New Composites CP@AC Based on Lanthanide Succinates

Composites derived from coordination polymers have been gathering great attention due to their singular properties and applications, especially catalysis and adsorption. In this work, seven new composites based on activated carbon (AC) and lanthanide-succinates (LnSuc; Ln = Pr, Nd, Sm, Gd, Dy, Er and Tm, and Suc = succinate) 3D-coordination polymers were obtained using hydrothermal reactions. Coordination polymers in LnSuc@AC composites (Ln = Pr, Nd, Sm, Gd) crystallize in monoclinic system and C2/c space group. However, the LnSuc in composites with Dy, Er and Tm have different crystal structures, due to the influence of the carbon matrix in the reaction. The systems were also characterized by Fourier transform infrared (FTIR) and thermogravimetric (TGA) analysis, and the results are in agreement with the X-ray powder diffraction (XRPD) data. The scanning electron microscopy (SEM) images confirm the crystallization of the compounds inside the pores of the carbon material. Photophysical properties of the NdSuc@AC and DySuc@AC were also investigated.