The Uncommon Channel Based Ln MOFs for Highly Selective Fe3+ Detection and Superior Rhodamine B Adsorption.
Two new isostructural 3D lanthanide organic frameworks [H2 N(Me)2 [Ln3 (OH)(bpt)3 (H2 O)3 (DMF)2 (H2 O)4 (1 Ln; Ln=Sm and Eu) with a 1D channel (25 A) have been successfully assembled from the rare trinuclear [Ln3 (OH)(COO)9 clusters and biphenyl 3,4',5 tricarboxylic acid (H3 bpt) and exhibit high stability towards water in the pH range 3 10. MOF 1 Eu is a promising luminescent probe for sensing Fe3+ in aqueous solution and is also selective towards rhodamine B (RhB) with a superior adsorption capacity of 735 mg g 1 which is the highest among the reported Ln MOFs for RhB removal so far. Periodic DFT calculations further confirmed the selective adsorption of rhodamine B over other dyes.
Chemistry