Synthesis of a 3-D porous Tb-MOF: organic dye adsorption
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A 3-D lanthanide metal–organic framework, [Tb<sub>2</sub>(L)<sub>1.5</sub>(DMF)<sub>2</sub>]·2DMF (<b>1</b>) (L = 14-diylbis(acylamino-21-diyl))-diisophthalic acid), has been synthesized under solvothermal conditions. <b>1</b> was characterized by X-ray single-crystal analysis and powder X-ray diffraction. The 3-D framework of <b>1</b> is constructed by 2-D channels embedded in a plane. Network analysis reveals that <b>1</b> is a (4,5,6,6)-connected net with stoichiometry (4-c)<sub>2</sub>(5-c)<sub>2</sub>(6-c)<sub>3</sub>. As expected, this terbium(III) metal–organic framework exhibits good properties for adsorbing organic dye molecules due to its NH- group. It shows good adsorption selectivity for rhodamine B (RB) rather than methyl orange (MO) and methylene blue (MB) molecules.



