Hydrothermal synthesis, crystal structure, and luminescence of lanthanide(III) coordination polymers with tetrafluorosuccinate and 1,10-phenanthroline

Three new coordination polymers [Nd2(TFSA)3(phen)2]n (1) and {[Ln(TFSA)(phen)(H2O)4]·0.5(TFSA)·2(phen) H2O}n (Ln = Sm, 2 and Dy, 3; TFSA = tetrafluorosuccinate; phen = 1,10-phenanthroline) were synthesized and characterized using X-ray structure analyses and luminescence spectroscopy. The 1 has a 2-D network structure through TFSA ligands via bridging/chelating-bridging pentadentate and bridging/bridging tetradentate coordination modes. The 2 and 3 have novel 1-D chain structures, in which adjacent Ln(III) ions are linked though the single μ2-bridging TFSA ligands as linkages. The emission spectrum in the NIR of 1 corresponds to the 4F3/2 → 4I9/2, 11/2, 13/2 transitions of Nd(III) ion. The emission spectra of 2 and 3 indicate the typical luminescence characteristics of the Sm(III) and Dy(III) ions, respectively.