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Department of Chemistry

Lund University

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The Wärnmark Group

     Enthusiasm • Excellence • Respect
         Responsibility • Transparency 

                   

The Wärnmark Group, March 2017. Captured in the CAS conference room

Research - Main Fields

Currently, Iron Carbene Sensitizers are a big part of research in our group, where the electronic properties of iron complexes are studied and adjusted. Using strongly σ-donating N-heterocyclic carbene (NHC) ligands, the aim is to alter the energy of electronic states in iron complexes, making them potential candidates as photosensitizers in solar cells. Because of abundance and availability of iron, replacing the widely employed, scarce, ruthenium and iridium-based complexes is an exciting prospect. The challenge is to extend the lifetime of a short-lived triplet metal-to-ligand charge transfer (3MLCTexcited state by increasing the complex ligand field and destabilizing a low-lying metal-centered state (MC).

                    

               Picture: Dr. Lisa A. Fredin, Front Cover ChemSusChem 7/2016

Another project is within the field of Supramolecular Chemistry - the chemistry beyond the molecule. This means that we are using non-covalent interactions between molecules, mainly hydrogen bonds, to construct assemblies of molecules that should have new properties that are more than the sum of the individual molecules. Self-assembly is used in Nature to build up organs such as the brain from smaller components. In our group we use advanced organic chemistry to covalently build up the molecules (building blocks) we want to assemble by non-covalent interactions after designing the molecules with respect to hydrogen-bonding pattern and their spatial positions to form the desired aggregate. For this purpose we use molecular modeling and quantum mechanical calculations. Characterization of the so formed assembles in solution is challenging and a lot of effort is devoted to apply and to develop methods for their characterization, some involving advanced mathematics.

                     

               Picture: Dovilė Račkauskaitė, Front Cover JACS 33/2015

Group News

June 2018

Samuel Persson has joined the group for a 2 month summer work. He will work with Olga on the Iron Carbene project. Welcome.

Lisa de Groot has started her PhD work in the group. She will work on the Photocatalysis project. Congratulations and welcome back.

May 2018

Alexander Braune has joined the group for a 1 month summer work on the Tröger's Base project. Welcome.

In July, we will welcome a new post-doc. Hao Fan will join us from the Elena Galoppini group and work on the Iron Carbene project.

Events

2018-06-17 - 2018-06-20

1st National meeting of the Swedish Chemical Society (SCS-2018)

The whole group will attend this 4 day conference. Olga has been chosen to give oral presentation of the Iron Carbene project, while several posters will be presented by the group.

The conference will be held in Lund from 17th to 20th of June 2018, with sessions being held in the mathematical building of Lund University.

2018-06-24 - 2018-06-28

First European Congress on Photosynthesis Research (ePS-1 / ePS-1-Young)

Om, Simon and Valtýr will attend the conference and present the Iron Carbene project. 

It will be held in Uppsala, starting after Midsommar, on the 24th of June until 28th of June.

 

 

Contact

Kenneth Wärnmark

Professor

E-mail:

kenneth.warnmark@chem.lu.se

Phone:

+46 (0)46-222 82 17

Postal address:

Lund University

Center for analysis and synthesis (CAS)

P.O. Box 124

SE-221 00 Lund

Sweden

Visiting address:

Kemicentrum

Naturvetarvägen 14

Lund

Internal mail:

Pick-up location 1