Browsing by Author "Gomez, German E."
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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 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 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.Item Exploring physical and chemical properties in new multifunctional indium-, bismuth-, and zinc-based 1D and 2D coordination polymers(Dalton Transactions, 2017) Gomez, German E.; D'vries, Richard Fernando; Lionello, Diego Fernando; Aguirre Díaz, Lina María; Costa, Cristina; Mariana, Spinosa; Fuertes, Maria Cecilia; Pizarro, Ramon A.; Kaczmarek, Anna M.; Ellena, Javier; Rozes, Laurence; Iglesias, Marta; Deun, Rik Van; Sanchez, Clement; Monge, Angeles; Soler Illia, GaloMain group elements coordination polymers (MGE-CPs) are important compounds for the development of multifunctional materials. However, studies regarding to structural, optical, catalitic, mechanical or antibacterial properties have strikingly less reported. In this work, an exhaustive study of a set of crystalline MGE-CPs obtained from bismuth and indium metals, iminodiacetate, 1,2,4,5-benzenetetracarboxylate, and 2,2’-bipyridine as building blocks is presented. An in-deep topological analysis of the networks was carried out. Besides, nanoindentation studies were performed on two representative low dimensional compounds in order to find the relationships between their structural features and the intrinsic mechanical properties (hardness and elasticity). The solid state photoluminescence (SSPL) properties were also studied in terms of excitation, emission, lifetimes values and CIE chromaticites. Moreover, the heterogeneous catalytic activities of the compounds were evaluated in the cyanosilylation reaction using a set of carbonylic substrates under solvent-free conditions. Finally, the inhibitory effect of the Bi-CPs on the growth of microorganisms such as Escherichia coli, Salmonella enterica serovar Typhimurium and Pseudomonas aeruginosa, which are associated with relevant infectious diseases, is reported.Item Luminescence, chemical sensing and mechanical properties of crystalline materials based on lanthanide-sulfonate coordination polymers(RSC Advances, 2016) D’Vries, Richard F.; Gomez, German E.; Lionello, Diego F.; Fuertes, M. Cecilia; Soler Illia, Galo; Ellena, JavierLanthanide-coordination polymers (Ln-CPs) constitute relevant compounds for the design of multifunctional materials. Nevertheless, studies devoted to understand relationships of combined structural-optical-mechanical properties are scarcely reported. In this work, an exhaustive study of a series of CPs obtained from lanthanide metals, 3-hydroxinaphthalene-2,7-disulfonate(3-OHNDS) and 1,10-phenanthroline (phen) as ligands is presented. Two crystalline phases were identified with general formula [Eu(3-OHNDS)(Phen)(H2O)2]•3H2O (Phase 1-Eu), and [Ln2(3-OHNDS)2(Phen)2(H2O)]•3H2O (Phase 2-Ln), where Ln3+ = Tb, Dy, Ho, Er and Yb. Both phases were characterized by powder and single crystal X-ray diffraction, vibrational and thermal analysis and scanning electron microscopy. Moreover, nanoindentation analysis was performed in order to find relationships between structural features and the mechanical properties of the crystalline materials. The photoluminescence (PL) properties of the reported phases were also explored, involving excitation-emission experiments and quantification of color emission. Finally, one compound was selected as chemical sensor model, exhibiting different optical behaviour in the prescence of aromatic molecules, principally towards naphtalene molecules. These results make these compounds promising materials for the elaboration of selective chemical sensors.