTO DE LA ENERGIAopen accesshttp://purl.org/coar/access_right/c_abf2Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/4034132026-05-27T15:37:01Z
dc.title.none.fl_str_mv Dielectric spectroscopy studies of conformational relaxation dynamics in molecular glass-forming liquids
title Dielectric spectroscopy studies of conformational relaxation dynamics in molecular glass-forming liquids
spellingShingle Dielectric spectroscopy studies of conformational relaxation dynamics in molecular glass-forming liquids
Romanini, Michela|||0000-0002-1685-855X
Broadband dielectric spectroscopy
Molecular rotation
Glass manufacture -- Chemistry
Molecular conformers
Secondary relaxations
Activation barrier
Characteristic relaxation time
Internal rotation
Ring buckling
Ring inversion
Rotational isomerism
Rotació molecular
Vidre -- Fabricació -- Química
Àrees temàtiques de la UPC::Física::Física molecular
title_short Dielectric spectroscopy studies of conformational relaxation dynamics in molecular glass-forming liquids
title_full Dielectric spectroscopy studies of conformational relaxation dynamics in molecular glass-forming liquids
title_fullStr Dielectric spectroscopy studies of conformational relaxation dynamics in molecular glass-forming liquids
title_full_unstemmed Dielectric spectroscopy studies of conformational relaxation dynamics in molecular glass-forming liquids
title_sort Dielectric spectroscopy studies of conformational relaxation dynamics in molecular glass-forming liquids
dc.creator.none.fl_str_mv Romanini, Michela|||0000-0002-1685-855X
Macovez, Roberto|||0000-0001-5026-9372
Valenti, Sofia
Noor, Wahi
Tamarit Mur, José Luis|||0000-0002-7965-0000
author Romanini, Michela|||0000-0002-1685-855X
author_facet Romanini, Michela|||0000-0002-1685-855X
Macovez, Roberto|||0000-0001-5026-9372
Valenti, Sofia
Noor, Wahi
Tamarit Mur, José Luis|||0000-0002-7965-0000
author_role author
author2 Macovez, Roberto|||0000-0001-5026-9372
Valenti, Sofia
Noor, Wahi
Tamarit Mur, José Luis|||0000-0002-7965-0000
author2_role author
author
author
author
dc.subject.none.fl_str_mv Broadband dielectric spectroscopy
Molecular rotation
Glass manufacture -- Chemistry
Molecular conformers
Secondary relaxations
Activation barrier
Characteristic relaxation time
Internal rotation
Ring buckling
Ring inversion
Rotational isomerism
Rotació molecular
Vidre -- Fabricació -- Química
Àrees temàtiques de la UPC::Física::Física molecular
topic Broadband dielectric spectroscopy
Molecular rotation
Glass manufacture -- Chemistry
Molecular conformers
Secondary relaxations
Activation barrier
Characteristic relaxation time
Internal rotation
Ring buckling
Ring inversion
Rotational isomerism
Rotació molecular
Vidre -- Fabricació -- Química
Àrees temàtiques de la UPC::Física::Física molecular
description We review experimental results obtained with broadband dielectric spectroscopy concerning the relaxation times and activation energies of intramolecular conformational relaxation processes in small-molecule glass-formers. Such processes are due to the interconversion between different conformers of relatively flexible molecules, and generally involve conformational changes of flexible chain or ring moieties, or else the rigid rotation of planar groups, such as conjugated phenyl rings. Comparative analysis of molecules possessing the same (type of) functional group is carried out in order to test the possibility of assigning the dynamic conformational isomerism of given families of organic compounds to the motion of specific molecular subunits. These range from terminal halomethyl and acetyl/acetoxy groups to both rigid and flexible ring structures, such as the planar halobenzene cycles or the buckled saccharide and diazepine rings. A short section on polyesters provides a generalisation of these findings to synthetic macromolecules.
publishDate 2023
dc.date.none.fl_str_mv 2023
2023-12-06
2024
2024-02-28
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/2117/403413
https://dx.doi.org/10.3390/ijms242417189
url https://hdl.handle.net/2117/403413
https://dx.doi.org/10.3390/ijms242417189
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Agencia Estatal de Investigación http://doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020 PID2020-112975GB-I00 DESORDEN COMO HERRAMIENTA PARA EL APROVECHAMIENTO DE LA ENERGIA
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 Multidisciplinary Digital Publishing Institute (MDPI)
publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute (MDPI)
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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