A highly reactive chemical intermediate stabilised by weak interactions

Researchers at the CEISAM laboratory (CNRS/University of Nantes) and the Interdisciplinary Centre for Nanosciences in Marseille (CINaM, CNRS/Aix-Marseille University) have succeeded in stabilising a highly reactive reaction intermediate using weak intramolecular interactions. Known as the Meisenheimer complex, this negatively charged and highly reactive intermediate has long been recognised by chemists in aromatic nucleophilic substitution reactions....

Clémence Queffelec awarded the ARKEMA Prize from the Academy of Sciences

Clémence Queffelec, Senior Lecturer at Nantes University, at the Laboratory “Chemistry and Interdisciplinarity: Synthesis, Analysis, Modelling” (CEISAM), has been awarded the ARKEMA Prize by the French Academy of Sciences. The prize (€25,000), created in 2021, rewards decisive scientific advances in the development, characterisation, understanding or implementation of sustainable materials, i.e. materials whose life cycle and...

Pauline CRETIN: Collaboration US2B / AMaCC platform CEISAM

Pauline CRETIN (US2B; Molecular Engineering and Glycobiology Team) has defended her doctoral thesis entitled “Ecophysiology and importance of non-cyanobacterial marine diazotrophs (NCD)” on Friday, October 24, 2025. During her three years of doctoral research, Pauline studied diazotrophy using a model of non-cyanobacterial diazotrophic (NCD) bacteria. Monitoring of nitrogenase activity was carried out at the CEISAM...

CEISAM at the 2025 Science Festival

From 3rd to 13th October, the 2025 Science Festival took place with the theme ‘Intelligence(s)’ and once again, the CEISAM laboratory was there! Yann Pellegrin, accompanied by other members of the laboratory, ran a chemistry stand at the Science Village, focusing on silly mistakes in chemistry. They also visited the paediatric ward at Nantes University...

Tribute to Jean-Nicolas DUMEZ

It is with great sadness that we learned of the passing of Jean-Nicolas Dumez on August 18, 2025. Aged 41, he had been a researcher at the CNRS since 2013 and joined CEISAM five years later. Jean-Nicolas Dumez, studented at the ENS in Lyon from 2004 to 2008 and got the « agrégation » physical sciences, before...

Label « CNRS Platform » for CHEM-Symbiose platform

The CHEM-Symbiose platform is dedicated to the custom synthesis of small molecules. Since 2013, CHEM-Symbiose has applied its expertise for numerous academic partners through two main activities : service offers and research collaborations. Based in the CEISAM laboratory (UMR6230) at Nantes University, CHEM-Symbiose is labeled by IBiSA (Scientific Interest Group), the Biogenouest platform network, and...

Estelle LEBEGUE award winner Fulbright 2025-2026

Estelle Lebègue has been awarded a 2025-2026 Fulbright scholarship from the Franco-American Commission, in the category Chercheur National, to fund her mobility to the US (https://fulbright-france.org/fr/laureats-0). Her TOPSEE research project, which she will develop at the University of California at Santa Barbara (UCSB), in the group of Prof. Lior Sepunaru from March 17 to June...

Looking Back on the Pulsar Expedition at CEISAM – June 16, 2025

The @CEISAM laboratory (Nantes Université) welcomed researchers from the Pays de la Loire region taking part in the Pulsar 2025 cohort (@regionPaysDeLaLoire) for an inspiring afternoon filled with scientific exchange, discovery, and motivation ✨ On the agenda: 🔹 Introduction to regional and national research dynamics🔹 Workshops on international cooperation, CNRS programs, and ERC funding opportunities🔹...

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