Two-step warming solvothermal syntheses, luminescence and slow magnetic relaxation of isostructural dense LnMOFs based on nanoscale 3-connected linkers

Two isostructural dense lanthanide metal-organic frameworks derived from an extended ligand 1,3,5-tris (4-carboxyphenyl) benzene (H3BTB), [Ln(BTB)H2O](n) (Ln = Eu, 1; Ln = Dy, 2), which are constructed via a cross-like folding assembly strategy, were yielded by 'two-step warming solvothermal synthesis'. Complex 1 shows luminescence while complex 2 exhibits field-induced two-step magnetic relaxation.