Synthesis, structural characterization and application of a 2D coordination polymer of Mn-terephthalate as a heterogeneous catalyst for olefin oxidation

A metal–organic coordination polymer of [Mn3(1,4-benzenedicarboxylate)3(DMF)4] ([Mn3(BDC)3(DMF)4]n) was synthesized and characterized by IR spectra, elemental analysis (CHN), thermal gravimetric analysis (TGA) and single crystal X-ray diffraction analysis. The structure of [Mn3(BDC)3(DMF)4]n is a 2D-periodic framework based on Mn(II)-terephthalate secondary building units (SBUs). The catalytic oxidation of various olefins was effectively carried out with [Mn3(BDC)3(DMF)4]n. Moreover, the influence of key reaction parameters, including the solvents, reaction temperatures and nature of oxidant were studied. The optimized conditions were achieved by TBHP as the efficient oxidant in 1,2-dichloroethane solvent at 75 °C. Finally, this catalyst was used for four cycles efficiently without a significant loss of yield.

Graphical abstractA metal–organic coordination polymer of [Mn3(BDC)3(DMF)4] was synthesized by the hydrothermal method. This 2D-periodic framework is constructed from infinite Mn–O–C channels and crystallizes in the triclinic P1¯ space group, and is based on Mn(II)-terephthalate secondary building units. The catalytic oxidation of various olefins was effectively carried out with [Mn3(BDC)3(DMF)4]n, using TBHP as an oxidant.Figure optionsDownload full-size imageDownload as PowerPoint slide