Research

The department research directions:

  1. Synthesis and characterization of transition metals complexes with heterocyclic carboxylic acids and thiosemicarbazones.
  2. Micro-and nano- electrochemical machining.

In the last three years two employees of the General Chemistry Department sustained their PhD theses.

In 2010 Silvia Melnicfinished her PhD thesis in chemistry “Synthesis and characterization of homo-and heteronucleartransition metals clusters with heterocyclic carboxylic acids”. Contemporary coordination chemistry deals more frequently with metal complexes with polyfunctional ligands, focusing on fatty carboxylic acids that exhibit a wide range of physical and chemical properties. The diversity of these compounds and structures and their properties are due to a large and extraordinary ability of carboxylic acids anions to coordinate. The interest in carboxylate acids which forms this kind of complexes is determined by a number of features such as the property of homo-and heteronuclear clusters forming. The thesis was intended to carry out the synthesis and study with various chemical and physicochemical methods the oxo-trinuclear complexes of Fe (III) and 4f elements of type 2 furancarboxylic acid. Solving raised problems included the establishing of the following objectives: improving the methods of synthesis of carboxylates known from the literature, the development of new synthetic methods, obtaining and study of new complexes with fragments {Fe3O}, {Fe2MO}, {Ln2M} homo and heteronuclear with Fe (III), of metal 3d and 4f metal type 2 furancarboxylic acid, synthesis and study of nanoparticles in the carboxylate fragment {Fe3O} and {Fe2MO}, complexes obtaining with biologically active properties.

In 2012 Pavel Globa finished his PhD thesis in chemistry “Micro-and nano- dimensional electrochemical deposition of copper and silver”. In this study the micro-and macrodistribution of local electrochemical deposition of copper and silver using thick plastic mask is described. It was shown that during the electrochemical deposition process of copper and silver the mask plays the role of “leveling agent” in a wide range of electrochemical deposition rate values (iavg / il= 0,1 – 0,75) and the dimensionless thickness of coatings (L ~ 0.13 to 0.5). It is shown that a uniform metal coating can be obtained using porous semiconductor nanocomposite type AIII–BV and that the uniformity of the coatings is determined by the depth of the “filling” δ.It has been shown that it is possible to accurately predict the deposition rates of copper and silver. It was found the dimensional effect of the corrosion rate of the metal in the process ofelectrochemical nanomaterialsobtaining.

The lecturer Elena Jora is finishing her PhD thesis “The formation, structure and analytical properties of complex compounds of Pd(II) with tridentate thiosemicarbazones”.Tiosemicarbazones are a group of organic compounds widely used as ligands in coordination chemistry. These substances form coordinative combinations that often have antimicrobial properties and are active catalysts. The purpose of her work is to search the conditions for crystal compounds formation of tridentate complexes of thiosemicarbazones with Pd(II) ions and to investigate how the radical steric effect influence the coordination of the ligand with Pd(II). Also, the work describes the influence of inorganic anion complex salts of Pd(II) on coordination of thyosemicarbazones and study the catalytic Suzuki-Miyamura reaction.