In the reaction between Mg(AsF6)2 and an excess of XeF4 in anhydrous HF the first compound with XeF4 as a ligand on the central metal ion was isolated, [Mg(XeF2)(XeF4)](AsF6)2. X-ray structural analyses have shown that there are two ligands, XeF2 and XeF4, bound to the central metal ion. It is assumed that the XeF2 was obtained by the reduction of XeF4 during the process of crystallization. Since XeF2 is a much better ligand than XeF4, it is expected that all the formed XeF2 will be bound to the central metal ion.
COBISS.SI-ID: 22651943
Black AgSO4 could be prepared by the methathetic reaction of Ag(SbF6)2 and K2SO4 in anhydrous HF or by the reaction of AgF2 with H2SO4. According to thermoanalytical studies, the product is metastable and decomposes above 120 °C with the evolution of O2. The triclinic crystal structure of AgSO4 contains planar, rectangular AgO4 units that are connected by SO4 tetrahedra to form a three-dimensional network. Measurements of the temperature-dependent magnetic susceptibility indicate that there are strong antiferromagnetic interactions between the neighbouring Ag2+ cations.
COBISS.SI-ID: 23410215
Reactions between silylenes and fluorinated aromatic compounds were shown to be stereospecific. Similar mechanisms are almost unknown in organometallic chemistry. The products can be used as starting materials for the transfer of different fluorinated groups to organic substrates.
COBISS.SI-ID: 23814695
During the investigation of reactions between alkaline metal fluorides and titanium tetrafluoride, single crystals of K4Ti8F36.8HF and Rb4Ti8F36.6HF were prepared and their crystal structures determined. Both the structures contain previously unknown, discrete, octameric [Ti8F36]4- anions. Each of them is constructed from eight TiF6 octahedral units, sharing joint vertices and connected in that way into a cube. The herein reported [Ti8F36]4- anion represents the largest known example of discrete oligomeric species found in fluoride compounds with the metal in the oxidation state four.
COBISS.SI-ID: 26583079
The novel composite MoS2/C material was synthesised and characterised. MoS2/C is the first single synthesis step composite, containing MoS2 inorganic fullerenes (IF) interconnected with carbon. Inorganic fullerene units with round 12 nm in diameter are interconnected by amorphous carbon inclusions and form the agglomerates 50–100 µm in size. Urchinlike MoS2 catalyst exhibited higher activity compared to commercial MoS2 powder in hydrodeoxygenation of liquified wood. Oxygen content decreased from 43.3 % to 8.2 % (wt.) while residual phenolic oxygen is not removable with this particular catalyst. Observed catalytic performance offer new solutions in terms of biofuel processing. The research work was done in cooperation with the National Institute of Chemistry, Slovenia.
COBISS.SI-ID: 5537562
On the last page of every issue of the prominent journal Nature Chemistry a different chemical element is presented under the section captioned “In Your Element”. Invited article "The world of krypton revisited", which describes the element krypton and was published in the July 2016 issue, was written by M. Lozinšek and G. J. Schrobilgen. Krypton is the lightest member of the noble gas group which forms compounds that are isolable in macroscopic amounts. All known compounds of krypton have been derived from krypton difluoride which is thermodynamically unstable and a very potent oxidative fluorinator. Krypton chemistry research is therefore experimentally very challenging and only a handful of laboratories around the world possess the necessary know-how.
COBISS.SI-ID: 29676327
Mobile charged defects, accumulated in the domain-wall region to screen polarization charges, have been proposed as the origin of the electrical conductivity at domain walls in ferroelectric materials. Despite theoretical and experimental efforts, this scenario has not been directly confirmed, leaving a gap in the understanding of the intriguing electrical properties of domain walls. Here, we provide atomic-scale chemical and structural analyses showing the accumulation of charged defects at domain walls in BiFeO3. The defects were identified as Fe4+ cations and bismuth vacancies, revealing p-type hopping conduction at domain walls caused by the presence of electron holes associated with Fe4. In agreement with the p-type behavior, we further show that the local domain-wall conductivity can be tailored by controlling the atmosphere during high temperature annealing. This work has possible implications for engineering local conductivity in ferroelectrics and for devices based on domain walls. The research hes been conducted with the cooperation of several Slovenian and foreign research groups.
COBISS.SI-ID: 29936679
In this research we successfully showed utility of imidazolium fluoride [LDippH][F] that served as an efficient donor of fluoride ion. The mentioned reagent, prepared in 2016 by our group, reacts with germanium and silicon tetrafluorides (GeF4 in SiF4) and forms discrete trigonal-bipyramidal SiF5- in GeF5- anions. Such geometry of anions is relatively rare compared to the octahedral geometry of anions. Using X-ray structural analysis on a single crystal, we achieved the first structural determination of a discrete trigonal bipyramidal structure of GeF5- anion to date. We also published the first 19F NMR spectrum GeF5- in GeF62- anions in organic solvents, in acetonitrile. We completed the work by comparing the stability of the trigonal bipyramidal to octahedral species together with the interpretation of the disorder in the crystal structure as a result of the rigid rotation or the Barry pseudorotation mechanisms of the prepared anions.
COBISS.SI-ID: 30693927
Study of AgF2 · 2WOF5 compound showed that its crystal structure consists of layers built of Ag2+ cations bridged by [WOF5]– anions and not, as previously assumed, from the infinite [AgII–F]+? chains and [W2O2F9]– anions (correct is Ag(WOF5)2 and not AgF(W2O2F9)). The magnetic moments of Ag2+ from the same layer are almost perfectly antiferromagnetic aligned. Weak ferromagnetic inter-layer interactions are also present.
COBISS.SI-ID: 30102567
The original scientific article "Safety change management - a new method for integrated management of organizational and technical changes" was published in a recognized scientific journal. The article describes the concept, use and testing of the new method for the assessment and management of the complex technical and organizational changes in the industrial establishments related to the aspect of process safety (major accident hazards). That method the author directly implemented in the management system in large industrial organization in Europe in 2017, within the consortium of the consulting organizations, technically led by the Jožef Stefan Institute.
COBISS.SI-ID: 29641767