POLYMAT Spotlight

With 2024 as a highly successful year for ACS Materials Letters, this Collection showcases a selection of highly cited/downloaded content, papers that attracted wider media attention, and some recommended reading from our editorial team. Browse content 👉 go.acs.org/cfS

Out in @naturechemistry.bsky.social! Moiré 2D COF superlattices—synthesized straight from the monomers! 🤔2D polymer bilayers or bilayer 2D COFs? 🚀 Exciting collaborative work with @ZGaolei @yihanzhu @manuelmellelab.bsky.social @DeFeyterGroup and LohKP!
🔗 Read more: nature.com/articles/s41...

Out in @acs.org JACS! Intramolecular singlet fission in individual graphene nanoribbons: One graphene nanoribbon, two independent triplets! More here: pubs.acs.org/doi/epdf/10....

@polymat.bsky.social @guldi-group.bsky.social @manuelmellelab.bsky.social @phillipgreissel.bsky.social

Intramolecular Singlet Fission in Individual Graphene Nanoribbons─Competition with a Charge Transfer Graphene nanoribbons (NRs) constitute a versatile platform for developing novel materials, where their structure governs their optical, electronic, and magnetic properties while also shaping their excited-state dynamics. Here, we investigate a set of three twisted N-doped molecular NRs of increasing length, obtained by linearly fusing perylene diimide to pyrene and pyrazino- or thiadiazolo-quinoxaline residues. By employing various temperature-dependent time-resolved spectroscopy techniques, we reveal how the flexible twisted NR geometry promotes the formation of a mixed electronic state with varying contributions from locally excited and charge-transfer (CT) states. The fate of this mixed state is highly sensitive to the molecular geometry, length, and solvent polarity. For the shortest NR, intersystem crossing dominates the deactivation pathway, efficiently generating triplets in low-polarity solvents. In contrast, for the extended NRs, intramolecular singlet fission (SF) takes place within a single nanoribbon. This is enabled by enhanced superexchange coupling due to a pronounced push–pull nature and the existence of multiple localized π-electron states caused by heteroatom doping, thereby circumventing the need for dimeric interactions typically associated with conventional SF systems. In higher-polarity environments, evidence of a (diabatic) CT state emerges. These findings underscore the intricate relationship between geometry, energy levels, and excited-state dynamics in twisted N-doped NRs.

Happy to share our latest JACS publication on twisted molecular nanoribbons! Our study reveals that both external factors and ribbon length greatly influence their deactivation—longer ribbons even enable intramolecular singlet fission. Many thanks to everyone involved! pubs.acs.org/doi/10.1021/...

Out in @angewandtechemie.bsky.social! Introducing Joa-COF-1: a wavy mesoporous 2D COF with a 6-nm hexagonal pore lattice! Sonication unlocks its tubular nature! Details here: onlinelibrary.wiley.com/doi/10.1002/...

@polymat.bsky.social @manuelmellelab.bsky.social

Moiré two-dimensional covalent organic framework superlattices - Nature Chemistry On-surface synthesis of two-dimensional polymers is a useful strategy for designing the lattice, orbital and spin symmetries of materials, but controlling their layer stacking remains challenging. Now...

Moiré two-dimensional covalent organic framework superlattices, from Kian Ping Loh, Steven De Feyter, Yihan Zhu, Gaolei Zhan, and their team:
www.nature.com/articles/s41...
#chemsky

🚀 Check out this short video where we break down the results of our latest work published in @natchem.nature.com:
📄 www.nature.com/articles/s41...
#ScienceCommunication @ec.europa.eu @ageinves.bsky.social @fct_pt @fwovlaanderen.bsky.social @cdti-innovacion.bsky.social

Out in Organic Letters! Substituent flexibility controls AIE behaviour in tetraphenylbenzene! pubs.acs.org/doi/10.1021/... #OpenAccess @polymat.bsky.social

Out in @J_A_C_S @pubs.acs.org! Using overcrowded polycyclic aromatic hydrocarbons as monomers leads to the formation of mechanically interlocked 🔗 2D #COFs! Discover more 👉https://pubs.acs.org/doi/10.1021/jacs.4c14453👈 @polymat.bsky.social @manuelmellelab.bsky.social @brentnannenga.bsky.social

This is the complete speaker line-up for POLYMAT Spotlight 2026!
29 June – 2 July, 2026 hashtag#POLYMATsptl
More details at: polymat-spotlight.eu

This is the complete speaker line-up for POLYMAT Spotlight 2026!
29 June – 2 July, 2026 hashtag#POLYMATsptl
More details at: polymat-spotlight.eu

There is a predoctoral position available in my group. Details here (www.polymat.eu/uploads/open...) and below.

A photograph of a red, vaguely boat-shaped crystal in a test tube under ultraviolet light.

Federico Begato studies carbon-based nanoribbons. The material in this particular crystal is based on perylene bisimide, a fluorescent dye often used to construct molecular electronics and nanomaterials. Read more: cen.acs.org/materials/na...

#CENChemPics #FluorescenceFriday #chemsky 🧪

The invited speaker line-up for POLYMAT Spotlight 2026 is now complete!

📅 29 June – 2 July, 2026 | 🌐#POLYMATsptl
🔗 polymat-spotlight.eu

The invited speaker line-up for POLYMAT Spotlight 2026 is now complete!

📅 29 June – 2 July, 2026 | 🌐#POLYMATsptl
🔗 polymat-spotlight.eu

Guven the notable exodus: Let's gather the family once more🤩I have started a (currently very small) #starterpack of PIs and Lab Heads revolving around #Polyaromatic #Chemistry #ISNA #CuroPi. Happy to add you and (regrow) the gang here where the sky is blue☀️ 🧪 #chemsky
go.bsky.app/241xcWx

The first articles of the thematic issue “π-Conjugated molecules and materials” edited by Chunyan Chi, National University of Singapore, and Aurelio Mateo-Alonso, @kokelab, POLYMAT, San Sebastián, in the #BJOC 💎🔓 are online:

🔗 […]

[Original post on hessen.social]

Out in Chemical Science! Cathodes formulated with a [3+6] trigonal prismatic cage constituted by three redox-active dibenzotetraazahexacene subunits show enhanced performance! #openaccess 👉 pubs.rsc.org/en/content/a...

POLYMAT Join the conversation

go.bsky.app/SQoQYAX

As I'm still starting with Bluesky, I thought that I would create a porous materials starter pack. Let me know if you want to be added or taken off this list.
go.bsky.app/BUK9LWE