Synthesis and Characterization of Manganese(II)-Phenanthroline Complex Functionalized MCM-41

The preparation of manganese (Ⅱ) -phenanthroline complex functionalized MCM-41was described. The modification of the internal pore surface of mesoporous MCM-41 with 3-aminopropyl or 3- methacryloyloxypropyl and yielded two different functional groups by using3-aminopropyltriethoxysilane and (3- methacryloyloxypropyl) trimethoxysilane as the precursors.Manganese(II) phenanthroline complex was grafted onto the functional MCM-41 via the coordination of the metal ion with the functional group. The metal ion complex functionalized mesoporousmaterials were characterized by XRD, FTIR, N2 adsorption/desorption at 77K, solid state diffusereflectance UV-VIS spectroscopy as well as electron spin resonance (ESR) at room temperature.After the functionalization, the vibrations such as υC=C, δCH2 from the organic ligands or Mn(II)complex can be observed clearly. BET surface area, pore volume and most probably diameter decreased correspondingly according to the data of N2 sorption at 77K. In UV-VIS spectra, theabsorption at short wavelength was strengthened because of the introduced organic ligands. Andthe results of ESR suggested that Mn(II) coordination in complexes didn't change remarkably.