Antonio Galdámez

Antonio Galdámez
University of Chile · Departamento de Química

Doctor in Chemistry

About

73
Publications
4,871
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359
Citations
Citations since 2016
39 Research Items
275 Citations
20162017201820192020202120220102030405060
20162017201820192020202120220102030405060
20162017201820192020202120220102030405060
20162017201820192020202120220102030405060
Additional affiliations
March 2013 - present
Universidad of Chile
Position
  • Professor (Assistant)

Publications

Publications (73)
Poster
Full-text available
INTRODUCCIÓN La Resonancia Plasmónica Localizada de Superficies metálicas es una propiedad característica de los materiales nanoestructurados[1]. Una aplicación importante de esta propiedad es modificar la luminiscencia de materiales. Se ha reportado una amplificación de señales fluorescentes de compuestos orgánicos e inorgánicos (puntos cuánticos)...
Article
Full-text available
A new Rhodamine-based ́́Turn On‘‘ fluorescent probe (E)-3',6'-bis(diethylamino)-2-((2,5-dimethoxybenzylidene)amino)spiro[isoindoline-1,9'-xanthen]-3-one (WGB) was synthesized. Results show that WGB is selective for Cu2+ cations, forming a WGB-Cu2+ complex in a 2:1 stoichiometry, confirmed through density functional theory (DFT) electronic structure...
Article
Full-text available
Compounds of the solid solution series SnTe 1– x Se x , derived from pristine SnSe and SnTe, are considered as thermoelectric lead-free materials. The crystal structure re-refinement of NaCl-type SnTe 0.73 (2) Se 0.27 (2) is based on single-crystal X-ray diffraction data and results in higher precision of the bond length [Sn—(Te,Se) = 3.0798 (3) Å]...
Article
Full-text available
In this work, we investigate the significant interest of chromium-doped spinels (CDS) resulting in their characteristic red photoluminescence (PL) due to the strong crystal field and the octahedral coordination of the Cr3+ ion. An increase in the luminescence efficiency of these CDSs by interaction with plasmon excitation is studied with the object...
Article
Full-text available
A series of CuCr2-xSnxS2.3Se1.7 and CuCr2-xSnxS1.7Se2.3 (x = 0.4, 0.6, and 1.0) compounds were prepared by solid-state reaction at a high temperature. Single-crystal X-ray diffraction analysis showed that CuCr1.1Sn0.9S2.3Se1.7 crystallizes in a spinel-type structure (cubic Fdm space group). The others samples were also consistent with a spinel-type...
Article
Full-text available
Herein, we report the synthesis, characterization, and electrical properties of lead-free AgSnm[Bi1−xSbx]Se2+m (m = 1, 2) selenides. Powder X-ray diffraction patterns and Rietveld refinement data revealed that these selenides consisted of phases related to NaCl-type crystal structure. The microstructures and morphologies of the selenides were inves...
Article
The BiFeO3 –NaNbO3 electroceramics, synthesized by the ceramic method, are studied aiming to obtain materials with a well-defined thermistor response coexisting with a relevant magnetic response. XRD data and Raman analysis reveal a structural transition as a function of composition. Compositional features explored from ICP, XPS and EDS measurement...
Article
Filifolinol is a natural occurring spirodihydrobenzofuran isolated from the resinous exudates of Heliotropium filifolium, a Chilean endemic shrub. Filifolinol and some of its derivatives have shown interesting biological activities against pathogens that attack salmonid species. Whereas the synthesis of spirodihydrobenzofurans has been limited to t...
Article
Full-text available
C 14 H 19 N 2 O 2 Cl, tetragonal, P 4 1 (no. 76), a = 6.8614(8) Å, c = 29.820(5) Å, V = 1403.9(4) Å ³ , Z = 4, R gt ( F ) = 0.0311, wR ref ( F ² ) = 0.0549, T = 150(2) K.
Article
Highly sodium deficient Na0.6NbO3 (NN) ceramics were prepared and characterized. Their mean structure could be described by a mixture of the predominant P polymorph (S.G. Pbma) and the Q phase (S.G. P21ma), at room temperature, as deduced from Rietveld refinements of Powder X-ray diffraction and Raman scattering data. Besides, microstructural and c...
Article
Two hitherto unknown organometallic compounds with antitumor activity, [Ru(η⁶-2-(1-propenyl)anisole)(en)(Cl)]PF6 (3) and [Ru(η⁶-2-(1-propenyl)anisole)(en)(l)]PF6 (4), where en is ethylenediamine, were synthesized and completely characterized using standard techniques (¹H and ¹³C NMR, high-resolution MS and elemental analysis). The lipophilicity and...
Article
A new series of (Cu)tet[Cr2-xSn x ]octS4-ySe y compounds was prepared by solid-state reaction at high temperature. Determination of the crystal structures by single-crystal X-ray diffraction revealed that CuCr1.0Sn1.0S2.1Se1.9, CuCr1.2Sn0.8S2.1Se1.9, CuCr1.3Sn0.7S2.2Se1.8, and CuCr1.5Sn0.5S2.2Se1.8 crystallize in a normal spinel-type structure (cub...
Article
Full-text available
The chalcone and bis-chalcone derivatives have been synthesized under sonication conditions via Claisen-Schmidt condensation with KOH in ethanol at room temperature (20-89%). The structures were established on the basis of NMR, IR, Single-crystal XRD, and MS. The best compound 3u had inhibitory activity (IC 50 = 7.50 µM). The synthesis, the antioxi...
Article
2-bromo-N-(2,4-difluorobenzyl)benzamide was synthesized in 92% yield by the reaction of commercial 2-bromobenzoic acid with (2,4-difluorophenyl)methanamine. The new ti- tle compound was characterized by 1 H and 13 C NMR, EI-MS and FT-IR. The crystal struc- ture was stablished by single-crystal X-ray diffraction analysis. The colorless plates crys-...
Article
Full-text available
Cu 0.51 In 0.75 Cr 1.74 Se 4 , cubic, Fd 3̄ m (no. 227), a = 10.6506(13) Å, V = 1208.2 Å ³ , Z = 8, R gt ( F ) = 0.0371, wR ref ( F ² ) = 0.0912, T = 293(2) K.
Article
We report the synthesis, characterization and electrical properties of Ag0.3Cu0.7InS2, Ag0.3Cu0.7InSe2 and Ag0.3Cu0.7InTe2. These solid solutions were synthesized via microwave-assisted solid-state reactions. Powder X-ray diffraction patterns were indexed in the space group 42σ. The chemical compositions were determined by scanning electron microco...
Article
Herein, we report the vibrational and optical properties of new Cu2ZnSn1-xGexS2Se2 solid solutions prepared by isomorphic substitution of a fraction of Se by S in Cu2ZnSn1-xGexSe4 (CZTGeSe) through ceramic method. The Raman spectra and x-ray diffraction analysis on samples confirms that they crystallize in Kesterite-type structure. The Raman peaks...
Article
Selenospinels, CuCr2−xMxSe4 (M = Zr and Sn), were synthesized via conventional solid-state reactions. The crystal structure of CuCr1.5Sn0.5Se4, CuCr1.7Sn0.3Se4, CuCr1.5Zr0.5Se4, and CuCr1.8Zr0.2Se4 were determined using single-crystal X-ray diffraction. All the phases crystallized in a cubic spinel-type structure. The chemical compositions of the s...
Article
We report the synthesis, characterization and thermoelectric properties of lead-free AgSnmSbSe2Tem (m = 2 and 10) systems. Powder X-ray diffraction patterns and Rietveld refinement results were consistent with phases belonging to the Pm3¯m space group. The microstructures and morphologies of these systems were investigated using scanning electron m...
Article
Full-text available
Iron accumulation, oxidative stress and calcium signaling dysregulation are common pathognomonic signs of several neurodegenerative diseases, including Parkinson´s and Alzheimer’s diseases, Friedreich ataxia and Huntington’s disease. Given their therapeutic potential, the identification of multifunctional compounds that suppress these damaging feat...
Data
Stern-Volmer equation (A), Benesi-Hildebrand equation (B) and equation used to calculate the fluorescence quantum yield (C). (PDF)
Data
Absorption and emission spectra of CT51. (A) Absorption spectra. (B) Emission spectra. (PDF)
Data
Crystal data and details of CT51 structure determination. (PDF)
Data
Voltammograms of CT51 at pH 6.8 and pH 3. Voltammograms of CT51 (0.96 mM) determined at pH 6.8 (red line) or pH 3.0 (black line). To perform the cyclic voltammetry analysis, 7.5 mL of ultrapure water, 0.5 mL Phosphate-buffered saline, pH 3.0 or 6.8, and 0.25 mL of 1.54 mM CT51 were added to the electrochemical cell. After a resting time of 3 s, the...
Data
Cu is not involved in rotenone-induced 4-HNE-protein adduct formation. (A) Immunofluorescence of 4-HNE-protein adducts formed under basal culture conditions (Control) and in cultures treated for 24 h with the oxidative stress inductor rotenone (3 μM), in the absence or presence of 250 or 500 nM of the Cu+1 chelator bathocuproine (BC) or CT51. The f...
Article
Two new organometallic compounds with the general formula [Ru(η⁶-anethole)(en)(X)]PF6, where X = Br (5) or I (6) and en = ethylenediamine, were synthesized and fully characterized using standard techniques (NMR, MS and elemental analysis). Displacement of the proton and carbon aromatic chemical shifts of anethole to the upper field in both compound...
Article
Full-text available
Polycrystalline Cu2ZnSnS4-xSe x (X=1, 2, 3) compounds were synthesized by conventional solid-state reactions. The samples were characterized by powder X-ray diffraction (XRD), energy-dispersive X-ray analysis (SEM-EDS), Raman spectroscopy, diffuse reflectance UV-vis and Photoluminescence. All ofphases crystallize in the tetragonal kesterite-type st...
Article
Full-text available
A p-tertbutylcalix[4]arene derivative was synthesized from a reaction of the diisothiocyanate p-tertbutylcalix[4]arene, obtaining crystals that were then characterized by mass spectroscopy, Raman spectroscopy, and single-crystal X-ray diffraction. The molecule presents two acid carbamothioic-n-ethoxy-methyl-ester substituent groups. Through crystal...
Article
Full-text available
A small series of tetrahydroindazoles was prepared, starting from 2-acetylcyclohexanone and different hydrazines using reflux and a focused microwave reactor. Microwave irradiation (MW) favored the formation of the desired products with improved yields and shortened reaction times. This is a simple and green method for the synthesis of substituted...
Article
A microwave-assisted method for the synthesis of tetracyclic tetrahydropyridines via an intramolecular imino-Diels-Alder reaction in water is reported. The reaction proceeds under catalyst-free conditions and shows excellent stereoselectivity.
Article
In this paper, the results of the synthesis, structural, vibrational and optical characterization of the CuInSSe pseudo-quaternary compound (CISS) obtained via the assistance of microwave radiation and the conventional ceramic method are compared. The synthesis was performed in vacuum sealed quartz ampoules and exposed to microwave radiation at 2,...
Article
This work reports the synthesis by solid-state reaction of Cu2Fe1-xCoxSnS4 solid solutions. Crystal structures of Cu2Fe0.8Co0.2SnS4 and Cu2Fe0.6Co0.4SnS4 were investigated by single crystal X-ray diffraction. Both phases crystallize in the tetragonal stannite-type structure. The volume of the tetrahedral [MS4] (M Combining double low line Fe, Co) p...
Article
New solid solutions Cu2MnxFe1−xSnS4 were prepared by direct combination of the corresponding elements at 850 °C. The crystal structure of Cu2Mn0.4Fe0.6SnS4 was determined by single-crystal X-ray diffraction. This phase is described in the space group where each cation is tetrahedrally coordinated to four sulfur anions in a sphalerite-like arrangeme...
Article
CuTi2-xMxS4 (M=Fe, Mn, Co; x=0.3, 0.5) and CuCr2-xTixSe4 (x=03, 0.5, 0.7) chalcospinels were synthesized by conventional solid-state reactions. Their crystal structures were determined by single-crystal X-ray diffraction. All of the phases crystallized in cubic spinel-type structures (space group, Fd (3) over barm). For all of the chalcospinel comp...
Article
Full-text available
The crystalline structure of spinels is extremely flexible due to the presence of several sublattices in which the cations can be distributed and localized in different crystallographic sites depending on their sizes, oxidation states or coordination numbers. Cationic substitution and ions-extraction are appropriate tools to change the oxidation st...
Article
The nominal compositions Ag0.8Cu0.2SbS2 and Ag0.7Cu0.3SbS2 have been synthesized by conventional ceramic solid-state reaction at high temperature. X-ray diffraction (XRD) and scanning electron microscopy chemical analysis (SEM-EDAX) revealed single phases, isostructural to the natural miargyrite alpha-AgSbS2 mineral. Examination of the lattice para...
Article
Full-text available
Three coumarin-derived fluorescent probes, 3-acetyl-7-[(6-bromohexyl)oxy]-2H-chromen-2-one (FM1), 7-[(6-bromohexyl)oxy]-4-methyl-2H-chromen-2-one (FM2) and ethyl 2-{7-[(6-bromohexyl)oxy]-2-oxo-2H-chromen-4-yl}acetate (FM3), are described, with their photophysical constants. The compounds were tested in preliminary studies employing epifluorescence...
Article
Full-text available
The solid solutions Cu2Fe1-XCoXSnS4, with stannite-type structure are stable up to about 800°C. The electrical properties of the Cu2Fe0.4Co0.6SnS4 ceramic were investigated by complex impedance. The real and imaginary dielectric permittivity dependence with the temperature were measured between 10kHz and 1 MHz in temperature range 77-280K, finding...
Article
A new family of Cu2Mn1−xCoxSnS4 chalcogenides has been synthesized by conventional solid-state reactions at 850 °C. The reactions products were characterized by powder X-ray diffraction (XRD), energy-dispersive X-ray analysis (SEM-EDS), Raman spectroscopy and magnetic susceptibility. The crystal structures of two members of the solid solution serie...
Article
Full-text available
The new solid solutions AgPbSb1 − x Bi x S3 were prepared by solid state reactions. The phases were characterized by powder X-ray diffractions (XRD), scanning electron microscopy, and thermal analysis. The XRD patterns of different members (x = 0.5, 0.7, 0.8, and 1.0) are consistent with pure phases crystallizing in the cubic PbS-type structure. Th...
Article
Full-text available
12b-Hydroxy-5,6,8,12b-tetrahydroisoindolo[1,2-a]isoquinolin-8-one (4), 5,6,8,12b-tetrahydroisoindolo[1,2-a]isoquinoline (5) and 12b-hydroxy-5,6,8,12b- tetrahydroisoindolo[1,2-a]isoquinoline (6) were obtained by reduction of 4,5,8,12b-tetrahydroisoindolo[1,2-a]isoquinolin-8-one (3) with LiAlH 4/THF/N 2. The precursor and products were characterized...
Article
Full-text available
The crystal structure of ethyl 7-hydroxy-2-oxo-2H-chromene-3-carboxylate monohydrate (1), C12H10O5.H2O, was established by X-ray crystallographic analysis. The molecule of the title compound is essentially planar except for the carboxylate substituent group. The crystal packing supramolecular array arises from hydrogen bonds and intermolecular C-H...
Article
Full-text available
The title compound (1, trivial name: 9 (or 3)-nitrocytisine) crystallizes with two independent molecules in the asymmetric unit. In its structure two rings form a bispidine framework that is fused to a 3-nitro-2-pyridone group. The half-normal probability plot reveals that the two molecules do not show any significant geometrical differences, excep...
Article
The crystal structure of N-methyl-1H-indole-2-carboxamide C10H10N2O was determined by single crystal X-ray diffraction. The structure can be described as consisting of an indole group and as substituent, linked at C2, the N-methylcarboxamide group. The molecular structure is essentially planar. The crystal packing results in N-H-------O hydrogen bo...
Article
Full-text available
The title compound was prepared by cyclization of 2-(3,4-methylenedioxyphenyl)ethyl-3-hydroxyisoindolin-1-one in concentrated hydrochloric acid. The compound crystallizes in the orthorhombic space group Pca21 (No. 29) with a = 27.034(5) Å, b = 4.5093(9) Å, c = 10.667(2)Å, V = 1300.4(4) Å3 and Z = 4. The crystal consists of a single enantiomer. The...
Article
Full-text available
The quaternary alkali metal, rare earth thiophosphate phase K4Sm2[PS4]2[P2S6] was synthesized by ceramic method and characterized by powder X-ray diffraction (XRD), SEM-EDX scanning electron microscope-microprobe analyses, electrochemical impedance and magnetic measurements. The crystal structure consists of layers of 2∞Sm2[PS4]2[P2S6]4- separated...
Article
The (Mn1−xCdx)Cr2S4 phases (0≤x≤0.6) have been synthesized from the corresponding elements at 1123K. These samples were characterized by powder X-ray diffraction (XRD) and magnetic susceptibility. The (Mn1−xCdx)Cr2S4 compounds crystallize in the space group Fd-3m with cell parameters a=10.101(6)Å, 10.139(3)Å, 10.165(2)Å, and 10.192(1)Å for x=0, 0.2...
Article
Colossal magnetoresistance (CMR) materials such as REMnO3 perovskites and AB(2)S(4) thiospinels have been well studied in the past. The authors present thiospinel compounds with A=Mn, since they may be viewed as a link to REMnO3 CMR perovskites. Ferrimagnetic MnCr2S4 is known to present a T-c of 65 K and a magnetic transition towards a non-collinea...
Article
A new quaternary alkali metal, rare earth thiophosphate was synthesized by the ceramic method and characterized by single crystal X-ray diffraction: K{sub 2}SmP{sub 2}S{sub 7} crystallizes in the monoclinic space group C2 (no. 5) with the unit cell parameters a = 22.746(5) A, b = 6.7362(13) A, c = 8.9004(18) A, {beta} = 99.68(3){sup o}, V = 1344.3(...
Article
Full-text available
The intercalation compounds Li0.43(PEO)2.4(H2O)1.4K0.57BiP2S6 and Li0.38(PEO)2.1(H2O)1.6K0.62SbP2S6 have been synthesized by the insertion of polyethylene oxide PEO in LiKMP2S6 (M=Bi, Sb), that contained Li+ and K+ exchangeable cations in their interlayer space. The polymer PEO is able to associate interlayer Li+ cation modifying the ionic conducti...
Article
The new phases {alpha}-NaSbP{sub 2}S{sub 6} and {beta}-NaSbP{sub 2}S{sub 6} were synthesized by ceramic and reactive flux methods at 773 K. The structures of {alpha}-NaSbP{sub 2}S{sub 6} and {beta}-NaSbP{sub 2}S{sub 6} were determined by the single-crystal X-ray diffraction