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Effect of the change of the ancillary carboxylate bridging ligand on the SMM and luminescence properties of a series of carboxylate-diphenoxido triply bridged dinuclear ZnLn and tetranuclear Zn2Ln2 complexes (Ln = Dy, Er)
dc.contributor.author | Echenique Errandonea, Estitxu | |
dc.contributor.author | Zabala Lekuona, Andoni | |
dc.contributor.author | Cepeda Ruiz, Javier | |
dc.contributor.author | Rodríguez Diéguez, Antonio | |
dc.contributor.author | Seco Botana, José Manuel | |
dc.contributor.author | Oyarzabal Epelde, Itziar | |
dc.contributor.author | Colacio Rodríguez, Enrique Emilio | |
dc.date.accessioned | 2024-02-08T11:21:01Z | |
dc.date.available | 2024-02-08T11:21:01Z | |
dc.date.issued | 2018-11-22 | |
dc.identifier.citation | Dalton Transactions 48 : 190-201 (2019) | |
dc.identifier.issn | 1477-9234 | |
dc.identifier.uri | http://hdl.handle.net/10810/65545 | |
dc.description.abstract | Eleven new dinuclear and tetranuclear compounds of general formulae [Zn(μ-L)(μ-X)Ln(NO3)2]·nS, [Zn2Dy2(μ3-L′)2(μ-sal)2(NO3)(CH3OH)](NO3)·5CH3OH and [Zn2Er2(μ3-L′)2(μ-sal)2(CH3OH)2](NO3)2·4CH3OH (X = benzoate, anthracenate, diclofenac, salicylate, 2,6-dihydroxybenzoate; Ln = Dy, Er; S = water, acetonitrile, methanol) were prepared from the N,N′-dimethyl-N,N′-bis(2-hydroxy-3-formyl-5-bromobenzyl)ethylenediamine compartmental ligand (H2L). Complexes 1–6 and 9–11 consist of diphenoxido-carboxylate triply bridged compounds, which differ mainly in the carboxylate bridging ligand. It should be noted that the acidic character of the salicylic acid promotes, in the presence of methanol, the methoxylation of the H2L ligand thereby yielding a hemiacetal H3L′, which is able to connect the Ln(III) ions of two ZnLn dinuclear units forming the Zn2Ln2 tetranuclear complexes 7 and 8. All compounds display SMM behaviour in the presence of an external field with effective energy barriers (Ueff) as high as 61 K. Magneto-structural data for these complexes reveal that their SMM behaviour is not only significantly affected by the type of Ln(III) ion but also by the carboxylate bridging ligand connecting the Zn(II) and Ln(III) ions. Photoluminescence properties have also been accomplished, showing that the ligands are able to sensitize lanthanide centred emissions in the visible and near-infrared regions with variable capacity. Moreover, the analysis of the luminescence decay curves reveals emission lifetimes in the range of few microsecond or hundreds of nanoseconds for Dy(III)-based or Er(III)-based luminophores, respectively. | es_ES |
dc.description.sponsorship | E. E. and A. Z. are grateful to the Government of the Basque Country for the predoctoral fellowship. The authors acknowledge technical and human support provided by SGIker of UPV/EHU and European funding (ERDF and ESF). Financial support from Ministerio de Economía y Competitividad (MINECO) for Project CTQ2014-56312-P, the Junta de Andalucía (FQM-1484 and FQM-195), Red Guipuzcoana de Ciencia, Tecnología e Innovación (OF188/2017), University of Granada and Universidad del País Vasco (UPV/EHU) (GIU17/13, EHUA16/32) is gratefully acknowledged. | |
dc.language.iso | eng | es_ES |
dc.publisher | Royal Society of Chemistry | |
dc.relation | info:eu-repo/grantAgreement/MINECO/CTQ2014-56312-P | |
dc.rights | info:eu-repo/semantics/openAccess | es_ES |
dc.subject | lanthanide | es_ES |
dc.subject | SMM | |
dc.subject | carboxylate | |
dc.subject | luminescence | |
dc.title | Effect of the change of the ancillary carboxylate bridging ligand on the SMM and luminescence properties of a series of carboxylate-diphenoxido triply bridged dinuclear ZnLn and tetranuclear Zn2Ln2 complexes (Ln = Dy, Er) | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.rights.holder | © 2019 The Royal Society of Chemistry | |
dc.relation.publisherversion | https://pubs.rsc.org/en/content/articlelanding/2019/dt/c8dt03800g | |
dc.identifier.doi | 10.1039/C8DT03800G | |
dc.departamentoes | Química aplicada | es_ES |
dc.departamentoeu | Kimika aplikatua | es_ES |