Exploring the Slow Magnetic Relaxation of a Family of Photoluminescent 3D Lanthanide–Organic Frameworks Based on Dicarboxylate Ligands Oyarzabal, Itziar Rojas Macías, Sara Parejo, Ana Delia Salinas Castillo, Alfonso Rodríguez Diéguez, Antonio Lanthanide–organic frameworks 9,10‐anthracenedicarboxylate 2,5‐diaminotereph‐ thalate Dinuclear building unit Photoluminescence Slow relaxation of magnetization Acetone sensor A family of metal–organic frameworks with general formula {[Nd2(ant)2((NH2)2‐ bdc)(DMF)4]∙2DMF}n (1) and {[Ln2(ant)2((NH2)2‐bdc)(DMF)4]∙2DMF∙2H2O}n (Ln = Tb (2), Ho (3), and Er (4)) has been obtained from reactions between 9,10‐anthracenedicarboxylic (H2ant) and 2,5‐dia‐ minoterephthalic ((NH2)2‐H2bdc) acids, and lanthanide ions in dimethylformamide (DMF). These lanthanide–organic frameworks (LnOFs) have been characterized, and their crystal structures have been elucidated by single crystal and powder X‐ray diffraction methods (on the basis of a compar‐ ative refinement with similar structures), respectively for 1 and 2–4. All LnOFs present three‐di‐ mensional structures composed of dinuclear [Ln2(μ‐CO2)4] entities linked through both carboxylate ligands that yield open frameworks in which DMF and water molecules are located in the channels. Magnetic studies of these LnOFs have revealed slow relaxation of the magnetization for the Nd‐ based counterpart. The compounds also acknowledge relevant photoluminescence (PL) emissions in the visible (for the Tb‐based homologue) and near‐infrared (for the Nd‐ and Er‐based com‐ pounds) regions. The strong green emission yielded by compound 2 at room temperature allows its study for photoluminescence (PL) sensing of various solvent molecules, finding a particular dis‐ crimination for acetone. 2021-03-17T07:42:11Z 2021-03-17T07:42:11Z 2021 info:eu-repo/semantics/article : Oyarzabal, I.; Rojas, S.; Parejo, A.D.; Salinas‐Castillo, A.; García, J.A.; Seco, J.M.; Cepeda, J.; Rodríguez‐Diéguez, A. Exploring the Slow Magnetic Relaxation of a Family of Photoluminescent 3D Lanthanide‐Organic Frameworks Based on Dicarboxylate Ligands. Magnetochemistry 2021, 7, 41. https://doi.org/10.3390/ magnetochemistry7030041 http://hdl.handle.net/10481/67278 10.3390/magnetochemistry7030041 eng http://creativecommons.org/licenses/by/3.0/es/ info:eu-repo/semantics/openAccess Atribución 3.0 España MDPI