lunduniversity.lu.se

Department of Chemistry

Lund University

Denna sida på svenska This page in English

The Wärnmark Group

The KW group during the annual group excursion, this time a hike from Knivsåsen to Skrylle. September 2022

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 (3MLCT) excited state by increasing the complex ligand field and destabilizing a low-lying metal-centered state (MC).

              

              Picture: Lisa A. Fredin, Front Cover ChemSusChem, 9(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

November 2022

Dnyaneshwar Kand has finished his work in the group. Thank you for your contribution and good luck in the future

October 2022

Lukas Ekberg has joined the group to do a 15 credit project. He will work with Samuel to make some iron complexes. Welcome and good luck!

September 2022

The group went on the annual group excursion. This year we hiked from Knivsåsen to Skrylle, with a lunchbreak in Torna Hällestad, enjoying the really nice autumn weather

Yogesh Goriya has finished his work in the group and has moved to the UK. The group enjoyed pizza together during Yogesh's last week. Thank you for your efforts and good luck in the future! 

Vicky Li has finished her work in the group and has moved back to China. Thank you for all your efforts and good memories. Good luck in your future!

Esmaeil finished his two months work. Thanks for your efforts and you are welcome back in the future!

Events

2022-12-06

Half-time presentation

Aleksandra Ilic will present her half-time report in a presentation titled:

"Investigation of Iron-N-Heterocyclic Carbene Complexes for Photocatalytic Applications"

Opponent: Vasudevan Subramaniyan

Time and Place: December 6 at 13:00 in CAS coffee room

2022-12-12

Half-time presentation

Jesper Schwarz will present his half-time report in a presentation titled:

"Applying Iron N-heterocyclic carbene complexes as photosensitisers and photoredox catalysts"

Opponent: Anders Reinholdt

Time and Place: December 12 at 15:15 in CAS coffee room

Funding

      

   

   

   

    

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