Two Homochiral Bimetallic Metal–Organic Frameworks Composed of a Paramagnetic Metalloligand and Chiral Camphorates: Multifunctional Properties of Sorption, Magnetism, and Enantioselective Separation

Two porous metal–organic frameworks [Co(Tt) 2 ][Cu 4 (D-cam) 4 ]·5H 2 O·DMF ( 1; Tt = tris(triazolyl)borate, D-H 2 cam = d -(+)-camphoric acid or (1 R,3 S )-1,2,2-trimethyl-1,3-cyclopentanedicarboxylic acid) and [Co(Tt) 2 ][Cu 4 (L-cam) 4 ]·5H 2 O·2DMF ( 2; L-H 2 cam = l -(−)-camphoric acid or (1 S,3 R )-1,2,2-trimethyl-1,3-cyclopentanedicarboxylic acid) were prepared by mixing Cu 2+, Co(Tt), and camphoric acid under solvothermal conditions. The structures of 1 and 2 reveal that the two-dimensional layers composed of chiral ligands and Cu-Cu paddlewheel units are connected through the metalloligands to form three-dimensional networks. It is noted that these solids show multifunctional properties such as gas adsorption onto the pores of the frameworks, antiferromagnetic coupling between spin carriers, and a small enantioselective separation of racemic alcohols.