Synthesis, Structure, and Luminescent and Magnetic Properties of Novel Lanthanide Metal−Organic Frameworks with Zeolite-like Topology

A series of microporous lanthanide metal−organic frameworks [Ln(BTC)(DMF)2·H2O, Ln = Tb (1), Dy (2), Ho (3),
Er (4), Tm (5), Yb (6); DMF = N,N‘-dimethylformamide] with 4·4·4·6·6·8 topology, which is very common in the
zeolite topologies, have been synthesized under mild conditions. The single-crystal X-ray diffraction analysis reveals
that they exhibit the same three-dimensional (3D) architecture and crystallize in monoclinic symmetry space group
C2/c. Organic and inorganic four-connected nodes link each other to form a 3D open framework. The framework
contains approximate 13 Å × 7 Å rectangle channels along the [1,1,0] and [1,−1,0] directions, respectively. The
luminescent properties of these complexes have been studied, and complex 1 shows a Tb3+ characteristic emission
in the range of 450−650 nm at room temperature. Complexes 1−5 exhibit antiferromagnetic interaction between
Ln3+ ions. The water sorption isotherm shows that about 15 water molecules per unit cell can be adsorbed into the
micropores of dehydrated complex 4.