171053 20260505142650.0 doi 10.1039/d5tc03820k sideral 149142 ART-2026-149142 eng Liu, Xiaoming Pure and mixed {Nd/Yb} carborane-based metal–organic frameworks integrating slow magnetic relaxation, magnetocaloric effect and NIR emission 2026 Multi-lanthanide metal–organic frameworks (MOFs) offer a flexible route for designing multifunctional materials. Here we report a carborane-based isostructural series of MOFs of formula {[(NdyYb1−y)3(mCB-L)4(NO3)(DMF)x]n·Solv}, including the homometallic Nd (y = 1) and Yb (y = 0) compounds and a mixed Nd/Yb analogue (y = 0.44). Magnetic, magnetocaloric and near-infrared (NIR) optical properties were investigated by dc/ac magnetometry, X-ray absorption spectroscopy (XAS), X-ray magnetic circular dichroism (XMCD), and photoluminescence. Nd3+ and Yb3+ yield MOFs combining slow relaxation of the magnetization (U/kB ∼ 19 K), cryogenic magnetocaloric response (−ΔSm ∼ 1.6 R at 5 T, 1.8 K) and ion-centered NIR luminescence. Notably, the mixed Nd/Yb MOF further extends this multifunctionality by exhibiting dual NIR emission at 998 nm and 1060 nm arising from partial Nd → Yb energy transfer. These results underscore carborane ligands as effective blocks for engineering multi-lanthanide frameworks, and highlight {Nd/Yb} MOFs as multifunctional materials for quantum technologies, optical communication, and cryogenic cooling. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/AEI/CEX2023-001263-S info:eu-repo/grantAgreement/ES/DGA/E12-23R info:eu-repo/grantAgreement/ES/DGA/E17-23R info:eu-repo/grantAgreement/ES/MICINN/PID2022-136892NB-I00 info:eu-repo/grantAgreement/ES/MICINN/PID2022-138492NB-I00 info:eu-repo/grantAgreement/ES/MICIU/PID2021-122869NB-I00 info:eu-repo/semantics/openAccess by-nc https://creativecommons.org/licenses/by-nc/4.0/deed.es info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Arauzo, Ana Universidad de Zaragoza (orcid)0000-0002-5999-341X Fuertes, Sara (orcid)0000-0003-1812-3175 Giner Planas, José Bartolomé, Elena 2003 395 Universidad de Zaragoza Dpto. Física Materia Condensa. Área Física Materia Condensada (2026), [14 pp.] J. mater. chem. C Journal of materials chemistry. C 2050-7526 Supplementary Information https://www.rsc.org/suppdata/d5/tc/d5tc03820k/d5tc03820k1.pdf 4891866 http://zaguan.unizar.es/record/171053/files/texto_completo.pdf Versión publicada 2756896 http://zaguan.unizar.es/record/171053/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:171053 articulos driver 2026-05-05-13:36:41 ARTICLE