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oai:recercat.cat:2445/1752722025-12-04T21:44:50Zcom_2072_1057col_2072_478917col_2072_478933

urn:hdl:2445/175272 Structural Characterization, Magnetic and Luminescent Properties of Praseodymium(III)‐4,4,4‐Trifluoro‐1‐(2‐Naphthyl)Butane‐1,3‐Dionato(1‐)Complexes Mautner, Franz A. Bierbaumer, Florian Fischer, Roland C. Vicente Castillo, Ramón Tubau Ribot, Ànnia Ferran, Arnau Massoud, Salah S. Luminescència Magnetisme Estructura cristal·lina (Sòlids) Luminescence Magnetism Layer structure (Solids) Four new Pr(III) mononuclear complexes of formula [Pr(ntfa)3(MeOH)2] (1), [Pr(ntfa)3(bipy)2] (2), [Pr(ntfa)3(4,4′-Mt2bipy)] (3) and [Pr(ntfa)3(5,5′-Me2bipy)] (4), where ntfa = 4,4,4-trifuoro-1-(naphthalen-2-yl)butane-1,3-dionato(1-), 5,5′-Me2bipy = 5,5′-dimethyl-2,2′-dipyridine, 4,4′-Mt2bipy = 4,4′-dimethoxy-2,2′-dipyridine, have been synthesized and structurally characterized. The complexes display the coordination numbers 8 for 1, 3 and 4, and 10 for 2. Magnetic measurements of complexes 1-4 were consistent with a magnetically uncoupled Pr3+ ion in the 3H4 ground state. The solid state luminescence studies showed that the ancillary chelating bipyridyl ligands in the 2-4 complexes greatly enhance the luminescence emission in the visible and NIR regions through efficient energy transfer from the ligands to the central Pr3+ ion; behaving as "antenna" ligands. 2021-03-17T15:58:19Z 2021-03-17T15:58:19Z 2021-02-11 2021-03-17T15:58:20Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Reproducció del document publicat a: https://doi.org/10.3390/cryst11020179 Crystals, 2021, vol. 11, num. 2 https://doi.org/10.3390/cryst11020179 cc-by (c) Mautner, Franz A. et al., 2021 http://creativecommons.org/licenses/by/3.0/es info:eu-repo/semantics/openAccess MDPI Articles publicats en revistes (Química Inorgànica i Orgànica)