000171064 001__ 171064
000171064 005__ 20260505142650.0
000171064 0247_ $$2doi$$a10.1016/j.optmat.2026.118113
000171064 0248_ $$2sideral$$a149152
000171064 037__ $$aART-2026-149152
000171064 041__ $$aeng
000171064 100__ $$0(orcid)0000-0003-4520-8772$$aMaurin-Pasturel, Guillaume
000171064 245__ $$aEnhanced luminescence of (Eu3+/Sm3+)(diketone)3(N-Base) complexes enabled by ancillary ligands
000171064 260__ $$c2026
000171064 5060_ $$aAccess copy available to the general public$$fUnrestricted
000171064 5203_ $$aLanthanide β-diketonate complexes are prominent luminescent materials due to their intense, spectrally pure emissions and their broad utility in sensing, display technologies, and photonics. Their efficiency, however, depends critically on the effectiveness of ligand-to-metal energy transfer and the suppression of non-radiative deactivation. Introducing ancillary N-donor ligands enhances these processes by improving energy-transfer efficiency and reducing vibrational quenching. We report a family of Eu3+ and Sm3+ complexes of general formula LnL3L*, where L is a β-diketonate (4,4,4- trifluoro-1-phenyl-1,3-butanedionate, btfa− , or 2-thenoyltrifluoroacetate, tta− ) and L* a bidentate (1,10-phenanthroline) or tridentate (terpyridine derivatives) N-donor ligand. The complexes were synthesized and characterized by single-crystal and powder X-ray diffraction, Raman, and IR spectroscopies. Photophysical measurements, supported by computational analysis, reveal clear structure–property correlations. All complexes exhibit markedly enhanced emission relative to the parent LnL3⋅2H2O species (Ln = Eu and Sm). The highest luminescence intensities were obtained with 4′(4-methyl)-2,2′:6′,2″-terpyridine, followed by 1,10-phenanthroline, 2,2′:6′,2″-terpyridine, and 2,6-bis(5-(p-methoxyphenyl)-1H-pyrazol-3-yl)pyridine. Overall, these results
highlight the critical role of ancillary N-donor ligands in tuning lanthanide photophysics, thereby enabling enhanced emission efficiency and tailored optical properties for advanced luminescent technologies.
000171064 536__ $$9info:eu-repo/grantAgreement/ES/DGA/E11-17R$$9info:eu-repo/grantAgreement/ES/DGA/E17-23R$$9info:eu-repo/grantAgreement/ES/DGA/LMP220_21$$9info:eu-repo/grantAgreement/ES/MICINN/PID2021-124354NB-I00$$9info:eu-repo/grantAgreement/ES/MICIU/RYC2024-048927-I
000171064 540__ $$9info:eu-repo/semantics/embargoedAccess$$aby-nc-nd$$uhttps://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
000171064 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion
000171064 700__ $$0(orcid)0000-0001-7625-4806$$aPiñol, Rafael
000171064 700__ $$0(orcid)0000-0002-9258-7907$$aCases, Rafael$$uUniversidad de Zaragoza
000171064 700__ $$aBrites, Carlos D.S.
000171064 700__ $$aSaraiva, Leonardo F.
000171064 700__ $$aCarneiro Neto, Albano N.
000171064 700__ $$0(orcid)0000-0002-5881-9698$$aAra, Irene$$uUniversidad de Zaragoza
000171064 700__ $$0(orcid)0000-0002-0444-996X$$aFalvello, Larry
000171064 700__ $$0(orcid)0000-0002-5793-2058$$aSanjuán, Marisa
000171064 700__ $$aCarlos, Luís D.
000171064 700__ $$0(orcid)0000-0003-0828-3212$$aMillán, Angel
000171064 7102_ $$12010$$2760$$aUniversidad de Zaragoza$$bDpto. Química Inorgánica$$cÁrea Química Inorgánica
000171064 7102_ $$12003$$2395$$aUniversidad de Zaragoza$$bDpto. Física Materia Condensa.$$cÁrea Física Materia Condensada
000171064 773__ $$g176 (2026), 118113 [11 pp.]$$pOpt. mater.$$tOptical Materials$$x0925-3467
000171064 8564_ $$s2024737$$uhttps://zaguan.unizar.es/record/171064/files/texto_completo.pdf$$yPostprint$$zinfo:eu-repo/date/embargoEnd/2028-04-16
000171064 8564_ $$s1153937$$uhttps://zaguan.unizar.es/record/171064/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint$$zinfo:eu-repo/date/embargoEnd/2028-04-16
000171064 909CO $$ooai:zaguan.unizar.es:171064$$particulos$$pdriver
000171064 951__ $$a2026-05-05-13:36:55
000171064 980__ $$aARTICLE