Forschungsgebiete

Organoelement Chemistry

Our research in fundamental organoelement chemistry focuses on specific bonding situations, unique properties such as σ- and π-conjugation and chirality. In this respect controlling the stereochemistry of stereogenic main group element atoms is part of our investigations, be it for fundamental questions of chirality or the stereochemical alignment of multiple stereogenic centers (SFB 1319). For key publications on specific topics see below.

R. Franz, B. Szathmári, C. Bruhn, Z. Kelemen, R. Pietschnig "Gradual donor stabilization of a transient ferrocene bridged bisphosphanyl phosphenium cation" Inorg. Chem., 2023, 62 (10), 4341–4350. link
R. Franz, S. Nasemann, C. Bruhn, Z. Kelemen, R. Pietschnig, „Chalcogen transfer rearrangement: Exploring inter- vs. intramolecular P-P bond activation” Chem. Eur. J. 2021, 27, 641. link
F. Roesler, M. Kovács, C. Bruhn, Z. Kelemen, R. Pietschnig „ Phosphetes via transition metal free ring closure – taking the proper turn at a thermodynamic crossing” Chem. - Eur. J. 2021, 27, 9782–9790. link
S. Borucki, Z. Kelemen, M. Maurer, C. Bruhn, L. Nyulászi, R. Pietschnig, "Stereochemical alignment in triphospha-[3]ferrocenophanes“ Chem. Eur. J. 2017, 23, 10438. link
M. Blunder, N. Hurkes, M. List, S. Spirk, R. Pietschnig, "Silanetriols as in vitro AChE Inhibitors", Bioorg. Med. Chem. Lett., 2011, 21, 363.
S. Spirk, F. Belaj, J. H. Albering, R. Pietschnig, "Formation of a Silylated 1-Silaallene via an Intermediate 1-Chloro-1-Silaallene", Organometallics., 2010, 29, 2981.
C. Moser, F. Belaj, R. Pietschnig, "Diphospha[2]ferrocenophane and 1,4-dihydrotetraphosphane - Stereoselective Formation via hydrolytic P-P bond formation”, Chem. Eur. J., 2009, 15, 12589.
R. Pietschnig, D. R. Powell and R. West, "Reduction of Terphenyltrifluorosilanes: C-C Insertion Products and Possible Formation of a Disilyne", Organometallics, 2000, 19, 2724.

Molecular Hybrid Materials

In our research we are aiming at the assembly of molecular materials at interfaces and via imprint techniques. Based on our activities we have been involved in the European research initiative (SIPs) targetting smart inorganic polymers. For key publications on specific topics see below.

S. Dey, D. Kargin, M. V. Höfler, B. Szathmári, C. Bruhn, T. Gutmann, Z. Kelemen, R. Pietschnig, "Oligo- and polymerization of phospha[2]ferrocenophanes to one dimensional phosphorus chains with ferrocenylene handles" Polymer, 2022, 242, 124589. link
D. Klintuch, M. V. Höfler, T. Wissel, C. Bruhn, T. Gutmann, R. Pietschnig, „Trifunctional silyl groups as anchoring units in the preparation of luminescent phosphole-silica hybrids” Inorg. Chem. 2021, 60 (18), 14263-14274. link
D. Löber, S. Dey, B. Kaban, F. Roesler, M. Maurer, H. Hillmer, and R. Pietschnig, „3D Micro/Nanopatterning of a Vinylferrocene Copolymer” Molecules 2020, 25, 2438. download
F. Roesler, B. Kaban, D. Klintuch, U.-M. Ha, H. Hillmer, R. Pietschnig, „Tailoring Phospholes for Imprint of Fluorescent 3D Structures” Eur. J. Inorg. Chem 2019, 4820-4825. link
R. Pietschnig, "Polymers with pendant ferrocenes" Chem. Soc. Rev. 2016, 45, 5216-5231.
R. Pietschnig, S. Spirk, "The Chemistry of Organo Silanetriols" Coord. Chem. Rev. 2016, 87-106.
M. Reiner, R. Pietschnig, C. Ostermaier, "Tracking the Effect of Ad-Atom Electronegativity on Systematically Modified AlGaN/GaN Schottky Interfaces" Appl. Mater. Interfaces, 2015, 7(41), 23124-23131.
N. Hurkes, H. Ehmann, M. List, S. Spirk, M. Bussiek, F. Belaj, R. Pietschnig, "Silanol Based Surfactants - Synthetic Access and Properties of an Innovative Class of Environmentally Benign Detergents" Chem. Eur. J. 2014, 20, 9330-9335.
S. Spirk, H. Ehmann, M. Reischl, R. Kargl, N. Hurkes, M. Wu, J. Novak, R. Resel., R. Pietschnig, V. Ribitsch, "Surface Modifications Using a Water Stable Silanetriol in Neutral Aqueous Media ", Appl. Mat.Interf. 2010, 2, 2956.

Sustainable Chemistry

In the context of sustainable chemistry we explore and develop materials for thermal and electrochemical energy storage and catalysts for C-H Activation. Our key publications in this field are:

M. Egger, I. Köhne, D. Wickenhauser, W. Schlemmer, S. Spirk, R. Pietschnig "Electrochemistry and stability of 1,1’-ferrocene-bisphosphonates" ACS Omega, 2023, 8 (12), 10899–10905. link
T. Brünig, M. Maurer, R. Pietschnig, "Sorbent Properties of Halide free Ionic liquids for Water and CO₂ Perfusion" ACS Sustainable Chem. Eng., 2017, 5, 7228. link
T. Brünig, K. Krekić, C. Bruhn, R. Pietschnig, "Calorimetric studies and structural aspects of Ionic Liquids in designing sorption materials for thermal energy storage" Chem. Eur. J., 2016, 22, 16200-16212. link
E. F. Aboelfetoh, R. Pietschnig, "Preparation, Characterization and Catalytic Activity of MgO/SiO₂ supported Vanadium Oxide Based Catalysts" Catal. Lett. 2014, 144, 97-103.
E. Fahmy Aboelfetoh, R. Pietschnig, "Preparation and Catalytic Performance of Al₂O₃, TiO₂ and SiO₂ Supported Vanadium Based-Catalysts for C-H Activation", Catal. Lett., 2009, 127, 83.