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Article Dans Une Revue Journal of Materials Chemistry C Année : 2024

Linker installation transformations in a 2-D rare earth MOF: increase of the dimensionality and turn on of the temperature sensing capability

Résumé

A new family of 2-D 8-connected rare earth (RE) MOFs based on a hexanuclear (RE3+)(6) secondary building unit (SBU), the increase of the dimensionality through single-crystal-to-single-crystal (SCSC) linker installation reactions and the turn-on of the temperature sensing capability upon these reactions are reported. The reaction of RE(NO3)(3) with 4,4 '-(hydroxymethylene)dibenzoic acid (H2BCPM) in the presence of 2-fluorobenzoic acid (HFBA) in DMF/H2O at 115 degrees C afforded compounds [RE6(mu(3)-OH-/F-)(8)(BCPM)(4)(NO3)(2)(H2O)(4)](n) (UCY-17(RE); RE: Y, Gd, Tb, Dy, Ho, Er) which represent rare examples of 2D 8-c MOFs based on a hexanuclear (RE3+)(6) SBU. The excellent quality of single crystals of UCY-17(Tb) and the distance between the terminal nitrate ions prompted us to investigate the SCSC exchange of NO3- anions by various dicarboxylate ligands aiming to bridge adjacent 2D nanosheets and form 3-D analogues. These SCSC linker installation reactions afforded a series of 3-D, 10-connected mixed linker MOFs with the general formulae [RE6(mu(3)-OH-/F-)(8)(BCPM)(4)(L)(H2O)(4)](n) (UCY-17(Tb)/L; H2L = H2BDC (1,4-benzenedicarboxylic acid), H(2)ABDC (2-aminobenzene-1,4-dicarboxylic acid), H2FBDC (2-fluorobenzene-1,4-dicarboxylic acid), and H2NDC (1,4-naphthalenedicarboxylic acid)). The exchanged analogues of UCY-17(Gd) and UCY-17(Eu0.05Tb0.95) were synthesized and the thermometric properties of the latter were investigated. These studies revealed that there is no thermal evolution of the emission properties for the pristine MOF UCY-17(Eu0.05Tb0.95) whereas the exchanged analogues exhibit significant thermometric properties at higher temperatures (>270 K). The maximum thermal sensitivity of most exchanged derivatives appears at physiological temperatures and ranges between 300 and 355 K. Overall, this work proposes a promising strategy for increasing the dimensionality of 2-D MOFs and controlling the thermometric performances of mixed Eu0.05Tb0.95 MOFs.
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Dates et versions

hal-04597720 , version 1 (03-06-2024)

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Laoura Komodiki, Nikos Panagiotou, Hélène Serier-Brault, Anastasios Tasiopoulos. Linker installation transformations in a 2-D rare earth MOF: increase of the dimensionality and turn on of the temperature sensing capability. Journal of Materials Chemistry C, 2024, ⟨10.1039/d4tc00992d⟩. ⟨hal-04597720⟩
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