The Ottosson group is active in three different mutually overlapping research areas, unified in the sense that the compounds investigated often have intriguing electronic structures (in our view).
- Development of selective chemistry with silenes, Si=C double bonded compounds: Focus is given to silenes with reversed Si=C bond polarities (Sið-=Cð+) as these, for example, give higher chemoselectivity in reactions with (hetero)dienes than naturally polarized (Sið+=Cð-) silenes. The goal is applications of these reactions in selective organic synthesis. Applications of Si=C bonded compounds in molecular electronics are also being examined.
- Aromaticity effects in electronically excited states: In this project area we exploit the reversal of the electron counting rules for aromaticity and antiaromaticity in the lowest triplet and singlet pp* excited states annulenes as compared to their electronic ground state. We have shown that a series of properties are varied through the mutual change in ground and lowest excited state aromaticity.
- Molecular electronics with focus on charge transport through compounds with unusual conjugation topologies, and in collaborations within the U3MEC constellation lead by Dr. Ottosson, development of new rigid molecular junction set-ups, novel anchor groups, and much more.
The research involves synthetic and spectroscopic studies as well as quantum chemical calculations and theories. Our projects normally progress along the line: qualitative MO- and VB-theory, quantum chemical calculations as tests of the qualitative theories, synthesis of the compounds that are the most promising according to computations, and finally, experimental testing in collaborations with other research groups.