Strongly luminescent Pt(IV) complexes with a Mesoionic N-Heterocyclic Carbene Ligand: tuning their photophysical properties.

Vivancos Ureña, Ángela; Jiménez García, Adrián; Bautista, Delia; González Herrero, Pablo

Publication:
Strongly luminescent Pt(IV) complexes with a Mesoionic N-Heterocyclic Carbene Ligand: tuning their photophysical properties.

dc.contributor.author	Vivancos Ureña, Ángela
dc.contributor.author	Jiménez García, Adrián
dc.contributor.author	Bautista, Delia
dc.contributor.author	González Herrero, Pablo
dc.contributor.department	Química Inorgánica
dc.date.accessioned	2024-01-30T12:50:38Z
dc.date.available	2024-01-30T12:50:38Z
dc.date.copyright	© 2021 American Chemical Society
dc.date.issued	2021-02-09
dc.description.abstract	The synthesis, electrochemistry, and photophysical properties of a series of bis-cyclometalated Pt(IV) complexes that combine the mesoionic aryl-NHC ligand 4-butyl-3-methyl-1-phenyl-1H-1,2,3-triazol-5-ylidene (trz) with either 1-phenylpyrazole or 2-arylpyridine (C∧N) are reported. The complexes (OC-6-54)-[PtCl2(C∧N)(trz)] bearing cyclometalating 2-arylpyridines present phosphorescent emissions in the blue to yellow color range, which essentially arise from 3LC(C∧N) states, and reach quantum yields of ca. 0.3 in fluid solutions and almost unity in poly(methyl methacrylate) (PMMA) matrices at 298 K, thus representing a class of strong emitters with tunable properties. A systematic comparison with the homologous C2-symmetrical species (OC-6-33)-[PtCl2(C∧N)2], which contains two equal 2-arylpyridine ligands, shows that the introduction of a trz ligand leads to significantly lower nonradiative decay rates and higher quantum efficiencies. Computational calculations substantiate the effect of the carbene ligand, which raises the energy of dσ* orbitals in these derivatives and results in the higher energies of nonemissive deactivating 3LMCT states. In contrast, the isomers (OC-6-42)-[PtCl2(C∧N)(trz)] are not luminescent because they present a 3LMCT state as the lowest triplet.	es
dc.format	application/pdf	es
dc.format.extent	14	es
dc.identifier.doi	https://doi.org/10.1021/acs.inorgchem.1c00410
dc.identifier.uri	http://hdl.handle.net/10201/138158
dc.language	eng	es
dc.relation	MCIN/AEI/10.13039/501100011033 and “ERDF A way of making Europe,” proyecto PGC2018-100719−B-I00. Fundación Séneca-Agencia de Ciencia y Tecnología de la Región de Murcia, contrato 20398/SF/17 y proyecto 19890/GERM/15.	es
dc.rights	info:eu-repo/semantics/openAccess	es
dc.rights	Atribución 4.0 Internacional	*
dc.rights.uri	http://creativecommons.org/licenses/by/4.0/	*
dc.subject	Platino	es
dc.subject	Luminiscencia
dc.subject	Complejos ciclometalados
dc.subject.other	CDU::5 - Ciencias puras y naturales::54 - Química::546 - Química inorgánica	es
dc.title	Strongly luminescent Pt(IV) complexes with a Mesoionic N-Heterocyclic Carbene Ligand: tuning their photophysical properties.	es
dc.type	info:eu-repo/semantics/article	es
dc.type.version	info:eu-repo/semantics/publishedVersion
dspace.entity.type	Publication	es
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