Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Implementation of the Hard‐Soft Acid‐Base Principle for the Direct Synthesis of Bimetallic Zirconium‐Nickel and Hafnium‐Nickel Metal‐Organic Frameworks with a Polar Pore Environment
Δημιουργός/Συγγραφέας:	Trikalitis, Pantelis Froudas, Konstantinos G. Giasemi K Angeli
Ημερομηνία:	2025
Γλώσσα:	Αγγλικά
ISSN:	0947-6539 1521-3765
DOI:	10.1002/chem.202501049
Περίληψη:	An important direction in MOFs is the development of materials with well-defined and ordered heterogeneity towards novel functionalities and control of important properties at the atomic scale. A great approach is the designed synthesis of mixed metal MOFs (M’MOFs) made of different building units, based on distinct metal cations. However, their in-situ formation and co-assembly into an extended crystalline framework present great challenges due to the different kinetic and thermodynamic parameters. We report the successful synthesis of two isostructural, bimetallic Zr-Ni and Hf-Ni M’MOFs following the hard and soft acid and base (HSAB) principle. Single crystal X-ray diffraction analysis revealed the formation of a 3D structure that features an in-situ formed [Ni(HPyC)4Cl2]4- 4-c non-planar metallo-ligand, that bridges 8-c Zr(Hf)6-clusters. The resulting (4, 8)-c scu type framework shows polygonal 1D channels, with a largest pore diameter of approximately 9 Å, decorated by Cl- anions. This polar pore environment was found fully accessible and both materials were investigated for Xe/Kr and CO2/CH4 separation. The results are very promising showing that the IAST selectivity calculated for a 20:80 Xe/Kr molar mixture is 8.2 and 7.1 at 298K for the Zr_Ni-scu-MOF-1 and Hf_Ni-scu-MOF-1, respectively, which is comparable to some of the best performing materials.
Τίτλος πηγής δημοσίευσης:	Chemistry – A European Journal
Θεματική Κατηγορία:	[EL] Χημεία[EN] Chemistry [EL] Ανόργανη χημεία[EN] Inorganic chemistry [EL] Κρυσταλλογραφία[EN] Crystallography
Λέξεις-Κλειδιά:	HSAB principle heterometallic Metal-organic frameworks (MOFs) polar surface Xe/Kr separation
Κάτοχος πνευματικών δικαιωμάτων:	© 2025 Wiley-VCH GmbH
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://doi.org/10.1002/chem.202501049op
Σημειώσεις:	Research Article. Chem. Eur. J. 2025, e202501049
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο