Organic Molecular Chemistry A02

The central goal of this project is the identification of the key construction principles which determine the materials properties of N-heteropolycycles. The preparation and chemical reactivity of azacoronenes and the synthesis and characterization of their oligomeric "expanded" derivatives is the objective of a major research effort within this project. Another focus is the synthesis of chiral fluorophores, in particular, enantiopure bay-substituted octaazaperopyrenedioxides (OAPPDOs) and their investigation as emitters of circular polarized light for applications in optoelectronic devices. Tetraazaperylene compounds, which act as solid state luminophores, will be grafted covalently onto photopolymerizable monomers, in order to fabricate micro-structured building blocks for the construction of micro-antennas and other devices.

R. Eichelmann, K. Bender, J. A. Guenther, L. A. Ziegenhagen, J. Ballmann, L. H. Gade, Org. Lett. 2025, 27, 1396. "Bay-aminated Octaazaperopyrenedioxides (OAPPDOs) as Precursors for Diazepine and Diazepinone Derivatives."

S. Steffens, T. Wollandt, K. Cordero-Solano, R. Eichelmann, A. Kochan, X. Sun, F. Letzkus, J. N. Burghartz, S. Ludwigs, L. H. Gade, H. Klauk, ACS Appl. Mater. Interfaces 2026, 18, 2162. "Flexible n-Channel Organic Transistors with Low Contact Resistance."

B. Rojas-Deij, L. Schneider, T. Bruckhoff, R. Eichelmann, P. Rohrmann, R. Candalh, J. Ballmann, F. Deschler, L. H. Gade, Chem. Eur. J. 2026, 32, e2906. "Bay-Phenolate Substitution in Twisted Octaazaperopyrenedioxides (OAPPDOs): Towards Structurally Stable Chiral Derivatives."