Browsing by Author "68175d1e-a04d-414b-af03-e662117f4ce2"
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1D Magnetic Interactions in CuII Oxovanadium Phosphates (VPO), Magnetic Susceptibility, DFT, and Single-Crystal EPR
Venegas Yazigi, Diego; Spodine Spiridonova, Evgenia; Saldias, Marianela; Vega, Andrés; Paredes García, Verónica; Calvo, Rafael; Santana, Ricardo Costa de (American Chemical Society, 2015)We report the crystal face indexing and molecular spatial orientation, magnetic properties, electron paramagnetic resonance (EPR) spectra, and density functional theory (DFT) calculations of two previously reported oxovanadium ... -
2-(2-pyridylamino)pyridinium tetrachloridozincate(II)
Venegas Yazigi, Diego; Castillo, Carolina; Paredes García, Verónica; Vega, Andrés; Spodine Spiridonova, Evgenia (BLACKWELL PUBLISHING, 2008-06)The structure of the title compound, (C10H10N3)(2)[ZnCl4], is composed of C10H9N3H+ ( DPAH(+)) cations and [ ZnCl4](2-) anions. The two pyridyl rings of DPAH+ are approximately coplanar, with a dihedral angle of 7.2 ( ... -
A reusable CuII based metal-organic framework as a catalyst for the oxidation of olefins
Cancino, Patricio; Paredes García, Verónica; Aguirre, Pedro; Spodine Spiridonova, Evgenia (Royal Society of Chemistry, 2014)The metal-organic framework [Cu2(bipy)2(btec)] ∞ was used as a heterogeneous catalyst in the liquid phase oxidation of styrene and cyclohexene with tert-butylhydroperoxide (TBHP) as the oxidant either in water-dichloroethane ... -
Catena-(bis((1,10-phenanthroline-N,N′)-copper(II)) hydroxy-bis(phosphato)-tris(dioxo-vanadium(v))): a polymorphic phase driven by disorder
Silva Galaz, Cristian; Saldías, Marianela; Freire, Eleonora; Baggio, Ricardo; Le Fur, E.; Paredes García, Verónica; Spodine Spiridonova, Evgenia; Venegas Yazigi, Diego (2013)In the present paper a copper(II) phosphovanadate is presented and formulated as [Cu-6(phen)(6)((VO2)-O-v)(6) (PO4)(6)((VO2HO)-O-v)(3)] (1a). This compound was obtained by hydrothermal synthesis and crystallizes in the ... -
Crystal lattice effect on the quenching of the intracluster magnetic interaction in [V12B18O60H6] 10- polyoxometalate
Hermosilla-Ibáñez, Patricio; Cañon Mancisidor, Walter; Costamagna, Juan; Vega, Andrés; Paredes García, Verónica; Garland, María Teresa; Le Fur, Eric; Cador, Olivier; Spodine Spiridonova, Evgenia; Venegas Yazigi, Diego (Royal Society of Chemistry, 2014)In the present work, the synthesis and structural characterization of four new polyoxovanadoborate (BVO) frameworks based on the [V12B 18O60H6]10- polyanion are reported: (NH4)8(1,3-diapH2)[V12B 18O60H6]·5H2O (1), K ... -
Crystal structure and magnetic properties of a new chiral manganese(II) three-dimensional framework: Na3[Mn3(HCOO)9]
Paredes García, Verónica; Vega, Andrés; Novak, Miguel A.; Vaz, Maria G.F.; Souza, Denise A.; Venegas Yazigi, Diego; Spodine Spiridonova, Evgenia (2009)A structural and magnetic characterization of a trinuclear chiral Mn(ll) formate three-dimensional framework exhibiting a triangular arrangement is presented. Compound Na3[Mn3(HCOO)9] was obtained by solvothermal synthesis ... -
Cu(H(2)btec)(bipy)](infinity): a novel metal organic framework (MOF) as heterogeneous catalyst for the oxidation of olefins
Brown, Kareen; Zolezzi Carvallo, Santiago; Aguirre, Pedro; Venegas Yazigi, Diego; Paredes García, Verónica; Baggio, Ricardo; Novak, Miguel; Spodine Spiridonova, Evgenia (Royal Society of Chemistry, 2009)A new extended metal-organic framework [Cu(H(2)btec)(bipy)](infinity) (1) (H(4)btec=1,2,4,5-benzenetetracarboxylic acid; bipy= 2,2'-bipyridine) has been hydrothermally synthesized. Violet crystals are formed in a monoclinic ... -
Cu(II)–Gd(III) 2D-coordination polymer based on two different organic linkers
Cruz, Carlos; Spodine Spiridonova, Evgenia; Venegas Yazigi, Diego; Paredes García, Verónica (Elsevier, 2017)A new CuII–GdIII heterometallic coordination polymer was obtained by a two-step synthesis, using the molecular complex [Cu(H2IDC)2(2,20-bipy)] 2H2O (1) as metalloligand and oxalate as auxiliary ligand (H3IDC = ... -
Effect of the counter-anion on the structural and magnetic properties of a copper(II) complex with 2-[(bis(2-pyridylmethyl)amino)methyl]-4-methyl-6-(methylthio)phenol
Manzur Saffie, Jorge; Mora, H.; Paredes García, Verónica; Vega, Andrés; Novak, M. A. (2013)A new 2-[(bis(2-pyridylmethyl)amino)methyl]-4-methyl-6-(methylthio)phenol copper(II) perchlorate, complex, [Cu-2(mu-SL)(2)](ClO4)(2) (1), was synthesized and magnetically and structurally characterized. The complex consists ... -
Electronic and magnetic properties of iron (III) dinuclear complexes with carboxylate bridges
Paredes García, Verónica; Latorre, Ramón; Spodine Spiridonova, Evgenia (2004)A series of dinuclear iron (III) complexes with carboxylate bridges, of the type [Fe2L2(H20)4](NO 3)2(H2O)m (m=1-3), where L=Schiff base derived from L-α-amino acids and salicylaldehyde have been prepared and characterised ... -
Electronic properties of mixed valence iron(II,III) dinuclear complexes with carboxylate bridges
Paredes García, Verónica; Venegas Yazigi, Diego; Latorre, Ramón; Spodine Spiridonova, Evgenia (PERGAMON-ELSEVIER SCIENCE LTD, 2006-06-19)Mixed valence dinuclear iron(II,III) complexes of the type [Fe2L2(H2O)(4)](NO3)(H2O)(3), where L is the dianion of a Schiff base ligand derived from alpha-amino acids (glycine and L-isolecine) and 5-bromosalicylaldehyde, ... -
First copper(ii) phase M′0.2Mn0.8PS3·0.25H2O and analogous M′ = CoII, NiII and ZnII materials obtained by microwave assisted synthesis
Fuentealba, Pablo; Cortés, Catalina; Audebrand, Nathalie; Le Fur, Eric; Paredes García, Verónica; Venegas Yazigi, Diego; Manzur Saffie, Jorge; Spodine Spiridonova, Evgenia (Royal Society of Chemistry, 2015)M′0.2Mn 0.8PS3·0.25H2O materials are obtained by a mild microwave assisted reaction (M′ = CoII, NiII, CuII, ZnII), which permitted us to obtain the first copper(ii) bimetallic phase. All these materials have a lower energy ... -
Generation of a Non-Transgenic Genetically Improved Yeast Strain for Wine Production from Nitrogen-Deficient Musts
Kessi Pérez, Eduardo; Molinet, Jennifer; García, Verónica; Aguilera, Omayra; Cepeda, Fernanda; López, María Eugenia; Sari, Santiago; Cuello, Raúl; Ciklic, Iván; Rojo, María Cecilia; Combina, Mariana; Araneda Tolosa, Cristian; Martínez, Claudio (MDPI, 2020)The yeastSaccharomyces cerevisiaeis the main species responsible for the process that involves the transformation of grape must into wine, with the initial nitrogen in the grape must being vital for it. One of the main ... -
Generation of a non-transgenic genetically improved yeast strain for wine production from nitrogen-deficient musts
Kessi Pérez, Eduardo I.; Molinet, Jennifer; Paredes García, Verónica; Aguilera, Omayra; Cepeda Álvarez, Fernanda; López Dinamarca, María Eugenia; Sari, Santiago; Cuello, Raúl; Ciklic, Iván; Rojo, María Cecilia; Combina, Mariana; Araneda Tolosa, Cristian; Martínez, Claudio (MDPI, 2020)The yeastSaccharomyces cerevisiaeis the main species responsible for the process that involves the transformation of grape must into wine, with the initial nitrogen in the grape must being vital for it. One of the main ... -
Influence of the lanthanide(III) ion in {[Cu3Ln2(oda)6(H2O)6]•nH2O}n (LnIII: La, Gd, Yb) catalysts on the heterogeneous oxidation of olefins
Cancino, P.; Paredes García, Verónica; Aliaga, C.; Aguirre, P.; Aravena, D.; Spodine Spiridonova, Evgenia (Royal Society of Chemistry, 2017)© The Royal Society of Chemistry 2017.{[Cu3Ln2(oda)6(H2O)6]•nH2O}n (LnIII: La, Gd, Yb; odaH2: oxydiacetic acid) are reported as reusable heterogeneous catalysts in the oxidation of olefins. An influence of the LnIII ion ... -
The layered structure of poly[[hexaaqua( l4-benzene-1,2,4,5-tetracarboxylato) dicopper(II)] tetrahydrate]
Cancino, Patricio; Spodine Spiridonova, Evgenia; Paredes García, Verónica; Venegas Yazigi, Diego; Vega, Andrés (International Union of Crystallography, 2013)In the structure of the title compound, {[Cu2(C10H2O8)- (H2O)6] 4H2O}n, the benzene-1,2,4,5-tetracarboxylate ligand, (btec)4 , is located on a crystallographic inversion centre in a 4-coordination mode. The coordination ... -
Macrocyclic ZnII and CuII complexes as guests of the hybrid composites based on the layered MnPS3 phase. Comparison of spectroscopic properties
Fuentealba, Pablo; Serón, Lorenzo; Sánchez, Camila; Manzur Saffie, Jorge; Paredes García, Verónica; Pizarro, Nancy; Cepeda, Marjorie; Venegas Yazigi, Diego; Spodine Spiridonova, Evgenia (Taylor and Francis Ltd., 2014)© 2014 Taylor & Francis. A family of macrocyclic complexes [M2LnCl2] have been synthesized and characterized (M: CuII or ZnII; Ln: macrocyclic ligand derived from 2-hydroxy-5-methyl-1,3-benzenedicarbaldehyde and different ... -
Magnetic properties of hybrid organo-inorganic copper(II) oxovanadate(V) phosphate and phosphonate bridged systems
Spodine Spiridonova, Evgenia; Venegas Yazigi, Diego; Ushak, S.; Paredes García, Verónica; Saldías, Marianela; Le Fur, Eric; Pivan b, J.Y. (PERGAMON-ELSEVIER SCIENCE LTD, 2007-06)The hybrid organo-inorganic compounds [Cu4(bipy)4V4O11(PO4)2]nH2O (n 5) (1), [Cu2(phen)2(PO4)(H2PO4)2(VO2) Æ 2H2O] (2) and [Cu2(phen)2(O3PCH2PO3)(V2O5) (H2O)]H2O (3) which present different bridging forms of the ... -
Magnetic properties of vanadium(IV)-based extended systems: [(VO)3(l-PO4)2(2,20-bpy)(l-OH2)] 1/3H2O and (VO)2H4P2O9
Venegas Yazigi, Diego; Muñoz, K.; Saldías, Marianela; Valdés de la Barra, K.; Vega, Andrés; Paredes García, Verónica; Gómez García, Carlos J.; Le Fur, E.; Cañón Mancisidor, Walter Alberto; Spodine Spiridonova, Evgenia (Elsevier, 2013)The magnetic properties of [(VO)3(l-PO4)2(2,20-bpy)(l-OH2)]1/3H2O (1) and (VO)2H4P2O9 (2), a tubular and a layered vanadium(IV) phosphates containing triply oxido bridged VIV dimers, are analyzed considering the ... -
Modulating magnetic properties of a macrocyclic dinuclear copper(II) complex: Influence of counteranions on the crystal structure
Venegas Yazigi, Diego; Cortés, Susana; Paredes García, Verónica; Peña, Octavio; Ibáñez, Andrés; Baggio, Ricardo; Spodine Spiridonova, Evgenia (PERGAMON-ELSEVIER SCIENCE LTD, 2006-07-10)A group of dinuclear copper(II) compounds containing the macrocyclic complexes Cu2L2+ (LH2 = C(24)H(2)sN(4)O(4): a ligand derived from the condensation of 4-methyl-2,6-diformylphenol with 1,3-diamine-2-propanol) have been ...