Controlled Synthesis of Porous Coordination‐Polymer Microcrystals with Definite Morphologies and Sizes under Mild Conditions |
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| Authors: | Qing Liu Ji‐Min Yang Dr Li‐Na Jin Prof Dr Wei‐Yin Sun |
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| Institution: | State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute, School of Chemistry and Chemical Engineering, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing 210093 (P.R. China), Fax: (+86)?25‐83314502 |
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| Abstract: | Herein, we report a facile and convenient method for the synthesis of the porous coordination polymer MOF‐14 Cu3(BTB)2] (H3BTB=4,4′,4′′‐benzene‐1,3,5‐triyl‐tribenzoic acid) as microcrystals with definite shapes and crystal facets controlled by the reaction medium at room temperature. The amount of sodium acetate added to the reaction system plays a crucial role in the shape evolution of MOF‐14 from rhombic dodecahedrons to truncated rhombic dodecahedrons and cubes with truncated edges and then to cubes. The addition of a base could accelerate the formation rate of crystal growth and increase the supersaturation of crystal growth, thus resulting in the formation of MOF‐14 cube crystals with high‐energy crystal facets. The morphological evolution was also observed for HKUST‐1 Cu3(BTC)2] (H3BTC=1,3,5‐benzenetricarbocylic acid) from octahedrons to cubes, thus verifying the probable mechanism of the morphological transformation. The gas‐adsorption properties of MOF‐14 with different shapes were studied and reveal that the porous coordination‐polymer microcrystals display excellent and morphology‐dependent sorption properties. |
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| Keywords: | crystal growth metal– organic frameworks nanostructures shape evolution sorption property |
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