A Three-Dimensional Metal-Organic Framework Displaying Guest-Dependent Spin-Crossover Behaviour

A new three-dimensional metal-organic complex, [{Fe (NCSe) 2 } 3 (TPB) 4 ] x (guest), was prepared with the ligand of TPB (1,3,5-tris (4-pyridyl) benzene). The X-ray single crystal diffraction studied in 100 K and 173 K shown the change of bonds and angles of the framework. The guest exchange and magnetic properties indicated that the 3D framework can be responsible to the solvent guest molecules and shows guest-dependent spin-crossover behaviour.