lunduniversity.lu.se

Department of Chemistry

Lund University

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The Wärnmark Group

                     

The Wärnmark Group, March 2017. Captured in the CAS conferense 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

July 2017

Algirdas has finished his 3 month stay with the group and has returned to Vilnius. We wish him all the best in the future and hope that we meet again soon.

Warm welcome to Lisa de Groot who will join the Tröger's Base project for a short summer project, followed by a whole year Master's project. 

August 2017

Max Lumetzberger has finished his 6 weeks stay in the group. We wish him all the best in the US and hope that we meet again soon.

Aleksander Sjörén has finished his summer project but has decided to stay in the group this semester and continue his work on Tröger's Base.

September 2017

Vicky Li has joined the group again after a short vacation. She will now start her PhD, working in the Supramolecular project. 

Warm welcome to Kumkum Sharma who has joined the group as a post-doctoral researcher. She will work on the Supramolecular project for 2 years.

Warm welcome to Nils Rosemann who has joined the group as a post-doctoral researcher. He will work in the Physical Chemistry department doing photochemistry for the group. 

Events

2017-11-06

Photocatalysis in Organic Synthesis

The whole group will travel to Mölndal and attend the one-day conference: Photocatalysis in Organic Synthesis.

Two posters about the iron carbene project will be presented. 

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