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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

December 2017

Warm welcome to Simon Kaufhold who has joined the group as a post-doctoral researcher. He will work on the Iron Carbene Project.

January 2018

Congratulations to Aleksander Sjörén for really impressive project work and presentation. We wish him all the best for the future.

We are delighted that Algirdas Neniškis will revisit our group for three months, from Vilnius University. He will work with Vicky and Kumkum on the supramolecular project. Welcome back.

Events

2018-01-26/27

Visions in Chemistry - The Torkil Holm Symposium 2018

Members in the group will attend the two-day conference: Visions in Chemistry.

"Experience a Nobel laureate and many other world-leading chemists present cutting edge research and future applications."

It will be held in Copenhagen 26-27th of January 2018.

2018-02-18 - 2018-02-21

Frontiers in Photochemistry Conference 2018

Valtýr will attend the four-day conference in Cancun, Mexico and give an oral presentation. 

https://www.fusion-conferences.com/conference63.php

The conference will focus on the frontiers (or cutting-edge) of research in the photochemical sciences. Topics to be discussed are:

  • Spintronics Photon
  • Fusion/Singlet Fission
  • Perovskites
  • Energy Transfer within Metal Organic Frameworks
  • Photo-acids/photo-bases and photo-proton transport

Time and Location: Cancun, Mexico; 18th-21st of February 2018

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