TY - JOUR TI - A microporous Mg2+ MOF with cation exchange properties in a single-crystal-to-single-crystal fashion AU - Eleutheria Papazoi AU - Antigoni Douvali AU - Sofia Rapti AU - Euaggelia Skliri AU - Gerasimos S. Armatas AU - Giannis S. Papaefstathiou AU - Xin Wang AU - Zhen-Feng Huang AU - Spyridon Kaziannis AU - Constantine Kosmidis AU - Antonios G. Hatzidimitriou AU - Theodore Lazarides AU - Manolis J. Manos JO - Inorganic Chemistry Frontiers PY - 2017 VL - 4 TODO - 3 SP - 530--536 PB - Royal Society of Chemistry (RSC) SN - 2052-1553 TODO - 10.1039/c6qi00548a TODO - null TODO - We report herein a new alkaline earth metal ion organic framework [Mg-2(NH2BDC)(2)(HNO3)]center dot 9H(2)O (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 Mg-2(+) 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 CO2 vs. CH4 and negligible N-2 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. ER -