Arthur H. G. David

Exploring the Azabenzannulation of Benzothioxanthene Imide We report herein the synthesis and characterization of azabenzannulated benzothioxanthene imides (BTIs) functionalized with various appended aromatic units. This new class of polycyclic aromatic hydrocarbons is prepared via a straightforward and efficient synthetic strategy that involves a visible-light-mediated photocyclization of imines. The latter are formed in situ from the condensation of an amine moiety at the bay position of the BTI core with aldehydes, followed by oxidative rearomatization. These green-yellow fluorescent emitters (φf ∼ 0.14–0.20) combine dual redox properties with significant triplet state generation─resulting from a combination of strong spin–orbit coupling and the energetic proximity between their S1 and triplet states─with notable singlet oxygen sensitization efficiencies (φΔ ∼ 0.39–0.49). Hence, this design principle enables accessible, tailored structural modifications through the incorporation of diverse functional groups into the BTI core with minimal synthetic effort, paving the way to original and versatile functional materials with broad potential in optoelectronics, biophotonics, and photodynamic therapy.

Congratulations @arthurhgdavid.bsky.social for your work just published in the Journal of Organic Chemistry !
doi.org/10.1021/acs....
@agencerecherche.bsky.social @erc.europa.eu
@univangers.bsky.social y.social @eur-lumomat.bsky.social

Acid/Base‐Responsive Circularly Polarized Luminescence Emitters with Configurationally Stable Nitrogen Stereogenic Centers Circularly Polarized Luminescence (CPL) emitters based on Tröger's base analogues bearing two peripheral fluorophores (anthracene, pyrene or 9,9-dimethylfluorene) are prepared following a straightfor...

Now in an issue. Tröger's base derivatives are suitable chiral scaffolds to make CPL emitters by their functionalization with simple achiral fluorophores. Acid/base-driven CPL switching was also achieved.

advanced.onlinelibrary.wiley.com/doi/10.1002/...

What a better way to kick off my Bluesky account than sharing our latest work published in @materialsadvances.rsc.org!Don't miss these exciting acid/base responsive CPL emitters based on chiral Tröger's base analogs. @universidadgranada.bsky.social @nuchemistry.bsky.social

doi.org/10.1002/adma...

@cnrs.fr @chrono-env.bsky.social @univangers.bsky.social

A huge thank you to all co-authors for their talent, hard work, and great collaboration throughout this project:

Pablo García-Cerezo, Marcos D. Codesal, Seifallah Abid, @xuesongchem.bsky.social, @delia-miguel.bsky.social, Masoud Kazem-Rostami, Benoît Champagne, Araceli G. Campaña

We sadly lost Fraser during the revision of this work. His scientific insight, generosity, and encouragement were instrumental throughout this project. It was a privilege to work with him. We are deeply grateful.

New paper in Advanced Materials !
We report acid/base-responsive CPL emitters with stable N stereogenic centers based on Tröger’s base analogs.

With @laura-lb.bsky.social, J. Fraser Stoddart, @vb-chem.bsky.social

doi.org/10.1002/adma...

@universidadgranada.bsky.social @nuchemistry.bsky.social

A compact catenane with tuneable mechanical chirality - Nature Synthesis Catenanes can exhibit chirality even when their component rings are achiral. Here an isostructural desymmetrization strategy is developed, demonstrating that two achiral rings, each featuring two mirr...

Now online:

Article by Chun Tang, Ruihua Zhang & co-workers

A compact catenane with tuneable mechanical chirality

www.nature.com/articles/s44... ($)
#ChemSky

Thank you @antoinegoujon.bsky.social for giving me the opportunity to work on such exciting project! Let’s see what future holds for BACd polymers 😉

It is now online in @jacs.acspublications.org ! Congratulations to all authors and in particular @agapin.bsky.social and Elarbi Chatir for this long story that has been unfolding over 3 years. Read it here: doi.org/10.1021/jacs... @agencerecherche.bsky.social @erc.europa.eu @univangers.bsky.social

Rotaxanes and catenanes meet Circularly Polarized Luminescence! Check our review about this emerging topic in Chemistry Europe @chemistryeurope.bsky.social
doi.org/10.1002/ceur.2…
A collaboration between our MORFun group @universidadgranada.bsky.social and @arthurhgdavid.bsky.social from CNRS.

@universidadgranada.bsky.social
@iscr-rennes.bsky.social
@cnrs.fr

Curious about circularly polarized luminescence in rotaxanes & catenanes? Our latest review explores CPL in MIMs!

Proud to publish with Juan M. Cuerva and Victor Blanco in #ChemistryEurope (@chemistryeurope.bsky.social pe.bsky.social) !

doi.org/10.1002/ceur...

First post here: happy to share our latest preprint on the light-frozen dynamic covalent polymerization of BACDs: doi.org/10.26434/che.... Huge congrats to @agapin.bsky.social, Elarbi, and all collaborators! #PiSky 1/3

The French community of supramolecular chemists is very saddened by the passing of Sir Fraser Stoddart, whose legacy is extraordinary.
He's pictured here at the Supr@Lyon conference in 2018, an event that led to the creation of the Supr@SCF group.
Our condolences to the Familly.

If you are curious about photoresponsive foldamers and double helix formation, have a look at our last accepted paper in @ChemEurJ! We show that TPE can act as a photoacid and thus, trigger unfolding processes. Special congratulations to Louis Hardoin for his 1st 1st-author paper!
urlr.me/xF9u36

Me sitting next to Fraser with him typing something on his laptop sitting in front of him

Fraser wearing a Viking helmet and wielding an axe

Fraser smiling and giving two thumbs up

Fraser with his arms in the air and roaring in celebration when he found out he had hit 1,000 Twitter followers

I’ll miss gently berating him about how he could never organise files on his laptop and always had hundreds of files on his desktop. Fraser delivered my first chemistry lecture and the rest is history… I learned so much and owe him so much. RIP. chemistry.northwestern.edu/people/in-me... #Chemsky

Colleagues, Students, Postdocs, Collaborators and Friends of Sir Fraser Stoddart: I am writing with the sad news that Fraser passed away suddenly on 31 Dec (Australia time) while on holiday with family. No details yet on any services. He is irreplaceable.

It was an immense privilege to work with you, Fraser. You were an incredible mentor. Thank you deeply for everything you did for me. Rest in peace, Fraser.

I hope that the mirror-image cyclodextrin will win ! 😀 Fingers crossed !!! 🤞🤞🤞

Hey @arthurhgdavid.bsky.social ! 👋 Do you think one of the molecules you worked on should be the molecule of the year? That would be awesome! ➡️ mirror-image cyclodextrin

@sebvidalchem.bsky.social and @msollogoub.bsky.social any preference ? 😇 I'm just asking... 😏