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Reposted by Simon Pascal

FX Coudert @nanoporous.net · Sep 5

« Les coûts cachés de l'open [access] » — un bon résumé de la situation complexe, dans @themeta.news themeta.news/les-couts-ca...

Les coûts cachés de l’open — TheMetaNews

Pour les chercheur·ses qui viennent de terminer la rédaction d’un article après plusieurs mois, voire années, de dur labeur, c’est le moment très satisfaisant… de sortir la carte bleue. En effet, depu...

themeta.news

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Simon Pascal @pascalsci.bsky.social · Sep 2

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 · Aug 29

Thanks Tatiana !

Simon Pascal @pascalsci.bsky.social · Aug 26

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 · Jul 7

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 · Jun 27

Poke @d84ka.bsky.social

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Simon Pascal @pascalsci.bsky.social · Jun 27

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 · Mar 3

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

Simon Pascal @pascalsci.bsky.social · Feb 26

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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Simon Pascal @pascalsci.bsky.social · Feb 26

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)

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Reposted by Simon Pascal

Organic Chemistry Division from the SCF @scf-dco.bsky.social · Feb 12

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...

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

new.societechimiquedefrance.fr

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Reposted by Simon Pascal

Organic Chemistry Division from the SCF @scf-dco.bsky.social · Jan 28

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 · Jan 28

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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Simon Pascal @pascalsci.bsky.social · Jan 27

Hi Matthieu, I would be happy to join the group, thanks !

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Reposted by Simon Pascal

Kevin Cariou @cariouk.bsky.social · Dec 17

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...

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Reposted by Simon Pascal

Élise Antonetti @eantonetti.bsky.social · Dec 7

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 · Nov 16

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 · Nov 19

🤘🏼

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Simon Pascal @pascalsci.bsky.social · Nov 13

Here is a properly working link to access the review:
shorturl.at/N6bGl
Plus, it is on HAL !

Coupled Polymethine Dyes: Six Decades of Discoveries

This review delves into the coupling principle of polymethines, first introduced by Dähne and Leupold in 1966, which narrows the optical gap of coupled polymethine dyes. Compiling decades of research...

shorturl.at

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Simon Pascal @pascalsci.bsky.social · Nov 13

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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