This image showsAlexander Allgaier

Alexander Allgaier

Doctoral Researcher
van Slageren Group

Contact

Pfaffenwaldring 55
70569 Stuttgart
Deutschland
Room: 8.309

Subject

Electronic Structure and Dynamics of Chromium Based Catalyst

In this project different chromium complexes are investigated with an array of analytical methods. The focus is on EPR spectroscopy and SQUID magnetometry to understand the electronic properties of these compounds. The complexes are used for catalysis in an activated state which will also be investigated. The aim of the project is to tune the selectivity of these complexes and to understand the catalytic processes in detail.

S. Bhattacharya, A. Allgaier, W. Frey, J. van Slageren, M. R. Buchmeiser 
Phenolate- and Alcoholate-Based Chromium N-Heterocyclic Carbene Complexes: Structural Peculiarities, Magnetometric and Electron Paramagnetic Resonance Study, and Catalytic Ethylene Oligomerization
Eur. J. Inorg. Chem., e70193 (2026).

A. Allgaier, F. R. Fischer, S. Bhattacharya, K. Balliet, M. R. Buchmeiser, M. Bauer, J. van Slageren 
Relevant Metal Oxidation States of MAO-Activated Chromium Catalysts for Ethylene Oligomerization
Inorg. Chem., (2026).

K. Jangid, L. A. Schmoltzi, A. Allgaier, R. Kataria,D. M. Wanner, J. Herrmann, J. Gschwind, S. Münch, J. van Slageren, J. Kästner, R. Peters  
Class-II-aldolase-mimicking polyfunctional Lewis acid/azolium–aryloxide catalysts in direct enantioselective nitro-aldol additions
Org. Chem. Front, (2026).

M. Amann, M. Drosou, T. Al Said, A. Allgaier, Y. Kutin, P.W. Antoni, J.J. Holstein, M. Kasanmascheff, J. van Slageren, A. Schnegg, D.A. Pantazis, M.M. Hansmann 
Triplet Metallovinylidenes of Palladium and Platinum Based on a Chelating P/Diazoalkene Ligand
Angew. Chem. Int. Ed., 65, e16032 (2026).

A. Bürstner, P. M. Becker, A. Allgaier, L Pfitzer, D. M. Wanner, J. Dollinger, F. Willig, J. Herrmann, V. Miskov-Pajic, A. C. Hans, W. Frey, J. van Slageren, J. Kästner, R. Peters  
Tunable Endo/Exo Selectivity in Direct Catalytic Asymmetric 1,3-Dipolar Cycloadditions with Polyfunctional Lewis Acid / Azolium–Aryloxide Catalysts
Angew. Chem. Int. Ed., 64, e202508024 (2025)

M. Benz, O. Bunjakua, M. Nowakowski, A. Allgaier, I. Biswas, J. van Slageren, M.s Bauer, D. P. Estes 
Hydrogen spillover through hydride transfer: the reaction of ZnO and ZrO2 with strong hydride donors
Catal. Sci. Technol., 14, 5854-5863 (2024)

J.O. Wenzel, J. Werner, A. Allgaier, J. van Slageren, I. Fernández, A.N. Unterreiner, F. Breher 
Visible-Light Activation of Diorganyl Bis(pyridylimino) Isoindolide Aluminum(III) Complexes and Their Organometallic Radical Reactivity
Angew. Chem. Int. Ed., 63, e202402885 (2024).

P.S. Ferreira, J.F. Malta, N. Bandeira, A. Allgaier, J. van Slageren, J.A. Paixão, M. Almeida, L.C.J. Pereira, P.T. Gomes
Enhancing SIM behaviour in a mononuclear tetrahedral [Co(N,N’-2-iminopyrrolyl)2] complex
Chem. Commun.58, 9682 – 9685 (2022)

P.S. Ferreira, A.C. Cerdeira, T.F.C. Cruz, N.A.G. Bandeira, D. Hunger, A. Allgaier, J. van Slageren, M. Almeida, L.C.J. Pereira, P.T. Gomes
Single-Ion Magnet behavior in homoleptic Co(II) complexes bearing 2-iminopyrrolyl ligands
Inorg. Chem. Front.9, 4302 – 4319 (2022)

M. Kern, L. Tesi, D. Neusser, N. Rußegger, M. Winkler, A. Allgaier, Y.M. Gross, S. Bechler, H.S. Funk, L.-T. Chang, J. Schulze, S. Ludwigs, J. van Slageren
Hybrid spintronic materials from conducting polymers with molecular quantum bits
Adv. Funct. Mater., 31, 2006882 (2021)

2021 - present

PhD Thesis

2021

Master's Thesis: Spin dynamics of P3HT based semiconductor films

2019 - 2021

Master student (chemistry) at the University of Stuttgart

2019

Bachelor's Thesis: Preparation and investigation of radical doped thin P3HT-films as potential qubit-system

2015 – 2019

Bachelor student (chemistry) at the University of Stuttgart

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