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L'Association Européenne de Cristallographie (ECA) organise depuis 2021 des "webinaires déjeuner". Les groupes d'intérêt spéciaux (SIG) et les groupes d'intérêt général (GIG) de l'ECA organisent à tour de rôle un webinaire adapté à la communauté des cristallographes au sens large. Le 21ième webinaire sera diffusé le jeudi 25 mai 2023 à 13h: Small molecular and crystal structure changes in MOFs leading to large differences in sorption and thermosalient properties par Clive Oliver  (University of Cape Town, Afrique du Sud). Inscriptions ici.

Metal-organic frameworks (MOFs) have attracted widespread attention for their porosity and applications in separation chemistry, catalysis, molecular sensing and gas storage. Mixed-ligand MOFs contain more than one type of ligand and offer the possibility of increased tailoring of structural features, such as chemical functionality or pore dimensions along particular directions. This talk will present a number of new MOFs constructed in our laboratory from commonly available ligands, which are often mixed-ligand MOFs, interpenetrated and show dynamic structural properties. Some of these MOFs are closely related in structure, in that they are isoreticular, yet show large differences in their thermal and sorption properties. In addition, an unexpected property of mechanical motion upon heating is revealed for one of the isoreticular MOF systems, a rare phenomenon for coordination polymers.


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