Metathesis@MOFs in ACS Catalysis!

Despite their record-braking sorption capacities, metal−organic frameworks (MOFs) have rarely been used for the immobilization of homogeneous catalysts by simple absorption from solution. Here we demonstrate that this simple strategy allows the first successful immobilization of olefin metathesis catalysts inside MOFs. Ruthenium alkylidene complexes bearing ammonium-tagged NHC ligands were successfully supported inside (Al)MIL-101-NH2·HCl. The materials thus obtained are true heterogeneous catalysts, active toward various substrates with TONs up to 8900 (in batch conditions) or 4700 (in continuous flow). Although the catalysts were held inside the MOF by noncovalent forces only, leaching was not observed and heavy metal contamination of the products was found to be below the detection limit of ICP MS (0.02 ppm). The robustness of the catalyst attachment allowed their use in a continuous flow setup.

Graphical Abstract - ChemComm 2015

Our first MOF paper has just appeared in ChemComm!

In our fist MOF paper we have described the first post-synthetic protection/deprotection method suitable for amino MOFs.

Graphical Abstract - ChemComm 2015

Welcome to the new Team member!

Dr Nicolai Nikishkin dołączył do naszego Zespołu po rekrutacji do projektu IDEAS PLUS. Witamy na pokładzie! Zobacz zdjęcia.Nicolai Nikishkin, PhD joined the group following recruitment to the IDEAS PLUS project. Welcome aboard! See pictures.

Sulfate anion is a pH-switchable template

SO42- is one of the priviledged anionic templates for the synthesis of catenanes, rotaxanes and other complex structures. Now we demonstrate that it can be “switched off” simply by protonation.
Graphical Abstract - EurJOC 2015

Positions available!

Several MSc, PhD and Postdoc positions are available at the moment. We also generally welcome temporary visitors.

If you are enthusiastic about our research and want to join our group, please send your CV, a one-page letter of motivation and contact details of two academic referees by email to Michal Chmielewski.

Applicants for MSc and PhD positions should also provide the transcripts of the marks received for their undergraduate and graduate degrees (for as far as completed).

Job offer for postdoctoral researchers within the grant IDEAS PLUS (in Polish)

Multivalency by self-assembly: postdoctoral work with Jean-Marie Lehn in Chem. Eur. J

Multiplication of functional units by self-assembly is a powerful way to new properties and functions. Self-organisation of components decorated with recognition groups leads to multivalent entities, amenable to strong and selective binding with multivalent targets, such as protein receptors. In this paper we describe an efficient, supramolecular, one-pot valency multiplication process proceeding through self-organisation of monovalent components into well-defined, grid-shaped [2×2] tetranuclear complexes bearing eight sugar residues for multivalent interaction with the tetrameric lectin, concanavalin A.
Concanavalin A

Prestigious award for our student!

Krzysztof Bąk, PhD student in our lab, has been honoured with Piotr Wrona award handed to the best graduates of Faculty of Chemistry, University of Warsaw.
The award was founded in memory of Professor Piotr Wrona who was an outstanding inorganic chemist and great teacher of the Faculty of Chemistry, University of Warsaw. Three factors are taken under consideration during selection of laureate: quality of MSc thesis, track records from studies and engagement in scientific work. Social work for benefit of the Faculty and society also plays an important role.
Well done!
Wrona Award

Our research in ChemComm!

Efficient binding of environmentally and biologically important sulfate anion in aqueous solutions remains difficult and only a handful of efficient neutral receptors has been reported to date.
Now we show that simple, easily available diamidocarbazoles form robust 2 : 1 complexes with sulfate anion even in the presence of a large excess of water. An appropriate choice of side arms directs the assembly towards the formation of either an orthogonal or a biplane structure, both in solution and in the solid state.
Graphical Abstract - Chem. Commun. 2014

We are looking for postdocs intersted in NCN fellowship

We are looking for prospective postdocs interested in joint application for post-doctoral fellowship from NCN (Poles only).
Wszystkich zainteresowanych stażem podoktorskim w moim Zespole zapraszam do wspólnej aplikacji o stypendium podoktorskie Narodowego Centrum Nauki pod nazwą FUGA 3.
Program ten jest adresowany do osób rozpoczynających karierę naukową, które uzyskały stopień naukowy doktora w latach 2009–2013, jak również do doktorantów, których stan zaawansowania rozprawy doktorskiej pozwala na uzyskanie stopnia naukowego doktora do dnia 30 czerwca 2014 r.
Czas trwania stypendium: od 12 do 36 m-cy, wynagrodzenie netto dla stażysty:

  • ok. 5500 zł netto miesięcznie w okresie od 1 do 12 miesiąca trwania stażu;
  • ok. 6000 zł netto miesięcznie w okresie od 13 do 24 miesiąca trwania stażu;
  • ok. 6500 zł netto miesięcznie w okresie od 25 do 36 miesiąca trwania stażu.

UWAGA! Aplikować mogą jedynie kandydaci spoza województwa mazowieckiego!

Deadline: 17 marca 2014 roku

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