Steric crowding of a series of pyridine based ligands influencing the photophysical properties of Zn(II) complexes

Zn(II) complexes containing N, N,N and N,N,N pyridine (dPy) ligands tend to display improved fluorescence efficiencies in comparison with their starting ligands benefiting from the chelation enhanced effect (CHEF) and preventing photoinduced electron transfer (PET) mechanisms by the coordination of...

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Autores: Ejarque, Daniel, Calvet Pallàs, Maria Teresa, Font Bardia, Ma. Mercedes, Pons, Josefina
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2021
País:España
Recursos:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/183511
Acesso em linha:https://hdl.handle.net/2445/183511
Access Level:acceso abierto
Palavra-chave:Difracció de raigs X
Compostos organometàl·lics
Estructura cristal·lina (Sòlids)
X-rays diffraction
Organometallic compounds
Layer structure (Solids)
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spelling Steric crowding of a series of pyridine based ligands influencing the photophysical properties of Zn(II) complexesEjarque, DanielCalvet Pallàs, Maria TeresaFont Bardia, Ma. MercedesPons, JosefinaDifracció de raigs XCompostos organometàl·licsEstructura cristal·lina (Sòlids)X-rays diffractionOrganometallic compoundsLayer structure (Solids)Zn(II) complexes containing N, N,N and N,N,N pyridine (dPy) ligands tend to display improved fluorescence efficiencies in comparison with their starting ligands benefiting from the chelation enhanced effect (CHEF) and preventing photoinduced electron transfer (PET) mechanisms by the coordination of their lone pair electrons. Nevertheless, the size of Zn(II) makes steric crowding an important factor to be considered, since it can promote the elongation of the coordination bonds that weakens their strength and favors the reduction of fluorescence efficiencies through PET processes. For that reason, in this contribution we have performed a systematic study of Zn(II) compounds based on α-acetamidocinnamic acid (HACA) and a comprehensive range of dPy ligands with increasing bulkiness (pyridine (py) (1), 3-phenylpyridine (3-phpy) (2), 2,2′-bipyridine (2,2′-bipy) (3), 1,10-phenanthroline (1,10-phen) (4), 2,2′:6′,2′′-terpyridine (terpy) (5) and 4′-(4-methylphenyl)-2,2′:6′,2″-terpyridine (mpterpy) (6)), which has allowed the equilibrium between CHEF and steric crowding effects to be studied. The elucidation of the six crystal structures revealed the formation of one coordination polymer (1) and five monomeric complexes (2-6). All of them have been characterized by analytical and spectroscopic techniques, and their molecular and supramolecular structures have been discussed. Furthermore, the UV-vis and photoluminescence properties have been recorded and their quantum yield (Φ) values have been calculated. Finally, it has been observed that even though the CHEF has a favorable impact on the fluorescence properties, the steric crowding of the ligands has been imposed, leading to fluorescence quenching.Royal Society of Chemistry2022202220212022info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersion34 p.application/pdfhttps://hdl.handle.net/2445/183511Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésVersió postprint del document publicat a: https://doi.org/10.1039/d1ce00833aCrystengcomm, 2021, vol. 23, p. 6199-6213https://doi.org/10.1039/d1ce00833a(c) Ejarque, Daniel et al., 2021info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1835112026-05-29T05:05:01Z
dc.title.none.fl_str_mv Steric crowding of a series of pyridine based ligands influencing the photophysical properties of Zn(II) complexes
title Steric crowding of a series of pyridine based ligands influencing the photophysical properties of Zn(II) complexes
spellingShingle Steric crowding of a series of pyridine based ligands influencing the photophysical properties of Zn(II) complexes
Ejarque, Daniel
Difracció de raigs X
Compostos organometàl·lics
Estructura cristal·lina (Sòlids)
X-rays diffraction
Organometallic compounds
Layer structure (Solids)
title_short Steric crowding of a series of pyridine based ligands influencing the photophysical properties of Zn(II) complexes
title_full Steric crowding of a series of pyridine based ligands influencing the photophysical properties of Zn(II) complexes
title_fullStr Steric crowding of a series of pyridine based ligands influencing the photophysical properties of Zn(II) complexes
title_full_unstemmed Steric crowding of a series of pyridine based ligands influencing the photophysical properties of Zn(II) complexes
title_sort Steric crowding of a series of pyridine based ligands influencing the photophysical properties of Zn(II) complexes
dc.creator.none.fl_str_mv Ejarque, Daniel
Calvet Pallàs, Maria Teresa
Font Bardia, Ma. Mercedes
Pons, Josefina
author Ejarque, Daniel
author_facet Ejarque, Daniel
Calvet Pallàs, Maria Teresa
Font Bardia, Ma. Mercedes
Pons, Josefina
author_role author
author2 Calvet Pallàs, Maria Teresa
Font Bardia, Ma. Mercedes
Pons, Josefina
author2_role author
author
author
dc.subject.none.fl_str_mv Difracció de raigs X
Compostos organometàl·lics
Estructura cristal·lina (Sòlids)
X-rays diffraction
Organometallic compounds
Layer structure (Solids)
topic Difracció de raigs X
Compostos organometàl·lics
Estructura cristal·lina (Sòlids)
X-rays diffraction
Organometallic compounds
Layer structure (Solids)
description Zn(II) complexes containing N, N,N and N,N,N pyridine (dPy) ligands tend to display improved fluorescence efficiencies in comparison with their starting ligands benefiting from the chelation enhanced effect (CHEF) and preventing photoinduced electron transfer (PET) mechanisms by the coordination of their lone pair electrons. Nevertheless, the size of Zn(II) makes steric crowding an important factor to be considered, since it can promote the elongation of the coordination bonds that weakens their strength and favors the reduction of fluorescence efficiencies through PET processes. For that reason, in this contribution we have performed a systematic study of Zn(II) compounds based on α-acetamidocinnamic acid (HACA) and a comprehensive range of dPy ligands with increasing bulkiness (pyridine (py) (1), 3-phenylpyridine (3-phpy) (2), 2,2′-bipyridine (2,2′-bipy) (3), 1,10-phenanthroline (1,10-phen) (4), 2,2′:6′,2′′-terpyridine (terpy) (5) and 4′-(4-methylphenyl)-2,2′:6′,2″-terpyridine (mpterpy) (6)), which has allowed the equilibrium between CHEF and steric crowding effects to be studied. The elucidation of the six crystal structures revealed the formation of one coordination polymer (1) and five monomeric complexes (2-6). All of them have been characterized by analytical and spectroscopic techniques, and their molecular and supramolecular structures have been discussed. Furthermore, the UV-vis and photoluminescence properties have been recorded and their quantum yield (Φ) values have been calculated. Finally, it has been observed that even though the CHEF has a favorable impact on the fluorescence properties, the steric crowding of the ligands has been imposed, leading to fluorescence quenching.
publishDate 2021
dc.date.none.fl_str_mv 2021
2022
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/183511
url https://hdl.handle.net/2445/183511
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: https://doi.org/10.1039/d1ce00833a
Crystengcomm, 2021, vol. 23, p. 6199-6213
https://doi.org/10.1039/d1ce00833a
dc.rights.none.fl_str_mv (c) Ejarque, Daniel et al., 2021
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) Ejarque, Daniel et al., 2021
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 34 p.
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 Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,198674

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