The chemistry of polyiodides is, compared to the other halogens, fluorine, chlorine and bromine, vast and has been extensively explored. Mono-, di-, tri- and tetra- polyiodide anions with different iodine contents, e.g. [I29]3– or [I26]4– are known.
In the last few years our research group has expanded the multifaceted polyhalide chemistry to the elements bromine, chlorine, and fluorine. The polybromide monoanions [Br9]– and [Br11]– were synthesized and structurally characterized in our group. The V-shaped pentachloride [Cl5]– as well as the nonachloride [Cl9]– were synthesized for the first time and characterized by Raman spectroscopy. In this context we are also investigating halogen-halogen bonding interactions to get a deeper insight into the structure of the polyhalide anion itself and the structure forming effects in the solid state.
Polyhalide compounds show interesting properties for example high electrical conductivities and are therefore not only of academic interest. Based on these results we are developing new energy storage materials.
Polyhalogenanionen - Überraschende Vielfalt
Recent Discoveries of Polyhalogen Anions – from Bromine to Fluorine
The first structural proof for a higher polybromide monoanion. Investigation of [N(C3H7)4][Br9]
Beyond known Polyhalogens: Structural Proof of Undecabromide [Br11]-
Polychloride Monoanions from [Cl3]- to [Cl9]-: A Raman-Spectroscopic and Quantum-Chemical Investigation