Synthesis,crystal structures,and properties of lanthanide metal-organic frameworks based on 2,5-dibromoterephthalic acid ligand
The present report deals with the synthesis of the two MOFs of respective formula {[Nd2(L)3(DMF)2(H2O)2]·2DMF}n(1)and {[Gd2(L)3(DMF)2(H2O)2]·2DMF}n(2)were synthesized by solvothermal method using 2,5-dibromo-terephthalic acid(H2L)as a ligand and reacting with neodymium nitrate hexahydrate and gadolinium nitrate hexahy-drate,respectively.The structures of both of them were elucidated by single-crystal X-ray diffraction and powder X-ray diffraction to demonstrate that complexes 1 and 2 crystallize in a similar space group P1 as a triclinic system with high crystal purity.Meanwhile,the complexes were characterized by elemental analysis,IR spectroscopy,UV-Vis absorption spectroscopy,fluorescence,and thermal analysis.Single-crystal X-ray diffraction analysis demon-strates the complexes are connected to the ligand with rare earth ions as metal nodes,forming an infinitely extended 3D network structure.CCDC:2054012,1;2054067,2.
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