Henrik Ottosson

Hand in a bookshop holding a hardcover book called Life after cars. It has a traffic sign yellow border and drawn cover art of a yellow traffic signal that has been overrun by vining and flowering plants.

I biked two blocks over to my local train depot and picked this gem up from the independent bookshop therein. It was a good place to imagine a #LifeAfterCars.

@thewaroncars.bsky.social

Quantum tunnelling drives aromaticity flip-flop Augmented pentalene structure could be a molecular Schrödinger's cat, aromatic and antiaromatic at the same time

Researchers have discovered molecules where individual rings can flip between aromatic and antiaromatic states so rapidly that they could exist in quantum superposition – creating a molecular equivalent of Schrödinger's cat.

This Chemistry World is covering the work of @kozuchsebastian.bsky.social, published in Chemical Science.

You can read the full paper here:
doi.org/10.1039/D5SC...

#ChemSky

Note: Several have had problems to pay the registration fee for participation at ICESAA-4. If you are among these, please note that it is possible to pay by card on-site. Further information is available at icesaa-4.in/registration New registration deadline is Oct 20.

In 1933, the Athens Charter set the stage for modern urbanism through zoning — a vision led by Le Corbusier.
That vision shaped cities around the world, but today we must rethink its legacy.
The city of the future must be connected and human-centered.

Canon.

Sharing new work. Now on @ChemicalScience on how geminal hyperconjugation affects heavy-atom tunneling! pubs.rsc.org/en/content/a...

Car-dependent suburban sprawl is the most publicly expensive, publicly subsidized, and publicly consequential form of human habitation in human history. #SuburbanSprawl #CarDependency

⏳ Don’t miss out! ICESAA-4 registration closes soon – secure your spot today and be part of cutting-edge science in action. 🔬✨Last date: Aug 30, 2025. Late registration closes: Sep 30, 2025. #ICESAA4 #ScienceConference #Research"

REMINDER of deadlines for ICESAA-4 in Kerala, India:
Early-bird registration deadline: Aug 30
Abstract submission deadline: Sept 15
Regular registration deadline: Sept 30
This is the conference to attend if you want to learn about excited state aromaticity & antiaromaticity, at a wonderful place!

“The guy Trump nominated to lead the Bureau of Labor Statistics at January 6, amazing scoop by Ryan Reilly”
(HT Aaron Fritschner)
www.nbcnews.com/politics/jus...

The same forces that have destroyed Sudan are coming for other countries, @anneapplebaum.bsky.social reports. Greed, nihilism, and transactionalism are reshaping the politics of the rich world—and as the liberal world order falls away, there’s nothing to replace it: https://theatln.tc/QFUVKQg3

Toward a Systematics for the Lowest Excited States of Heteroaromatics Enabled via Cyclic π-Conjugated Carbenes and Heteroelement Analogues The photochemistry of heteroaromatic compounds depends on the character of their lowest electronically excited states, which are of either n,π* or π,π* type. For species with 4n + 2 π-electrons, the l...

Now in the special issue on Physical Organic Chemistry of
J. Org. Chem.. We explore which factors determine whether a certain heteroaromatic compound has its first excited states (T1 & S1) of npi* or pipi* character, and identify six factors. More to follow!
pubs.acs.org/doi/10.1021/...

Chemistry artwork by Toma Bohmick

Super inspiring talk by Stefan Hecht. ”There is no applied science without science to apply”

Stable Tribrominated Phenalenyl Radical Exhibiting Long-Lived Luminescence from a Monomer−π-Dimer Equilibrium Open-shell organic radicals exhibit exceptional photophysical properties due to their unique electronic structures. Herein, we report the 2,5,8-tribromophenalenyl radical (Br-PLY) as a stable, emissive phenalenyl derivative. Br-PLY shows a monomer−π-dimer equilibrium in solution and emits light from its monomeric radical state. Its high air stability (t1/2 ≈ 40 h) and long-lived emission (τ = 252 ns) demonstrate the potential of phenalenyl radicals as promising luminescent materials beyond trityl-based systems.

Congratulations to our PostDoc Marvin on his newest publication from his time in the Kubo Lab! 🤩👨‍🔬
Read all about it below👇 #chemsky #pisky #postdoc

pubs.acs.org/doi/full/10....

Molecular belts can go SUPERCOILED! An amazing 24-benzene and 24-thiophene fused molecular belt with a plectonemic geometry.
x.com/kelong_zhu/s... #PiSky

Neo-Nazi group ‘actively seeking to grow in US’ with planned paramilitary training event The Base is emerging from shadows and ramping up its ranks as White House turns blind eye to the far right

Neo-nazi group with clear Russian links expands activity in the US
www.theguardian.com/us-news/2025...

Please read this. It’s really important.

Just submitted my first proposal to SIDA. Would be really inspiring if it gets funded!

The Stockholm Declaration on Chemistry for the Future was launched today: www.stockholm-declaration.org I believe this will be an important guiding document in years to come. Please read, sign, and share!

Congratulations to @miquelsola.bsky.social who has been awarded the prestigious @rseq-quimica.bsky.social Medal!

Last year, @henrikottosson.bsky.social, @jordipoater.bsky.social & Anton Stasyuk organized a Special Collection in honor of Prof. Solà with ChemEurJ - Read on: bit.ly/ChemEurJ_MSola 🧪

🔥 New and HOT in Chemical Science!

"Tuning Intramolecular Charge Transfer and Suppressing Rotations in Thianthrene Derivatives for Enhancement of Room-Temperature Phosphorescence" by Jiadong Zhou and Cong Liu et al.

Read it for free here: pubs.rsc.org/doi/D5S...

#ChemSky

This is the conference TO ATTEND if you are interested in excited state aromaticity & antiaromaticity. No surprise, A VERY IMPORTANT conference in my view!
Early next year at IISER-TVM in Kerala, India. For further info see icesaa-4.in

Join us for ICESAA-4, the 4th International Conference on Excited State Aromaticity & Antiaromaticity!
January 8–11, 2026, IISER Thiruvananthapuram, India.
#icesaa4
Website: www.icesaa-4.in
@henrikottosson.bsky.social
@maheshhariharan.bsky.social

what if Biden - who is actually Catholic - had done this? Or any politician anywhere on the planet, for that matter, while the church is still in mourning for the late Pope

YouTube video by Al Jazeera English Finland teaches media literacy to fight fake news and disinformation

Being able to identify hoaxes, avoid scams & debunk propaganda is a civic skill required in today's information society. That's why curriculum of students in Finland includes media literacy lessons, aimed at safeguarding a precious resource: the truth.

Click To Stack: Shape-Assisted Self-Assembly of Unflattened Macrocycles into Waveguiding Elastic Crystals Designing molecular crystals for practical applications requires precise control over intermolecular interactions. We report a click-to-stack strategy to enable facile construction and systematic stru...

Stacking flexible, saddle-shaped COTs pubs.acs.org/doi/10.1021/... #PiSky

Congratulations! @miquelsola.bsky.social receives the 2025 RSEQ Medal @rsequimica.bsky.social

#IQCCproud @univgirona.bsky.social @dimocat-iqcc.bsky.social

www.udg.edu/ca/instituts...

An argument for abandoning the “allowed” and “forbidden” classification of electrocyclic reactions The division of electrocyclic reactions into “allowed” and “forbidden” classes carries the implication that reactions of the latter class are so energetically penalised that they will occur only if their “allowed” alternatives are rendered effectively impossible. The present work tests that assumption, using

An argument for abandoning the “allowed” and “forbidden” classification of electrocyclic reactions
Edge article from Barry Carpenter (Cardiff University, UK)
doi.org/10.1039/D4SC...