Abstract
Using formate, three heterobimetallic CuIILnIII coordination polymers (CPs), [(Cu(Cl)(valen)Ln(NO3)(CH3OH)(μ-HCOO)]n [H2valen = 1,2-ethanediylbis(2-iminomethylene-6-methoxy-phenol); Ln = Tb(1), Tm(2), Y(3)], were synthesized and characterized by IR spectroscopy, elemental analysis and single-crystal X-ray diffraction analyses. In these complexes, Cu ions are five-coordinate with an elongated square pyramidal (C4v) geometry, while the Ln (Tb, Tm and Y) ions are nine-coordinate with a muffin (Cs) geometry. In 1-3, the formate bridging ligands adopt a syn-anti coordination mode and cross-link the [(Cu(Cl)(valen)Ln(NO3)(CH3OH)]+ units into infinite zigzag chains, which are further connected by C-H···O and the C-H···Cl interactions to form 3 D supramolecular structures. In addition, the thermal stabilities of 1-3 were studied. This article offers a promising method for the design of 3d-4f molecular architectures with formate.
Graphical Abstract
![](/cms/asset/5655196f-a325-44b2-99ce-9af561de1b9d/gcoo_a_1919653_uf0001_c.jpg)
Disclosure statement
No potential conflict of interest was reported by the authors.