Synthesis, structure and photocatalysis properties of two 3D Isostructural Ln (III)-MOFs based 2, 6-Pyridinedicarboxylic acid. Issue 9 (September 2018) - Zhang, Chenchen
Abstract: Two new 3D metal–organic frameworks (MOFs) named [Pr2 (PDA)3 ·3H2 O]·H2 O (1) and [Nd2 (PDA)3 ·3H2 O]·H2 O (2) [2, 6-Pyridinedicarboxylic acid (H2 PDA)] were synthesized by solvothermal method. They were characterized by elemental analyses (EA), infrared spectroscopy (FT-IR), thermogravimetric analysis (TG), photocatalysis performance and single crystal X-ray diffraction studies (XRD). The XRD analysis indicated that MOFs (1) and (2) both belong to the monoclinic system with space group P2(1)/C. The structural model were drawn by the diamond software, and the structure revel that MOFs (1) and (2) adopt three-dimensional (3D) frameworks constructed by cross-linking of one-dimensional (1D) infinite chain secondary building unit (SBU) by 2, 6-Pyridinedicarboxylic acid and hydrogen bond as linker. These frameworks feature channels inside which coordinated H2 O solvent molecules are located. Thermogravimetric analysis showed that both MOFs are thermally stable, the photocatalytic evaluation showed the materials have a good prospect in degration methylene blue. As for complex 1, the decomposition efficiency of Methylene blue was about 91.08% after 130 min and the complex 2 reach 90.45% after 160 min under the sun light.