Luminescent and magnetic tb-mof flakes deposited on silicon

Bartolomé E. ; Arauzo A. (Universidad de Zaragoza) ; Herce S. ; Palau A. ; Mestres N. ; Fuertes S. ; Sevilla P. ; Settineri N.S. ; Navarro-Spreafico L. ; González J. ; Sañudo E.C.

Resumen: The synthesis of a terbium-based 2D metal–organic framework (MOF), of formula [Tb(MeCOO)(PhCOO)2 ] (1), a crystalline material formed by neutral nanosheets held together by Van der Waals interactions, is presented. The material can be easily exfoliated by sonication and deposited onto different substrates. Uniform distributions of Tb-2D MOF flakes onto silicon were obtained by spin-coating. We report the luminescent and magnetic properties of the deposited flakes compared with those of the bulk. Complex 1 is luminescent in the visible and has a sizeable quantum yield of QY = 61% upon excitation at 280 nm. Photoluminescence measurements performed using a micro-Raman set up allowed us to characterize the luminescent spectra of individual flakes on silicon. Magnetization measurements of flakes-on-silicon with the applied magnetic field in-plane and out-of-plane display anisotropy. Ac susceptibility measurements show that 1 in bulk exhibits field-induced slow relaxation of the magnetization through two relaxation paths and the slowest one, with a relaxation time of tlf ˜ 0.5 s, is assigned to a direct process mechanism. The reported exfoliation of lanthanide 2D-MOFs onto substrates is an attractive approach for the development of multifunctional materials and devices for different applications. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Idioma: Inglés

DOI: 10.3390/molecules26185503

Año: 2021

Publicado en: Molecules 26, 18 (2021), 26185503 [13 pp.]
ISSN: 1420-3049

Factor impacto JCR: 4.927 (2021)

Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 65 / 179 = 0.363 (2021) - Q2 - T2
Categ. JCR: BIOCHEMISTRY & MOLECULAR BIOLOGY rank: 114 / 297 = 0.384 (2021) - Q2 - T2

Factor impacto CITESCORE: 5.9 - Pharmacology, Toxicology and Pharmaceutics (Q2) - Biochemistry, Genetics and Molecular Biology (Q2)

Factor impacto SCIMAGO: 0.705 - Analytical Chemistry (Q1) - Drug Discovery (Q1) - Pharmaceutical Science (Q1) - Molecular Medicine (Q1) - Organic Chemistry (Q1) - Medicine (miscellaneous) (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA/E12-20R RASMIA
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2017-83468-R
Financiación: info:eu-repo/grantAgreement/ES/MINECO/PGC2018-098630-B-I00

Tipo y forma: Article (Published version)

Área (Departamento): Servicios. Div.Caract.Físi.Quí (Serv.Gral. Apoyo Investigación)