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Yannick Geiger

@yannickgeiger.bsky.social

🇫🇷-🇩🇪 Systems chemist in Strasbourg (FR, systemschemistry-lab.chimie.unistra.fr). Chirality, (auto)catalysis, driven processes, supramol. assemblies, reaction & systems mechanisms. Also athletics, cooking & cinema.

31 Posts334 Follower75 Folgt
Omer Markovitch@omermarkovitch.bsky.social · 9mo ago

How to select primitive / synthetic replicators based their photocatalysis? Check out our manuscript just published in @natcatal.nature.com : www.nature.com/articles/s41... #OoL #Origins #Prebiotic #Evolution

Selection for photocatalytic function through Darwinian evolution of synthetic self-replicators - Nature Catalysis

Darwinian evolution has shaped life on our planet through natural selection. Here, the authors report on the combination of self-replication, mutation and protometabolism in an out-of-equilibrium abio...

nature.com

Alex Blokhuis@alexblokhuis.bsky.social · 12mo ago

Our new preprint 📑 about oscillating chemical reactions ⚗ just came out! arxiv.org/abs/2508.15273 We introduce tools 🛠️ that expand the scope of oscillators that can be analyzed, and use them to extract a lot of new qualitative and quantitative insights about oscillating chemical reactions! 1/3

Stoichiometric recipes for periodic oscillations in reaction networks

Oscillatory chemical reactions are functional components in a variety of biological contexts. In chemistry, the construction and identification of even rudimentary oscillators remain elusive and lack ...

arxiv.org

Joseph Moran@moranlabchem.bsky.social · 11mo ago

@uottawa.ca is hiring a Full Professor and Tier 1 CRC in Sustainable Catalyst Design. Ability to teach inorganic and organometallic chemistry especially welcome. Comes with dedicated funding, teaching reduction, and substantial startup funds. Ottawa is a great place to live! tinyurl.com/bdcm5hw6

Tier 1 Canada Research Chair in Sustainable Catalyst Design - Ottawa, Ontario (CA) job with University of Ottawa, Ontario CANADA | 12844053

The University of Ottawa invites applications for a Tier 1 Canada Research Chair (CRC) in Sustainable Catalyst Design. The successful candidate wil...

tinyurl.com

Yannick Geiger@yannickgeiger.bsky.social · last yr.

A post-doc position in a very nice group & institute (I was there just two weeks ago) - apply, especially if you look also for a long-term position!

Sebastien Ulrich@sebastienulrich.bsky.social · last yr.

WE RECRUIT: 18-month post-doctoral position + attractive salary + institutional support and training for grant applications. Research topic: dynamic combinatorial chemistry, peptides, and mechanochemistry. @ibmm-balard.bsky.social @umontpellier.bsky.social @fredlamaty.bsky.social

Yannick Geiger@yannickgeiger.bsky.social · last yr.

Super happy that this important issue has found its way to IUPAC. If you are, even remotely, concerned by out-of equilibrium systems and/or molecular machines, please read this article and answer the polls!

Chemistry World@chemistryworld.com · last yr.

The 2016 Nobel prize in chemistry was awarded 'for the design and synthesis of molecular machines'. Ironically, we do not know exactly what constitutes a molecular machine. With the ultimate goal of unifying definitions and standardising terminology, Iupac needs your help! #ChemSky #ScienceSky

Yannick Geiger@yannickgeiger.bsky.social · last yr.

First paper of Systems Chemistry Lab is out! Check out how Lunan achieved with @guillemonreals.bsky.social time-controlled formation and ageing of coacervates by using a volatile salt 👇 Congrats to all authors! pubs.acs.org/doi/10.1021/...

Timed Formation and Aging of Complex Coacervates Using a Volatile Salt

Biomolecular condensates are liquid droplets formed by liquid–liquid phase separation and play a role in a variety of cellular processes. In the past decade, there has been a growing interest in their...

pubs.acs.org

Yannick Geiger@yannickgeiger.bsky.social · last yr.

Woman belong into science as much as men do and deserve equal consideration and encouragement. Also in small daily things like how they are talked to. This testimony is really bewildering...

Adriana Guatame-García@guatamite.bsky.social · last yr.

A friend included this anti-acknowledgement section on her PhD thesis. She also added the proposition: “Systematic bullying and undermining of girls and women in STEM starts early on and is the reason why they do not stay in science and related fields.” Absurd we still need to go through this 🧪👩‍🔬

There have been people less than helpful in my journey here. I wanted to acknowledge those too, bc I know I am not unique in this experience. No thank you to the physics study assoc that made me sing songs about how women couldn't study physics without sleeping with the professor, the day I stepped into university life. No thank you to the 5th year physics student that decided to assign me a stripper name within the first minute of meeting me in the physics coffee corner in my first year. No thank you to the technician that was responsible for onboarding me on the use of the cluster in my third year who raised his eyebrows and asked me if that meant I was some sort of computer girl. No thank you to the senior researcher that sent me utterly inappropriate texts after a conference, then proceeded to apologise months later by telling me they had not been meant for me anyway so no hard feelings remain hopefully And no thank you to him for attending every conference I've been to since. No thank you to the people who told me that it was surprising that I was doing a PhD since I was a girl. No thank you to the man who mistook me for a coffee lady at a conference, and after having to correct him two times that I did not work there, responded with you should consider it. No thank you to the researcher that asked me what I was wearing underneath my outfit during a conference. No thank you to the physicist who declared to a room full of other physicists that biologists don't know how to design an experiment. No thank you to the people who have called me scary instead of strong and intimidating instead of intelligent. And finally, no thank you to the exec board of the TU Delft, whose knee-jerk reaction to being held up a mirror about the social safety at the university, was to sue the party holding up the mirror instead of looking at the problems they highlighted. ... You have made me feel like I do not belong in science & I cannot forgive you for that.
Groupe thématique chimie des origines@gt-chimie-origines.bsky.social · last yr.

Bonjour Bluesky! 👋 N'hésitez pas à vous abonner à ce compte si vous souhaitez avoir les dernières informations du groupe thématique "chimie des origines" rattaché à la Division de Chimie Organique de la SCF @scf-dco.bsky.social. Et visitez notre site web : sites.google.com/view/gt-chim...

GT Chimie des Origines

Le GT Chimie des Origines est un Groupe Thématique de la Société Chimique de France

sites.google.com

Yannick Geiger@yannickgeiger.bsky.social · 2y ago

Job alert⚡Come and work with me and Joseph! We're looking for someone with experience in electrochemistry to work as a postdoc in Strasbourg. You'll be on a cool project in a young and dynamic team 🙂

Joseph Moran@moranlabchem.bsky.social · 2y ago

@yannickgeiger.bsky.social and I are jointly looking to hire a postdoc in Strasbourg @unistra.fr with a strong background in electrochemistry to develop a new concept for CO2 fixation. The 18-month contract is funded by Syensqo. Start date as soon as possible.

Yannick Geiger@yannickgeiger.bsky.social · 2y ago

So glad this is out, congrats @alexblokhuis.bsky.social! Dimensionality analysis is going to be an unavoidable tool in mechanistic investigations of (presumably) complex chemical systems 🔥

Alex Blokhuis@alexblokhuis.bsky.social · 2y ago

Our companion paper was published for Christmas! ⛄🎄🧪, pdf: chemistry-europe.onlinelibrary.wiley.com/doi/pdf/10.1... We illustrate new tools we developed exploiting dimensional information in reaction monitoring data, opening up new ways of doing kinetic and mechanistic studies. #chemsky #chemistry

Claudia Bonfio@claudiabonfio.bsky.social · 2y ago

PhD alert! I have two ERC-funded PhD positions to uncover the chemical origins of life (Oct 2025). *UK fees only*. Projects described here: www.lclu.cam.ac.uk/studentship-... Email me if interested - deadline (PhD in Biochemistry, Uni of Cambridge): Jan 7th! Please share within your networks!

LCLU PhD Studentships | Leverhulme Centre for Life in the Universe

Applications are now open. The Leverhulme Centre for Life in the Universe and the University of Cambridge are committed to widening participation in postgraduate students at the University of Cambridg...

lclu.cam.ac.uk

Yannick Geiger@yannickgeiger.bsky.social · 2y ago

And now with a free read-only link, courtesy of Nat Chem: rdcu.be/d1S5C Check out how we got a beginning of Darwinian evolution with purely synthetic chemical systems!

Competitive exclusion among self-replicating molecules curtails the tendency of chemistry to diversify

Nature Chemistry - It is unclear whether Darwinian principles extend to chemistry and if they can direct chemistry to produce specific products. Now it has been shown that competition between...

rdcu.be

Yannick Geiger@yannickgeiger.bsky.social · 2y ago

And the last of 3 OttoLab papers within 24h! 🔥 Biological principles are valid only for biological systems? Don't bet on that. We found synthetic replicators literally dying out when in competition, or coexisting if they don't eat the same food. @naturechemistry.bsky.social doi.org/10.1038/s415...

Ivan Aprahamian@aprahamian.bsky.social · 2y ago

Considering the diverse backgrounds of my new followers, I'll share here a perspective I co-wrote with Steve Goldup about kinetic assymetry, and it's pivotal role in designing meaningful #out-of-equilibrium systems - including life itself! :) pubs.acs.org/doi/10.1021/... #ChemSky 🧪⚗️

Non-equilibrium Steady States in Catalysis, Molecular Motors, and Supramolecular Materials: Why Networks and Language Matter

All chemists are familiar with the idea that, at equilibrium steady state, the relative concentrations of species present in a system are predicted by the corresponding equilibrium constants, which are related to the free energy differences between the system components. There is also no net flux between species, no matter how complicated the reaction network. Achieving and harnessing non-equilibrium steady states, by coupling a reaction network to a second spontaneous chemical process, has been the subject of work in several disciplines, including the operation of molecular motors, the assembly of supramolecular materials, and strategies in enantioselective catalysis. We juxtapose these linked fields to highlight their common features and challenges as well as some common misconceptions that may be serving to stymie progress.

pubs.acs.org

Yannick Geiger@yannickgeiger.bsky.social · 2y ago

And the last of 3 OttoLab papers within 24h! 🔥 Biological principles are valid only for biological systems? Don't bet on that. We found synthetic replicators literally dying out when in competition, or coexisting if they don't eat the same food. @naturechemistry.bsky.social doi.org/10.1038/s415...

Competitive exclusion among self-replicating molecules curtails the tendency of chemistry to diversify - Nature Chemistry

It is unclear whether Darwinian principles extend to chemistry and if they can direct chemistry to produce specific products. Now it has been shown that competition between self-replicating molecules ...

nature.com

Yannick Geiger@yannickgeiger.bsky.social · 2y ago

OttoLab gone wild 2/3 🔥 And one more system where foldamers interconvert with fibers, this time pH-controlled. Means in turn: light-controlled if you use a photoacid. Congrats to Yulong, OttoLab and collaborators from Huc group in Munich! pubs.acs.org/doi/10.1021/...

Light-Mediated Interconversion between a Foldamer and a Self-Replicator

Self-replicating molecules and well-defined folded macromolecules are of great significance in the emergence and evolution of life. How they may interconnect and affect each other remains largely elusive. Here, we demonstrate an abiotic system where a single building block can oligomerize to yield either a self-replicating molecule or a foldamer. Specifically, agitation of a disulfide-based dynamic combinatorial library at moderately elevated pH channels it selectively into a self-replicating hexamer assembled into fibers, after passing through a period where a 15-subunit macrocyclic foldamer existed transiently. Without mechanoagitation or at lower pH, the formation of hexamer fiber is suppressed, resulting in the accumulation of the 15mer foldamer. Foldamer and self-replicator can be interconverted in response to external stimuli, including agitation and a change in pH. Furthermore, upon the addition of a photoacid, the pH of the medium can be controlled by irradiation, driving the switching between replicator and foldamer and allowing a dissipative out-of-equilibrium state to be accessed, using light as a source of energy.

pubs.acs.org