|Project Leader: Paweł Szarek, PhD DSc||Project period: 2017 - 2021|
|Project funding: OPUS 11, NCN|
The enterprise of chemistry is about making and characterizing of new chemical compounds. There are 118 chemical elements currently known, but only about 2/3 of them are stable enough to be used for making compounds, which could be used by humans. Chemical compounds consist of different combinations of elements, for example water is composed of hydrogen and oxygen in the ratio of 2 to 1. Fortunately, many elements may adopt several different “oxidation states” that it forms of element differing formally by the number of electrons at a given atomic center. This enables existence of a larger number of combinations of chemical elements – that is, of chemical compounds. For example, one way of changing oxidation state of oxygen in water leads to oxygenated water (so called hydrogen peroxide). With its chemical formula, H2O2, different from that of water, H2O, it also has very different chemical and physical properties. The oxidation states may be either negative or positive, but for most elements known the oxidation states never surpass the –4 to +4 range, more rarely +5, +6 or +7 and +8. Only one exception is known, that of recently prepared cation of iridium and oxygen, IrO4+, where iridium metal adopts the +9 oxidation state (Wang et al., Nature 2014). Some more were speculated by theoreticians. However, there are no systems known to this day, which would be neutral (i.e. carry no total charge) and show the oxidation state beyond +8.
The current project targets theoretical exploration for new chemical species which might contain heavy transition elements of the 6th Period at oxidation states from +9 to +12 or selected
The research which we will carry consist of systematic exploration of compounds of iridium, platinum, gold and mercury, and selected lanthanides as they have potential for adopting
By performing this research we hope to respond to the three fundamental questions:
Laboratory of Technology of Novel Functional Materials