News

Prospective candidates for post-doctoral researchers are invited to jointly apply for prestigious Ulam fellowships

Outstanding candidates for post-doctoral researchers in either MOF or supramolecular chemistry are sought for joint application for prestigious Ulam fellowships from the Polish National Agency for Academic Exchange. Ulam fellowships allow scientists from abroad to work in leading Polish research institutions for 6 to 24 months. Successful candidates will get 10000 PLN net per month + mobility allowance.

The call for proposals is open untill 23rd April 2019, so the prospective candidates are encouraged to contact me as soon as possible.

The most important conditions for application are:

  • doctoral degree awarded in a country other than Poland;
  • not being a Polish citizen (The condition does not apply to persons whose full cycle of doctoral studies abroad has been financed by the Polish government);
  • employment (contract) in a foreign HEI or a foreign scientific/research centre. The employment is not required for persons who obtained their doctoral degree after 31.08.2018 or completed their previous post-doctoral fellowship after 31.08.2018
  • the candidates who a) lived, studied or worked in Poland from 01.01.2017 until 23.04.2019 or b) managed a research project carried out in the Polish institutions of science and higher education are not eligible,
  • at least 3 achievements in the years 2016-2019. The achievement might be publications as the main author (especially first or correspondence) in journals included in Scopus or Science Citation Index Expanded, publications in reviewed materials from international conferences indexed in the Web of Science Core Collection or Scopus or reviewed research monographs.

For details see: https://nawa.gov.pl/en/scientists/the-ulam-programme

PhD and MSc positions available!

PhD and MSc positions are available within ‘OPUS’ grant from the Polish National Science Centre. The aim of the project is to create a revolutionary new class of ‘intelligent’ MOFs, able to adapt to their environment in response to external physical or chemical stimuli (see the scheme below).

Dynamofs

We offer:

  • an opportunity to participate in a ground breaking and interdisciplinary research project run in collaboration with leading MOF laboratories (MIT, Augsburg University),
  • good chance for prestigious publications in leading scientific journals,
  • state-of-the-art research facilities: Supramolecular Chemistry Laboratory is located in a new, modern building of Biological and Chemical Research Centre. For pictures see: Gallery,
  • supportive 6-membered team composed of PI (MCh), 1 postdoctoral researcher with many years of experience in the field, 2 PhD students and 2 MSc students,
  • generous fellowships

More details will be sent to interested candidates after receiving their CVs. Inquiries and CVs should be sent to: mchmielewski@chem.uw.edu.pl

We have developed the first photoswitchable ion-pair receptor

How to kill two binding sites with one photoswitch? Check it out in our newest communication in JACS!

Graphical Abstract JACS 2018

We have discovered a new family of highly active anion transporters through lipid bilayers and sensitive turn-ON fluorescent anion sensors

Simple and easy to make diamidocarbazoles have been shown to be highly active anion transporters through lipid bilayers and sensitive turn-ON fluorescent sensors for H2PO4- and AcO-. See our newest paper in OBC:

Graphical Abstract

Scholarship of Ministry of Science and Higher Education awarded to our student!

Krystyna Masłowska, a master student in our lab, was awarded with the Scholarship of Ministry of Science and Higher Education for the outstanding achievements during her studies.

Congratulations!

Free radicals@MOFs

Metal-organic frameworks (MOFs) decorated with stable organic radicals are highly promising materials for redox catalysis. Unfortunately however, the synthesis of chemically robust MOFs typically requires harsh solvothermal conditions, which are not compatible with organic radicals. Here we describe the synthesis of two isoreticular families of stable, mixed-component, zirconium MOFs with UiO-66 and UiO-67 structure and controlled amounts of covalently attached TEMPO radicals. The materials were obtained using a relatively low-temperature, HCl-modulated de novo method developed by Hupp and Farha and shown to contain large amounts of missing cluster defects, forming nanodomains of reo phase with 8-connected clusters. In the extreme case of homoleptic UiO-67-TEMPO(100%), the material exists as an almost pure reo phase. Large voids due to missing clusters and linkers allowed these materials to accommodate up to 2 times more of bulky TEMPO substituents than theoretically predicted for the idealized structures and proved to be beneficial for catalytic activity. The TEMPO-appended MOFs were shown to be highly active and recyclable catalysts for selective aerobic oxidation of a broad range of primary and secondary alcohols under exceptionally mild conditions (RT, atmospheric pressure of air). The influence of various parameters, including pore size and TEMPO content, on the catalytic activity was also comprehensively investigated.

Graphical Abstract - ACS AMI 2017

Deamination of MOFs

A versatile method for the post-synthetic removal of primary amino groups from metal-organic frameworks (MOFs) has been developed. The method allowed the first successful synthesis of the missing parent compound of an important family of MOFs – the unsubstituted (Al)MIL-101. The material was shown to be a useful reference compound for the elucidation of the role of amino groups in the adsorption and deactivation of olefin metathesis catalysts. The chemoselectivity of the deamination is sufficient for the selective removal of NH2 substituents from mixed-linker MOFs bearing both NH2 and RCONH groups.

Graphical Abstract - ChemComm 2017

Two new papers: in OBC and in Electrochimica Acta

Joining together two diamidocarbazole moieties with a flexible linker led to a selective fluorescent sensor for an extremely hydrophilic sulfate anion, which works even in the presence of 25% of water! It allowed sulfate detection in real world samples, such as mineral waters, which contain many other anions. See more.

Graphical Abstract - OBC 2017

Diaminocarbazole was also used to construct a new catalytic system, composed of bimetallic Au@Pt nanoparticles dispersed in a conducting polymer. Our new organic-inorganic hybrid system shows enhanced activity towards formic acid electrooxidation. See more.

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

Position available!

Post-doc position available in IDEAS PLUS project!