Solvothermal reactions between three bis-pyridine-bis-amide ligands containing a fluorene scaffold bearing different substituents on the C9 position (CH2, 1; CMe2 , 2; CO, 3) with 2,6-naphthalenedicarboxylic acid (H2ndca) and Zn(NO3)2·6H2O led to the isolation of three new microporous mixed-ligand MOFs (PUM310, containing 1; PUM310Me2, containing 2; PUM310CO, containing 3). The structural characterization conducted with X-ray quality single crystals revealed parallel polycatenated frameworks of thick layers in all cases, corresponding to the topological type 5,6L18. The entangled nets contain complete and truncated Zn-paddle wheels. In the truncated paddle wheel, a pyridine of the bis-amide linker has been replaced by a DMF molecule. Solvent removal leads to framework rearrangement, as evidenced by XRPD analysis performed on desolvated PUM310, with consequent framework shrinkage as also evidenced by volumetric adsorption analyses. The three MOFs are fluorescent in the solid state. The optical spectra are indicative of a Förster resonance energy transfer (FRET) involving ndca2− as an excitation energy donor and the bis-pyridine linkers as acceptors, with a FRET efficiency close to 100% in the case of PUM310CO

Luminescence properties of mixed-ligand MOFs containing fluorene scaffolds functionalized with isonicotinoyl arms / Delledonne, Andrea; Orlandini, Martina; Terenziani, Francesca; Mazzeo, PAOLO PIO; Bacchi, Alessia; Carlucci, Lucia; Comotti, Angiolina; Perego, Jacopo; Pelagatti, Paolo. - In: CRYSTENGCOMM. - ISSN 1466-8033. - 25:(2023), pp. 2085-2095. [10.1039/d3ce00087g]

Luminescence properties of mixed-ligand MOFs containing fluorene scaffolds functionalized with isonicotinoyl arms

Andrea Delledonne
Investigation
;
Martina Orlandini
Investigation
;
Francesca Terenziani
Supervision
;
Paolo Pio Mazzeo
Methodology
;
Alessia Bacchi
Writing – Review & Editing
;
Paolo Pelagatti
Supervision
2023-01-01

Abstract

Solvothermal reactions between three bis-pyridine-bis-amide ligands containing a fluorene scaffold bearing different substituents on the C9 position (CH2, 1; CMe2 , 2; CO, 3) with 2,6-naphthalenedicarboxylic acid (H2ndca) and Zn(NO3)2·6H2O led to the isolation of three new microporous mixed-ligand MOFs (PUM310, containing 1; PUM310Me2, containing 2; PUM310CO, containing 3). The structural characterization conducted with X-ray quality single crystals revealed parallel polycatenated frameworks of thick layers in all cases, corresponding to the topological type 5,6L18. The entangled nets contain complete and truncated Zn-paddle wheels. In the truncated paddle wheel, a pyridine of the bis-amide linker has been replaced by a DMF molecule. Solvent removal leads to framework rearrangement, as evidenced by XRPD analysis performed on desolvated PUM310, with consequent framework shrinkage as also evidenced by volumetric adsorption analyses. The three MOFs are fluorescent in the solid state. The optical spectra are indicative of a Förster resonance energy transfer (FRET) involving ndca2− as an excitation energy donor and the bis-pyridine linkers as acceptors, with a FRET efficiency close to 100% in the case of PUM310CO
2023
Luminescence properties of mixed-ligand MOFs containing fluorene scaffolds functionalized with isonicotinoyl arms / Delledonne, Andrea; Orlandini, Martina; Terenziani, Francesca; Mazzeo, PAOLO PIO; Bacchi, Alessia; Carlucci, Lucia; Comotti, Angiolina; Perego, Jacopo; Pelagatti, Paolo. - In: CRYSTENGCOMM. - ISSN 1466-8033. - 25:(2023), pp. 2085-2095. [10.1039/d3ce00087g]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2940659
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