A microporous Mg2+ MOF with cation exchange properties in a single-crystal-to-single-crystal fashion

Eleutheria Papazoi; Antigoni Douvali; Sofia Rapti; Euaggelia Skliri; Gerasimos S. Armatas; Giannis S. Papaefstathiou; Xin Wang; Zhen-Feng Huang; Spyridon Kaziannis; Constantine Kosmidis; Antonios G. Hatzidimitriou; Theodore Lazarides; Manolis J. Manos

doi:10.1039/C6QI00548A

A microporous Mg²⁺ MOF with cation exchange properties in a single-crystal-to-single-crystal fashion†

Eleutheria Papazoi,^a Antigoni Douvali,^a Sofia Rapti,^a Euaggelia Skliri,^b Gerasimos S. Armatas,

^b Giannis S. Papaefstathiou,

^c Xin Wang,

^d Zhen-Feng Huang,^d Spyridon Kaziannis,^e Constantine Kosmidis,^e Antonios G. Hatzidimitriou,^f Theodore Lazarides*^f and Manolis J. Manos*^a

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* Corresponding authors

^a Department of Chemistry, University of Ioannina, Ioannina, Greece
E-mail: emanos@cc.uoi.gr

^b Department of Materials Science and Technology, University of Crete, 71003 Heraklion, Greece

^c Laboratory of Inorganic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, Zografou 157 71, Greece

^d School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore

^e Department of Physics, University of Ioannina, Ioannina, Greece

^f Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
E-mail: tlazarides@chem.auth.gr

Abstract

We report herein a new alkaline earth metal ion organic framework [Mg₂(NH₂BDC)₂(HNO₃)]·9H₂O (AEMOF-7), which shows a 3-D microporous structure with several unusual features, such as the rare trigonal prismatic coordination geometry of one of the crystallographically unique Mg²⁺ centers and the existence of a bridging HNO₃ ligand. The H⁺ ions of the HNO₃ ligand are dissociable as demonstrated via proton conductivity measurements. AEMOF-7 displays relatively high selectivity for CO₂vs. CH₄ and negligible N₂ uptake. Interestingly, this compound was found to be capable of single-crystal-to-single-crystal (SCSC) exchange of Mg²⁺ by Cu²⁺ ions, which was observed for the first time in a MOF material. AEMOF-7 is also luminescent and its photophysical properties were investigated via solid state UV-Vis, steady-state and time-resolved luminescence studies.

This article is part of the themed collection: In honour of Mercouri G. Kanatzidis for his contributions to Inorganic Chemistry for over 30 years

Inorganic Chemistry Frontiers

A microporous Mg²⁺ MOF with cation exchange properties in a single-crystal-to-single-crystal fashion†

Abstract

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