The Willitsch Group - Cold and Controlled Molecules and Ions

Welcome to the Cold and Controlled Molecules and Ions group at the University of Basel led by Prof. Stefan Willitsch. Our research is concerned with the preparation and control of cold molecules and molecular ions and their applications in both chemistry and physics. On this website, you can find information about our group, our research, our teaching and opportunities to join us.

Recent news


We have realised a nationwide network for ultrahigh- precision molecular spectroscopy by distributing the Swiss primary frequency standard to laboratories all over Switzerlerand. Read our article and the University of Basel press release.

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Our group


Open positions

Recent publications

L. Ploenes, P. Straňák, H. Gao, J. Küpper and S. Willitsch,
”A novel crossed-molecular-beam experiment for investigating reactions of state- and conformationally selected strong-field-seeking molecules”
Mol. Phys. 119 (2021), e1965234 (arxiv: 2105.06427)

A. Kilaj, J. Wang, P. Straňák, M. Schwilk, U. Rivero, L. Xu, O. A v. Lilienfeld, J. Küpper, and S. Willitsch,
”Conformer-specific polar cycloaddition of dibromobutadiene with trapped propene ions”

U. Rivero, H. T. Turan, M. Meuwly and S. Willitsch,
”Reactive atomistic simulations of Diels-Alder-type reactions: Conformational and dynamic effects in the polar cycloaddition of 2,3-dibromobutadiene radical ions with maleic anhydride”
Mol. Phys. 119 (2021), e1825852 (arXiv 2010.00464

J. Wang, A. Kilaj, L. He, K. Dlugolecki, S. Willitsch and J. Küpper,
”Spatial separation of the conformers of methyl vinyl ketone”
J. Phys. Chem. A 124 (2020), 8341 (arxiv 2006.16299)

K. Najafian, Z. Meir, M. Sinhal and S. Willitsch,
"Identification of molecular quantum states using phase-sensitive forces”
Nat. Commun. 11 (2020), 4470 (arXiv 2004.05306

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