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Simon Pascal @pascalsci.bsky.social · 03/04/2026

22 dyes later, we changed the plan and finally report a bunch of new dicationic and neutral Acceptor–Donor–Acceptor dyes with neat electrochemical & photophysical properties. A joint study from CINaM (@univ-amu.fr) & CEISAM (@univ-amu.fr) labs, now in J. Org. Chem. (@acs.org): shorturl.at/C7iM3

General structures of dicationic and neutral acceptor-donor-acceptor dyes, surrounded by the various end groups they possess.

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Reposted by Simon Pascal

Dr. Hab Sophie Sacquin-Mora @sacquin-mo.eurosky.social · 25/11/2025

Petit rappel que les concours CNRS pour 2026 ouvrent dans 2 semaines, mais que c'est MAINTENANT qu'il faut rédiger votre projet de recherche. Parce que vous avez mieux à faire entre Noël et le jour de l'an (si si, je vous assure)

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Simon Pascal @pascalsci.bsky.social · 02/09/2025

Post-doctoral position at CEISAM lab in Nantes ! Join to synthesize near-infrared dyes and design next-gen solar cells, within the Connect Talent TRANSCEND project funded by Région Pays de la Loire, Nantes Métropole & @cnrs.fr. Deadline: Sept. 23rd Apply here: emploi.cnrs.fr/Offres/CDD/U...

Description of the post-doctoral position in molecular chemistry proposed by Dr S. Pascal at the CEISAM laboratory and funded by the Connect’ Talent program of the Pays de la Loire region.

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Simon Pascal @pascalsci.bsky.social · 26/08/2025

What began as an unexpected color change years ago led us to a rare discovery: a metastable macrocycle with two Meisenheimer adducts, fueled by cyanide and stabilized by H-bonds. A study from CINaM (@univ-amu.fr) & CEISAM (Nantes Univ), now OA in @angewandtechemie.bsky.social : tinyurl.com/a65eekm8

A tetranitroazacalixarene macrocycle captures cyanide reversibly via nucleophiloic aromatic substitution to form a metastable dianionic bis-Meisenheimer complex, with a color change of the solution from yellow to orange.

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Simon Pascal @pascalsci.bsky.social · 07/07/2025

New chapter in the coupled polymethines story: we explored anionic & neutral dyes, with exciting photophysics (e.g., pH-switching via spirocyclization of a dianionic species 🤯) A joint study from CINaM (@univ-amu.fr) & CEISAM (Nantes Univ) labs, now OA in @orgchemfront.rsc.org: tinyurl.com/58kudd4j

A colorfoul scheme of anionic coupled polymethine dyes and their neutral precursors, uncovering a range of exciting photophysical behaviors: including ESIPT, photoacid emission, and NIR pH-switching.

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Simon Pascal @pascalsci.bsky.social · 27/06/2025

Big congrats to Dr Yoann Cotelle (iSm2, Marseille) who brilliantly defended his HDR today, a great day for supramolecular chemistry, and a perfect reason to gather a remarkable jury !

Picture of the end of the HDR defense of Yoann Cotelle with the jury.

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Simon Pascal @pascalsci.bsky.social · 03/03/2025

Exciting research and now exciting news: Tatiana, who carried out most of this work, has just joined Bluesky! Follow her for more on quinones and dyes: @tatianamunteanu.bsky.social

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Simon Pascal @pascalsci.bsky.social · 26/02/2025

How far can we push quinones into the NIR while keeping them ultra-light? Our latest dye, synthesized by Tatiana Munteanu (CINaM, @univ-amu.fr) and modeled by Carmelo Naim (CEISAM, Nantes Univ.), reaches nearly 700 nm with MW < 300 Da! Read more: shorturl.at/dhlHM (@rsc.org & @orgbiomolchem.rsc.org)

Scheme of a far-red absorbing cationic benzoquinone diimine dye and plot of its absorption spectrum, with a picture of the dye dissolved in dichloromethane solution.

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Reposted by Simon Pascal

Organic Chemistry Division from the SCF @scf-dco.bsky.social · 12/02/2025

Vous souhaitez communiquer vos derniers résultats ? Visitez notre page consacrée aux manifestations en chimie organique organisées par la communauté française : new.societechimiquedefrance.fr/divisions/ch...

new.societechimiquedefrance.fr

Congrès - Société Chimique de France (SCF)

Afin de promouvoir au maximum la chimie organique française sous toutes ses formes, la DCO référence les manifestations scientifiques de notre communauté

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Organic Chemistry Division from the SCF @scf-dco.bsky.social · 28/01/2025

JCO are back!!! 29-31 October 2025 - Palaiseau - École Polytechnique. To know more visit our website : jco2025.com

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Simon Pascal @pascalsci.bsky.social · 28/01/2025

Our latest work explores new reactivities of benzoquinone-monoimines, including the one-step synthesis of bis-zwitterionic macrocycles via transamination. A joint study from @univ-amu.fr (CINaM), Nantes Université (CEISAM), & Univ. Politehnica of Bucharest. Here in J. Org. Chem.: shorturl.at/mUBii

This is the cover of the Journal J. Org. Chem. from January 2025. The cover juxtaposes the molecular structures of your bis-zwitterionic macrocycles against a stunning mountainous landscape, creating a striking symmetry. The molecular orbitals and bonds seem to mirror the rugged peaks and valleys of the mountains, suggesting a connection between the natural world and the precision of molecular design.

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Reposted by Simon Pascal

Kevin Cariou @cariouk.bsky.social · 17/12/2024

For fellow chemists, journals downgraded from level 1 to level 0 by the Finnish Publication Forum include: Molecules (the historical one), IJMS, Polymers or Cancers... see full list here: julkaisufoorumi.fi/sites/defaul...

julkaisufoorumi.fi

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Reposted by Simon Pascal

Élise Antonetti @eantonetti.bsky.social · 07/12/2024

Thèse soutenue ! Merci à toutes les personnes sans qui ça n'aurait pas été possible ☀️

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Reposted by Simon Pascal

FX Coudert @nanoporous.net · 16/11/2024

Chimistes 🇫🇷 : si vous êtes chimiste français ou francophone ou basé en France, et que vous voulez être ajouté à une petite liste de la communauté, faites signe 👋 bsky.app/profile/did:...

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Simon Pascal @pascalsci.bsky.social · 13/11/2024

Hi Bluesky, bringing some color your way ! To start, we dove into 60+ years of Coupled Polymethines research, piecing together the colorful puzzle of these remarkable dyes. Check out our review in The Chemical Record: shorturl.at/aYwg

Historical development of Coupled Polymethine Dyes and notable structures.

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