IN-PERSON EVENT - REGISTER HERE \;to attend
\nBy Dr \; Gaëlle Le Fer\, \;University of Lille\, CNRS\, INRAE\, Lille \, France
\nAbstract: \;
\nCovalent orga
nic frameworks (COFs) are crystalline porous materials whose topology and
pore size can be precisely programmed through the molecular design of thei
r building blocks.1\,2 A central challenge is to extend this mo
lecular programmability to larger length scales\, where crystal orientatio
n\, particle architecture and collective organization determine how the in
trinsic properties of COFs can be translated into functional materials.
Our approach combines reticular chemistry and macromolec ular chemistry\, using linear polymers as active vectors of supramolecular organization. Rather than simply acting as additives\, the polymers inter act with COF building blocks\, modulating nucleation\, crystal growth\, an d the assembly of crystalline domains. Through these interactions\, they c an shape COF organization across multiple length scales\, from local molec ular organization to crystal orientation and particle morphology. This app roach has enabled us to access different COF particle architectures\, incl uding raspberry-like particles with radial crystal orientation4 and hollow spheres with porous membranes.5 These hollow archit ectures provide a direct link between structure and function: their porous membranes can regulate molecular transport\, allowing the particles to op erate as size-selective microreactors. We also highlighted the potential o f these hollow COF particles to reorganize within polymer gels into elonga ted micrometer-scale tubular structures\, revealing a new level of hierarc hical organization.
\nOverall\, these results show how polymers can guide COF organization from crystal growth to particle assembly. More broa dly\, they show that COFs are not only static porous solids\, but can also behave as dynamic systems capable of evolving and reorganizing in respons e to their environment. This dynamic behavior opens new opportunities for COF-based materials with adaptive properties.
\nReferences:
\nShort bio:
\nGaëlle Le Fer is a CNRS researcher since 2020 \, in the “Unité Matériaux et Transformations” (UMR 8207) in Lille\, France. In 2015\, she obtained a PhD in chemistry (Université Paris-Est) at the Institut de Chimie et des Matériaux Paris-Est (UMR 7182). Her PhD thesis was focused on the development of polymer nanoparticles. Following her interest in polymer self-assembly\, she joined the group of Prof. Sé bastien Lecommandoux at the Laboratoire de Chimie des Polymères Organique s (UMR 5629) for a 2-year post-doctorate. Then\, she moved to the Prof. Ma tthew Becker’s group at the University of Akron\, USA\, for a second 2-y ear postdoc. She designed and characterized 3D-printed porous shape-memory materials. Currently\, she is developing her own topic on materials combi ning both COFs and polymers. She supervised three PhD students and four po stdocs\, was the coordinator of one ANR\, one international chair with Ghe nt University (Belgium) and one CNRS-Emergence project.
\nHo sted by \;ICREA Prof. Daniel Maspoch\, Group Leader\, Sup ramolecular Nanochemistry ans Materials \;group at ICN2.
\n\;
DTSTART:20261030T110000 DTEND:20261030T225959 LOCATION:UAB Sala Graus Facultad de Ciències i Biociències CATEGORIES:ICN2 Seminars END:VEVENT END:VCALENDAR