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Giovanni M. Beneventi

@gioben.bsky.social

Photochemist | PhD student in the Guldi Group @ FAU Exploring the photophysical and supramolecular properties of nanographenes. Previously with the Bert Meijer Group, Credi Group and Ceroni Group. Proud Unibo alum.

5 Posts243 Follower268 Folgt
Science Magazine@science.org · 7mo ago

In Science, researchers report a strategy to stabilize metal halide perovskites by coating them with layers of protective shells. This provides a practical route for using the material in displays under diverse operating environments. Learn more in this week's issue: https://scim.ag/4pHWBEZ

Colloidal perovskite nanocrystals offer exceptional color purity and efficiency but have long been limited by poor operational stability.
Giovanni M. Beneventi@gioben.bsky.social · 8mo ago

➡️ Increasing the length of molecular nanographenes leads to higher photoluminescence quantum yields!💡 In this @jacs.acspublications.org paper, we show how molecular length tunes the interplay between dark and bright excited states. 🔗 pubs.acs.org/doi/10.1021/... Many thanks to all coauthors!!

Synthesis and Excited-State Dynamics in Molecular Nanographene: Herzberg–Teller Vibronic Coupling and Energy Transfer to Porphyrins

Nanographenes (NGs) and graphene nanoribbons (GNRs) are molecular-level bridges to bulk-carbon materials. When synthesized with atomic precision via, for example, bottom-up strategies, a direct connection between the structure and properties is demonstrable. This is of key interest, especially considering practical applications. In the current work, we report the synthesis and comprehensive photophysical characterization of a full-benzenoid nanographene (NG-Br) and its covalent conjugate featuring a porphyrin (NG-(Zn)Por). Our synthetic approach relies on a cascade of Suzuki coupling, reduction, and Sandmeyer bromination reactions, starting from halogenated nitrobenzene derivatives. Knowing at which concentration aggregation occurs is important to study either monomers of NG-Br or its aggregates. In organic solvents, the association constant of NG-Br exceeds 1 × 106 M–1. Photophysical and theoretical analyses on the monomer revealed a subtle energy proximity between (S1)/(Lb) and (S2)/(La) that is the basis for strong vibronic coupling via the Herzberg–Teller mechanism, as well as (S1,1) and (S2,0) vibronic mixing. In NG-(Zn)Por, an ultrafast (S1–S1) energy transfer from NG to the porphyrin was observed. Our findings are essential for establishing an unambiguous structure–property relationship for NGs and 9-armchair GNRs, providing a blueprint for their use in optoelectronic devices ranging from single-electron transistors to OLEDs and organic solar cells.

pubs.acs.org

Alexandra T. Barth@alextbarth.bsky.social · 11mo ago

Use intramolecular electron transfer to make long-lived excited states out of short-lived LMCTs First Reactions article in ACS Central Science with @fncastellano.bsky.social, based on work by @ludotroian.bsky.social and @cadralab.bsky.social

Chasing Waterfalls: A Cascade Mechanism to Generate Triplets from <sup>2</sup>LMCT States

Earth-abundant ligand-to-metal charge transfer (LMCT) chromophores in donor–acceptor dyads unlock an electron transfer pathway for efficient triplet state formation.

pubs.acs.org

Alejandro Cadranel@cadralab.bsky.social · 11mo ago

Our recent publication in collaboration with with Felix, @ludotroian.bsky.social @gioben.bsky.social was highlighted in a First Reactions article in ACS Central Science by @alextbarth.bsky.social and @fncastellano.bsky.social ! Thanks a lot!! @fau.de @solarfau.bsky.social

Alexandra T. Barth@alextbarth.bsky.social · 11mo ago

Use intramolecular electron transfer to make long-lived excited states out of short-lived LMCTs First Reactions article in ACS Central Science with @fncastellano.bsky.social, based on work by @ludotroian.bsky.social and @cadralab.bsky.social

Giovanni M. Beneventi@gioben.bsky.social · last yr.

It was a great honor to receive the Early Career Researcher Lectureship Prize from the RSC Photophysics and Photochemistry Group! I had the chance to present my results on nanographenes at the Imperial College during the latest RSC meeting. Many thanks for the recognition and kind invitation!

Martijn Zwijnenburg@zwijcompchem.bsky.social · last yr.

Congratulations to Giovanni Benevento on winning the @rsc-photochem.bsky.social 2025 Early Career Researcher Lectureship Prize. #chemsky

A picture of Giovanni receiving the prize from the outgoing RSC PPG chair Prof. Zoe Pikramenou
Giovanni M. Beneventi@gioben.bsky.social · last yr.

Excited to be part of this work! Huge congrats to Phillip for his work on these incredible nanoribbons from @kokelab.bsky.social!

Phillip Greißel@phillipgreissel.bsky.social · last yr.

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/...

Guldi Group@guldi-group.bsky.social · last yr.

🥳 Last Tuesday, we celebrated Fasching in style with our traditional Bavarian breakfast—white sausages, pretzels 🥨, and Weizen 🍺. Also this year’s celebration we had a lots of amazing costumes, Alaaf! 🎭🎉

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Guldi Group@guldi-group.bsky.social · last yr.

Check out our latest work on a N-triangulene mixed-valence system, in collaboration with Prof. Kivala! 👏 Congrats to Simon, Marcel, and all co-authors! Read more: doi.org/10.1002/anie.202423516

Helically Chiral Mixed‐Valence Systems Comprising N‐Heterotriangulenes: Stabilization of the Cationic Species by π‐Expansion

[5]Helicene-bridged dimeric N-heterotriangulenes were synthesized. Their successive oxidation allowed the study of the electronic coupling between the nitrogen centers. The radical cation with its st....

doi.org

FAU Faculty of Sciences@nat.fau.de · last yr.

Solarzellen der Zukunft? ☀️🔋 Die FAU-Chemiker Phillip Greißel & Dominik Thiel erforschen, wie Solarzellen noch effizienter werden können. Ihre Erkenntnisse tragen dazu bei, die nachhaltige Energiegewinnung weiter zu verbessern! 🔬⚡ Mehr dazu im Interview: www.nat.fau.de/2025/02/07/p...

Photovoltaik: Grundlagenforschung mit hoher Relevanz

Momentan verbrennen wir noch große Mengen fossiler Energieträger wie Erdöl oder Kohle, um unseren Energiehunger zu stillen. Dabei entsteht das Treibhausgas Kohlendioxid, das in der Atmosphäre wie eine...

go.fau.de

Nature@nature.com · last yr.

Nature research paper: Two-dimensional polyaniline crystal with metallic out-of-plane conductivity https://go.nature.com/40LsmCt

Two-dimensional polyaniline crystal with metallic out-of-plane conductivity - Nature

A multilayer-stacked two-dimensional polyaniline crystal shows high electrical conductivity and unique out-of-plane metallic transport behaviour, indicating potential for strong electronic coupling beyond in-plane interactions and three-dimensional metallic conductivity.

go.nature.com

Sabine Richert@sabine-richert.bsky.social · 2y ago

Does supramolecular chemistry hold the key for the scale-up of molecular spin qubits? Very happy and proud to see this paper finally out in @naturechemistry.bsky.social. True teamwork with my favourite collaborator @avj-chem.bsky.social. www.nature.com/articles/s41...

Supramolecular dyads as photogenerated qubit candidates - Nature Chemistry

Molecular approaches in quantum information science are highly promising, but the synthesis and scale-up of suitable covalently linked moieties represent major challenges. Here it is demonstrated that...

nature.com