Employing La2- (La = Eu, Tb, Pr) or Co3-based molecule building blocks to construct 3,8-connected nets:: Hydrothermal synthesis, structure, luminescence, and magnetic properties

In this work, we report two 3,8-connected nets. The first one is polymers 1-3, La(pydc)(L)(0.5)(mu-H2O) (pydc = pyridine-2,5-carboxylate, H2L = adipic acid), which are isostructural and described by the (4.5.6)(2)(4(2).5(6).6(16).7(2).8(2)) topology notation, and the other one is polymer 4, Co-3(1,4-BDC)(1,2-BDC)(2)(mu(2)-H2O)(2)(mu-H2O)(2) (1,4-BDC = 1,4-benzenedicarboxylate, 1,2-BDC = 1,2-benzened icarbox yl ate), characterized by the tfz-d net with the (4(3))(2)(4(6).6(18).8(4)) topology symbol. Comparing with the reported 3,8-connected nets, the present examples show several unique properties: (a) the La-2- and CO3-based M1313s are unprecedented; (b) two different multicarboxylate ligands are employed to construct such nets; (c) the 3D matrix of polyrners 1-3 is unique and unprecedented.