Browsing by Author "Barja, Beatriz C."
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Item 1D lanthanide coordination polymers based on lanthanides and 4′-hydroxi-4-biphenylcarboxylic acid: Synthesis, structures and luminescence properties(Journal of Solid State Chemistry, 2019) D'Vries, Richard F.; Gomez, German E.; Mondragon, Lina Paola; Onna, Diego; Barja, Beatriz C.; Soler Illia, Galo; Ellena, JavierA new family of 1D coordination polymers with formula [Ln(4-OHBBA) 3 (H 2 O) 2 ] and a new 3D supramolecular network topology was obtained. Photoluminescence and sensing tests of doped compounds were performed. Synopsis A family of coordination polymers with formula [Ln(4-OHBBA) 3 (H 2 O) 2 ] 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 (H 2 O) 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.Item 1D lanthanide coordination polymers based on lanthanides and 4′-hydroxi-4-biphenylcarboxylic acid: Synthesis, structures and luminescence properties(Academic Press Inc., 2019-03-29) D'Vries, Richard F.; Gomez, German E.; Mondragon, Lina Paola; Onna, Diego; Barja, Beatriz C.; Soler-Illia, Galo J.A.A.; Ellena, JavierSynopsis: A family of coordination polymers with formula [Ln(4-OHBBA) 3 (H 2 O) 2 ] 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 (H 2 O) 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 centresItem Chain-like uranyl-coordination polymer as a bright green light emitter for sensing and sunlight driven photocatalysis(Royal Society of Chemistry, 2020-07-02) Gomez, Germán E.; Onna, Diego; D'Vries, Richard Fernando; Barja, Beatriz C.; Alcides Ellena, Javier; Narda, Griselda Edith; Soler-Illia, G. J.A.A.A new uranyl-coordination polymer (UCP) has been solvothermally synthesized employing succinic acid and 1,10-phenanthroline (phen) as ligands. The obtained compound with the formula [(UO2)2(phen)(succ)0.5(OH)(O)4(μ3-O)(H2O)]·H2O (UNSL-1) is classified as 1D chains showing I0O1 connectivity. Also, the asymmetric unit is composed of two hepta-coordinated uranyl centers: U1 is surrounded by five oxygen atoms from succinate, while U2 is surrounded by two nitrogen atoms from phen and three oxygen atoms from succinate ([U1O7] and [U2N2O5]). The secondary-building unit (SBU) is composed of a sharing edge tetrameric cluster linked with a succinate ligand in the [−1 0 1] direction. Besides, the chains are reinforced by π–π stacking interactions between the aromatic rings of the phen molecules to conform a 2D supramolecular arrangement. Moreover, photoluminescence experiments show strong green emission consistent with uranyl crystalline materials. Photophysical characterization was completed via low-temperature measurements (77 K) and recording the decay emission for calculating the lifetime (τobs) value. Regarding its multifunctional properties, a cation-sensing performance was achieved showing selective quenching toward iron ions in aqueous media. Finally, UNSL-1 was tested as an efficient water photocatalyst for dye degradation under simulated sunlight irradiation, exhibiting promising results for organic-pollutant water remediation.Item Data of synthesis, characterization and luminescence measurements in 1D lanthanide coordination polymers based on lanthanides(Elsevier Inc., 2019-10-22) D'Vries, Richard F.; Gomez, German E.; Mondragon, Lina Paola; Onna, Diego; Barja, Beatriz C.; Soler-Illia, Galo J.A.A.; Ellena, JavierIn this work are presented all the conditions of synthesis explored to obtain a new family of compound with formula [Ln(4-OHBBA)3(H2O)2] (Ln = La, Pr). Powder X ray diffraction was used to identify the different phases obtained in the synthetic study. FT-IR spectroscopy and TG analysis for La and Pr pure phases are also reported. Optical properties of optically active CPs materials, solid state photoluminescence properties of La, Pr, La-(5%Eu) and La-(5%Tb) compounds were explored. We report the absorption, excitation and emission spectrum of the 4′-hydroxi-4-biphenylcarboxylic acid and a comparative description of the radiative (and no-radiative) processes in solid state in Ln-(4-OHBBA) and Ln-BPDC compounds. Finally, a principal component analysis was conducted in order to take in account both signal contributions from the sensor (LCE at 384 nm and the europium emission at 610 nm) and for classifying the type of analytes used to test the sensing response of the materials.