The oral communication sessions will be held in the rooms: Milão, Ibiza, Madrid, Roma in the Convention Center and also in the plenary hall in the Premium Norte Hotel. The place where the poster should be mounted is indicated with the corresponding research area of the author.
Electronic Structural Properties II Room Amadeus (Plenarry room)
Electronic Properties of the coordination compounds of the ligands trithiocarbonate, perthiocarbonate and xanthate in the S 1s region
Atomic Science II Room Milão
Determinaciones experimentales de Secciones Eficaces de Produccion de Fluorescencia
Fragmentation Mechanisms of Perfluorinated compounds using Synchrotron Radiation: Study of CF3CF2CF2C(O)Cl
Surfaces Interfaces and Nanosystems II Room Ibiza
Alkanethiols Adsorbed on Platinum, Palladium and Bimetallic Pd/Au
Use of operando XAS-Raman-Mass Spectroscopies to evaluate catalytic behavior of Cu/Al2O3 catalysts on ethanol dehydrogenation
Understanding the stability of Ni/CeO2/Al2O3 catalysts for reforming of ethanol as addressed by temperature-resolved XANES analysis
Soft Materials Room Madrid
Estudio sobre micelas unimoleculares derivadas de la polietilienimina hiperramificada: SAXS, XRR, LB
On the action of surfactants in the protein denaturation: a study by SAXS and ITC
Silica gels and xerogels prepared by sol gel process: acid catalysts and microstructure
Report on the design and test of liquid sample holder for SAXS measurements under static magnetic field
Reactive sputter magnetron reactor for preparation of thin films and simultaneous in-situ structural study by X-ray diffraction
31 Estudo da formação de dímeros de ácido acético e ácido fórmico duplamente deuterado na fase gasosa na borda K do oxigênio e do carbono. 32 Determinação teórico-experimental do potencial de ionização de moléculas biologicamente interessantes na faixa UVV.
RAY RESONANT RAMAN SCATTERING EXTENDED FINE STRUCTURE
ELECTRONIC PROPERTIES OF THE COORDINATION COMPOUNDS OF THE LIGANDS TRITHIOCARBONATE, PERTHIOCARBONATE AND XANTHATE IN THE S 1s REGION. Experimental studies are underway to validate the inhibitory properties of the designed compounds.
CH 2 OH, following Photoexcitation with Synchrotron Radiation between 100 and 1000 eV
Gas electron diffraction and vibrational analysis were interpreted as an equilibrium of two conformers in the gas phase. The studies were carried out using the Gaseous Sample Experiment Station and coincidence techniques in the TGM and SGM beamlines at LNLS.
STRUCTURE DETERMINATION OF LASSBIO-1515: A NEW LEAD-COMPOUND CANDIDATE OF THE
ACYLHYDRAZONE CLASS
The intensity evolution of the 3d theater hole satellite Kβ1.3 of the Zn emission spectrum was studied as a function of excitation energy from threshold to saturation. The assignment of satellite structures to 1s3d multielectron effects was confirmed with an energy threshold of 15.2±0.4 eV, which is close to the Z+ 1 model prediction of 17.4 eV.
OXIDE NANO-LAYERS STUDIED BY X-RAY RAMAN SCATTERING IN TOTAL REFLECTION GEOMETRY
In this work, we have published a series of results obtained to investigate the sulfur and copper environments in new synthetic covalent sulfenylcarbonyl compounds that can be used as ligands in the coordination chemistry. The Cu K EXAFS/XANES study enabled us to obtain respectively the coordination numbers and average distances of first neighbors sulfur (Feffit pack) and hybridizations responsible in the complex formation. With the FDMNES program we can also investigate the electronic state responsible for the charge transfer in the system.
In this work, we study the oscillations in the RRS fine structure of various metal compounds. In this work, we published a series of results obtained to investigate the sulfur and copper environments of new synthetic covalent sulfenylcarbonyl compounds that can be used as ligands in coordination chemistry. The Cu K EXAFS/XANES study allowed us to obtain the coordination numbers and average distances for first-neighbor sulfur (Feffit pack) and hybridizations responsible in the complexation, respectively.
Using the FDMNES program, we were also able to investigate the electronic mode responsible for the tax transfer in the system. The pore slope was 4.0 in the HF xerogels and 2.7–2.6 for the others, indicating smooth and rough separation surfaces, respectively.
ESTUDIO SOBRE MICELAS UNIMOLECULARES DERIVADAS DE LA POLIETILIENIMINA
HIPERRAMIFICADA: SAXS, XRR, LB
COMPLEJOS SUPRAMOLECULARES
ONICAMENTE DERIVADOS DE LA POLIETILENIMINA HIPERRAMIFICADA
The 2D SAXS patterns of PE and composites are isotropic, indicating that BFs are homogeneously distributed in the matrix. However, the introduced BF affects the structure and morphology of the matrix, changing the initial structure. DTA (Differential Thermal Analyze) and TG (Thermogravimetry) were done to search for the best calcination conditions leading to the formation of the desired phase.
Characteristic Eu3+ transitions were identified in the emission spectra, indicating the presence of Eu3+ in the CaAl2O4 matrix. These results are discussed in terms of the good hardness and ductility that the coatings have. Several methods have been developed to determine the event position in a proportional detector [2].
An elemental analysis is achieved by detecting the X-ray fluorescence produced in the microvolume. In this work, Montecarlo radiative transport simulation was tested as a low-cost solution for characterizing the excitation lens.
He was also responsible for introducing Shannon's sampling theorem into X-ray diffraction techniques for quantifying the information content of data and its resolution. The nature of the deposited compound will then depend on the nature of the magnetron target and the nature of the ions produced in the plasma. The incorporation of Pd significantly increased the reduction of Ce in mixed oxide nanopowder SDCs.
The structures in this spectrum are attributed to the unoccupied parts of the t2g and eg sub-bands. The electronic structure of the double perovskite Sr2F eM oO6 was studied using X-ray photoemission spectroscopy (XPS). The behavior of the spiral spin structure torsion angle as a function of the AF layer thickness was investigated by magnetometry and ferromagnetic resonance.
In order to improve the magnetic spin structure of the layers, asymmetry ratios as a function of energy and angles and element-specific hysteresis loops at different incident angles were obtained by resonant magnetic X-ray diffraction in the SGM LNLS beamline. The interaction of the electric and magnetic subsystems can manifest itself as the magnetoelectric effect and the effect of mutual influence of polarization and magnetization.
ELECTRONIC PROPERTIES OF THE COORDINATION COMPOUNDS OF THE LIGANDS
TRITHIOCARBONATE, PERTHIOCARBONATE AND XANTHATE IN THE S 1s REGION
RAY PHOTOELECTRON SPECTRA OF LiMn 2 O 4
OBTAINED BY SOL-GEL ASSISTED BY CORN STARCH
The intensity of the XMCD is proportional to the average magnetic moment projected in the direction of the incident X-ray, and the sign reflects the direction of the moment experienced with respect to that of the total magnetization. To reduce the rare earth from Eu3+/Eu2+ it is necessary to use special schemes in the production of the sample containing rare earth. The duration of long-term phosphorescence emission is increased by co-doping with rare earth ions, especially Dy3+ ions.
Therefore, the effect of the trivalent rare earth ions RE3+ (such as Gd, Dy, Er and Y) as co-dopant in Eu-doped SrAl2O4 material was investigated. In this work, the DXAS (Dispersive X-ray Absorption Spectroscopy) technique is used to monitor the XANES spectrum of the Eu ions during the calcination program in different atmospheres. Analysis of the reduction dynamics can provide information about the synthesis process and the DXAS technique can be used to monitor this.
The results indicate that all Eu ions are reduced at 1100C, but that part of the Eu reverts to Eu3+. The comparison of the IPs of the dopant Eu2+ and the codopants RE3+ can explain the stabilization of Eu2+ ion in the SrAl2O4:Eu2+ when it is codoped with the other rare earth.
CORRELACI ´ ON DEL COMPORTAMIENTO
Al 2 SiO 7 synthesis, local order and optical properties studied using synchrotron radiation
These results can be used to build a model to explain the scintillation mechanism of the doped CAS samples. The XEOL decay curves showed characteristic decay constants around a few tenths of nanoseconds, putting these materials in the group of the fastest known scintillators. To investigate the source of magnetism in nanostructured zinc ferrite, we present an X-ray absorption (XAS) and magnetic circular dichroism (XMCD) study at the L2,3 edges of Fe on zinc ferrite samples of different morphologies (films and nanoparticles), all showing a relatively large magnetization at room temperature. The samples consist of: a) a thin zinc ferrite film grown at low O22 pressure of 10−5 mbar, the film thickness is 57 nm (ZFO1), b) nanostructured ZnFe2O4.
Results show that the observed enhancement of the electrochemical activity in nanostructured LSC cathodes is due to the higher SSA (14 m2/g) and the retention at room temperature of the LSC high-temperature cubic phase. High-resolution Renninger scans of NSH crystals were performed at the XRD1 station of the Brazilian Synchrotron Radiation Facility (LNLS). The results show that the symmetry of the crystals is practically the same regardless of the incorporation of manganese ions.
The excitation spectra of the samples showed charge transfer band (CTB) and sharp lines (f-f transitions) of Eu3+ ions. The process reported here is promising for the preparation of phosphors, as it results in a material with strong luminescence in the red region of the electromagnetic spectrum.
SYNTHESIS AND CHARACTERIZATION OF CALCIUM PHOSPHATE MACRO AND MESOPOROUS FOR DRUG
These measurements were performed on the D08B-XAFS2 beamline of the Brazilian Synchrotron Light Laboratory (LNLS). Acknowledgments: This work was supported by the Collaborative Agreement of the Brazilian Synchrotron Light Laboratory (LNLS, Brazil, proposal The reduction of their working temperature, which is usually around 900-1000oC, is one of the most important issues.
The aim of this work was to study the influence of crystallite size on the reducibility of NiO/GDC nanocomposites under dilute H2 using the DXAS technique. Acknowledgments: This work was supported by the Collaborative Agreement of the Brazilian Synchrotron Light Laboratory (LNLS, Brazil, proposal DXAS 10900), CNPq (Brazil, PROSUL program), AN-PCyT (Argentina), and MinCyT-CAPES (Argentina-Brazil). The main advantages of anodization include a simple synthetic procedure, a cost-effective scale-up process and the ability to control the dimensions of the structures and their charge transport properties.
Furthermore, the crystallinity of the semiconductor nanotubes has a decisive effect for many technological applications such as photocatalysis (water splitting) and solar cells (Gr¨atzel solar cells). In this work, we choose the EXAFS and XANES techniques to evaluate the electronic structure and structural disorder of the Ta2O5 NTs.
MATERIAIS H´IBRIDOS CONTENDO
MEDICAMENTOS
Avaliação do polímero CTA-MCM-41 contendo sílica em seus canais utilizando SAXS. Segundo Fabiano et al.[2], ocorre uma diminuição da atividade catalítica após aplicações sucessivas na transesterificação devido à lixiviação dos cátions CTA (cetiltrimetilamônio) do interior dos canais do material. A técnica de espalhamento de raios X em pequenos ângulos (SAXS) pode demonstrar a presença de polímero nos canais do material.
A composite multilamellar liposome containing chitosan attached to the inner and outer sides of the membrane and an oppositely charged polyelectrolyte, chondroitin, adsorbed on the surface was developed. The structure and surface properties of liposomes were studied using a combination of light scattering, ζ-potential, and small-angle X-ray scattering techniques. While the chitosan/chondroitin ratio affected the surface charge distributions, the polyelectrolyte concentration affected the structural properties of the liposomes, such as the stiffness of the phospholipid layers.
The surface charge of the resulting assembled liposome was affected by the type and concentration of the polyelectrolyte. By applying the modified Caill'e theory to the X-ray scattering curves, information about the internal structure of the liposomes was accessed.
