Graduate in Industrial Chemistry (2004-Universidade Federal de Santa Maria), master's in Chemistry (2007-Universidade Federal de Santa Maria) and Ph.D. in Chemistry from Universidade Federal de Santa Maria (2011) with an exchange program in Freie Universität Berlin (2009-2010). Post-doc research fellow in Universidade Federal do Paraná (2011). Currently is a professor at Universidade Federal de Santa Maria (UFSM). Member of the Laboratory of Inorganic Materials of the UFSM. Research fellow as Visiting Professor at McGill University (Montreal/Canada) via the institutional program CAPES PrInt within the project Smart Materials (2019-2020). Has experience in Inorganic and Organometallic Synthesis focusing on the Structural Chemistry of chalcogen derivatives, especially the Coordination Chemistry of tellurium.
EDUCATION
2007 - 2011 Doctorate in Chemistry. Universidade Federal de Santa Maria, UFSM, Santa Maria, Brazil, with Sandwich Doctorate in Freie Universität Berlin, FU Berlin, Germany.
2005 - 2007 Master’s in Chemistry. Universidade Federal de Santa Maria, UFSM, Santa Maria, Brazil.
2001 - 2004 Graduation (Bachelor) in Industrial Chemistry. Universidade Federal de Santa Maria, UFSM, Santa Maria, Brazil
Organotellurium(II) and -(IV) Compounds with Picolinoylbis(thioureas): From Simple 1 : 1 Adducts to Multimetallic Aggregates Sailer S. dos Santos, Vania D. Schwade, Ernesto Schulz Lang, Chien Thang Pham, Maximilian Roca Jungfer, et al. European Journal of Inorganic Chemistry, 2024 Reactions of 2,6‐dipicolinoylbis(N,N‐diethylthiourea) (H2LEt) with common tellurium(IV) starting materials such as PhTeBr3 or TeBr4 yield various tellurium(IV) and tellurium(II) compounds depending on the conditions applied. Equimolar amounts of H2LEt and PhTeBr3 give the 1 : 1 complex [PhTeIVBr3(H2LEt)], while with an excess of H2LEt, the tellurium compound is partially reduced and a {PhTeII}+ building block coordinates to both sulfur atoms of H2LEt under the formation of the ion pair [PhTeII(H2LEt)][PhTeIVBr4]. Similar reactions between H2LEt and TeBr4 give the neutral monomer [TeIIBr2(H2LEt)] or the coordination polymer [TeIIBr2(H2LEt)]∞. The latter compound is also formed with the assistance of Pb2+ ions. While the lead ions do not appear in the isolated product, similar reactions with transition metal ions such as Ni2+, Mn2+, or Co2+ result in the formation of heterobimetallic complexes, in which Te(II) building blocks are directed to the sulfur atoms of the deprotonated ligand {H2LEt2‐S,S}2−, while the transition metal ions occupy central coordination positions between two of the organic ligands using the pyridine nitrogen atom, carbonyl oxygen atom(s) and/or the nitrogen atoms of the thiourea units.
Bis(2-pyridyl)ditellane as a Precursor for [HgTe]-Based Clusters and Zwitterionic Compounds Felipe Dornelles da Silva, Artur Luís Hennemann, Robert Alan Burrow, Ernesto Schulz Lang, Ulrich Abram, et al. Journal of Cluster Science, 2022 Metal chalcogenide cluster compounds are interesting substances by virtue of their intrinsic electronic and optical properties and their potential usage as single-source precursors for semiconductor materials. Herein, the synthesis and structural characterization of six new [HgTe]-based cluster compounds derived from bis(2-pyridyl)ditellane (oPy2Te2), and different mercury salts are described: four neutral clusters of the composition [Hg4(PPh3)2(μ-oPyTe)6Cl2] (1), [Hg4(PPh3)2(μ-oPyTe)6Br2] (2), [Hg4(PPh3)2(μ-oPyTe)6I2]⋅DMF (3) and ([Hg8(μ-oPyTe)12SCl2]⋅5.25DMF (4), and the two zwitterionic clusters [Hg8(μ-HoPyTe)0.93(μ-oPyTe)11.07SBr2.93])⋅7.62DMF (5) and [Hg8(μ-HoPyTe)0.83(μ-oPyTe)11.17SI2.83])⋅7.25DMF (6) (oPy = 2-pyridyl). The compounds were studied by single-crystal X-ray diffraction, FT-IR spectroscopy, and confocal Raman microspectroscopy. Furthermore, the optical energy gaps of the compounds were estimated by solid-state UV–Vis diffuse reflectance spectroscopy. The compounds with the smaller core structure (1–3) presented the larger Eg values, confirming small-particle optical properties’ strong dependence on the core structure’s size and composition.
Cultural and technology elucidation of the Tupi-Guarani tradition through analysis of potsherds from Travessão do Rio Vermelho site (Santa Catarina - Brazil) by spectroscopy, SEM-EDS and chemometrics Thiago G. Costa, Antônio Sálvio Mangrich, Morgana H.Z. Hübner, Marcelino D.de M. Correia, Isabela da Silva Müller, et al. Applied Radiation and Isotopes, 2021 Ceramic fragments can provide an insight into the ancient culture and practices of groups of humans and their way of life (technology, cultural identity, social organization, habitation and economy). Scientific analysis can be used to obtain information on the ceramic production process, as well as the specificities of the material employed. In this research, all samples of archaeological potsherd from the Tupi-Guarani tradition were analyzed in order to identify and to characterize the structures, morphologies and the elemental composition by using by scanning electron microscopy (SEM-EDS) and multivariate statistical methods (PCA and HCA). FTIR spectroscopy revealed the presence of an organic residue in three samples along with carbonates, clay minerals, quartz and hematite. In addition, the presence of the stretching attributed to water molecules in crystalline systems was observed. Also, the presence of TiO2 in the anatase polymorphic form was detected using μ-Raman spectroscopy. These results indicate a firing temperature of between 800 and 1000 °C. In relation to the morphology, all samples revealed amorphous structures presenting isolated and heterogenic particles of different forms and sizes, and the EDS spectrum confirmed the elements present in the molecular structures elucidated by vibrational spectroscopy. The multivariate analysis has confirmed the correlation between the elemental compositions of ceramics collected from two different sites: a mountain region and a coastal area in Santa Catarina State, Brazil.
Synthesis and crystal structures of new complex salts containing both cationic and anionic tellurium(IV) species: The role of secondary bonds in the arrangement of tellurium based tectons Journal of the Brazilian Chemical Society, 2006
