From Metalloligand to Interpenetrating Channels: Synthesis, Characterization, and Properties of a 2p−3d−4f Heterometallic Coordination Polymer {[Na₅Cu₈Sm₄(NTA)₈(ClO₄)₈(H₂O)₂₂]·ClO₄·8H₂O}_n

A novel 3D heteropolymetallic coordination polymer, {[Na₅Cu₈Sm₄(NTA)₈(ClO₄)₈(H₂O)₂₂]·ClO₄·8H₂O}_n (H₃NTA = nitrilotriacetic acid), based on the metalloligand [Cu(NTA)]⁻, has been prepared and characterized by X-ray crystal diffraction. The single-crystal structure shows that the complex forms a 3D framework with interpenetrating 1D channels along the a and b axes, respectively. These channels construct 2D “tube net” layers in the ab plane. The temperature-dependent magnetic properties have been studied and showed the presence of antiferromagnetic couplings between Cu^II ions. The investigation of ion exchange reveals that the uncoordinated perchlorate anions that filled in the channels can be exchanged by anions of tetrafluoroborate.