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Positions and Theses

Bachelor´s theses and research internships



We offer positions for bachelor´s theses and research internships. Below is a selection of reseach fields and contact persons:

Field: Fluorine chemistry, superacids and strong oxidisers


(In)organic fluorine chemistry with mainly volatile compounds, catalytically or photochemically induced reactions of small molecules

Preparative work: inert work in vacuum, gas phase chemistry, Schlenk technique


In my field of research I am investigating strong methylation agents and superacids on the basis of teflate compounds. I am especially focusing on the synthesis of reactive cations, their stabilisation with weakly coordinating anions and their characterisation. Due to the high air and moisture sensibility of these substrates, working under inert gases as well as using Schlenk techniques is of high importance. If you are interested in this topic, you can send me an e-mail or visit me in my lab (room U409).


My research focuses on the study of gold fluorides in high oxidation states with organic substituents. Different substitution reactions shall be performed on those highly reactive compounds in order to enhance their scope of functionalizations.

In case you are interested in working under inert conditions, our working group and myself are the right place for you. If you are not afraid to work with extremely reactive compounds, such as elemental fluorine or anhydrous HF, you can get to know working techniques using a metal line and vessels made of PFA. Apart from the spectroscopic characterization (NMR, IR, Raman), QC calculations can be performed.

In case you are interested in doing your Bachelor’s thesis or a research internship with me I would love to hear from you. You can come to my office (room U408) or send me an e-mail (marlon.winter@fu-berlin.de). Depending on your preferences, the focus of the preparative work can be set onto one of the above mentioned techniques.



Field: Halogens (chlorine, bromine, iodine), polyhalides, electrochemistry and batteries


My research concerns the synthesis and characterisation of chlorine fluorine based polyhalide anions. Focus is put on their applications as reagents in organic and inorganic synthesis. Due to the high reactivity of some compounds involved (e.g. F2) working with Schlenk techniques is required.


  • Contact: Patrick Voßnacker

Around 75 million tons of elemental chlorine are produced each year. Due to the high reactivity and vapor pressure the storage of chlorine, for an extended period of time, is hardly possible. Therefore, I’m working on chemical chlorine storage materials which enable a save storage of chlorine. In addition, I’m interested in possible applications and reactivities of these storage materials. If you are interested in inorganic synthesis and unusual characterization methods (Raman, gas phase IR, XRD) please let me know or just come by my office in room U406.


My research is focused on the synthesis and characterization of novel ozonides and fluorobromates. In order to modulate their properties, different cations with e.g. perfluorinated groups have to be synthesized. If you are interested in a cross-over between inorganic fluorine chemistry and organic synthesis you are welcome to send me a mail or just come by in U412.



Field: Matrixisolationspectroscopy and quantumchemical calculations


I'm investigating novel transition metal species which I prepare by laser-ablation of metals at cryogenic tempratures at 4K. These metal atoms react with elemental fluorine or other reactive gases like OF2 to form so far unknown and very labile oxyfluoride species. These compounds will be isolated in solid neon or argon and characterized by matrix-isolation spectroscopy.


I am focusing on exploring novel reaction products from laser-ablated transition metal atoms with fluorine or other reactive gases in excess noble-gas matrices (Ne, Ar, etc.) under cryogenic conditions. The isolated species are detected by infrared matrix-isolation spectroscopy. Moreover, I make use of computational technique to analyze the molecular structures and orbitals of observed species.


Master´s theses


Master´s theses can also be taken in the above mentioned areas. Additionally, individually designed theses can be discussed.


For further information please contact members of the Riedel group (Fabeckstr. 34/36, 4th floor) or Prof. Sebastian Riedel.

PhD theses


Are you interested in a PhD theis in halogen and fluorine chemistry?

We are always looking for talented researchers for ambitious projects to synthesise novel compounds and tackle tricky questions.

Selection of fields:

  • compounds in high oxidation states
  • strong oxidiser
  • superacids
  • weakly coordinating anions/cations
  • polyhalogencations

For further information please contact members of the Riedel group (Fabeckstr. 34/36, 4th floor) or Prof. Sebastian Riedel.