Synthesis, characterizations and catalytic studies of a new two-dimensional metal - organic framework based on Co-carboxylate secondary building units

摘要

A metal-organic framework [Co-3(BDC)(3)(DMF)(2)(H2O)(2)] was synthesized and structurally characterized. X-ray single crystal analysis revealed that the framework contains a 2D polymeric chain through coordination of 1,4-benzenedicarboxylic acid linker ligand to cobalt centers. The polymer crystallize in monoclinic P2(1) space group with a=13.989(3) angstrom, b =9.6728(17) angstrom, c=16.707(3) angstrom, and Z=2. The polymer features a framework based on the perfect octahedral Co-O6 secondary building units. The catalytic activities of [Co-3(BDC)(3)(DMF)(2)(H2O)(2)](n) for olefins oxidation was conducted. The heterogeneous catalyst could be facilely separated from the reaction mixture, and reused three times without significant degradation in catalytic activity. Furthermore, no contribution from homogeneous catalysis of active species leaching into reaction solution was detected. (C) 2014 Elsevier Inc. All rights reserved.