Abstract
A carbazole-based linker 9-(carboxymethyl)carbazole-3,6-dicarboxylic acid (H3cbzac) was synthesized for the first time. Its structure was confirmed via 1H NMR and Powder X-Ray Difraction (PXRD) methods. A novel calcium-based 2D MOF Ca(H2cbzac)2(DMF)2 (ZIOC-10) was synthesized via a solvothermal procedure. It was found that the obtained framework undergoes several structural changes upon heating, which lead to the formation of a new framework Ca(H2cbzac)2 (ZIOC-10a). Noteworthy, ZIOC-10 transforms into the permanent porous (524 m2/g) 3D framework, which can absorb methane, ethane, propane, and carbon dioxide at room temperature.
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