1D lanthanide coordination polymers based on lanthanides and 4′-hydroxi-4-biphenylcarboxylic acid: Synthesis, structures and luminescence properties

Synopsis: A family of coordination polymers with formula [Ln(4-OHBBA)(3)(H2O)(2)1] with a new 3D supramolecular network topology was obtained. Luminescence properties were studied. Resume: A new family of 1D coordination polymers (CPs) based on 4'-hydroxi-4-biphenylcarboxylic acid (4-OHBBA) linker and lanthanide metals were obtained by hydrothermal synthesis. The compounds were fully characterized and present the general formula [Ln(4-OHBBA)(3)(H2O)(2)] (where Ln = La, Pr), crystallizing in the monoclinic P2(1)/c space group. The CPs are formed by "fish bone-like" chains along [010] direction. Also, the topological analysis revels a 3D supramolecular structure with a 7-nodal 3,3,3,4,4,4,4-connected network and the (6.8(2))(2)(6(2).8)(2)(6(3).8(2).10)(2)(6(3))(4)(6(5).8)(2)(8(6)) point symbol. The luminescence and chemical sensing tests of the europium doped compound was performed, finding that the Eu, Tb and Dy -doped samples exhibited dual emissions from the 4-OHBBA ligand and the lanthanide centres.