摘要
We report herein a new alkaline earth metal ion organic framework[Mg_(2)(NH_(2)BDC)_(2)(HNO_(3))]·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 HNO_(3)ligand.The H^(+)ions of the HNO_(3)ligand are dissociable as demonstrated via proton conductivity measurements.AEMOF-7 displays relatively high selectivity for CO_(2)vs.CH_(4)and negligible N_(2)uptake.Interestingly,this compound was found to be capable of single-crystal-to-single-crystal(SCSC)exchange of Mg^(2+)by Cu^(2+)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.
