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Angelo Frei

@angelofrei

Medicinal Inorganic Chemistry Group Leader SNSF Ambizione Fellow 2024- Lecturer in Chemistry, University of York (UK) Dog Dad, Space Nerd, DnD Enthusiast

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16.10.2023
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Latest posts by Angelo Frei @angelofrei

Congratulations to both for securing one in such a competitive round!

13.02.2026 09:24 πŸ‘ 3 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Reactive Oxygen Species Detection with Fluorescent Probes: Limitations and Recommendations beyond DCFH-DA Reactive oxygen species (ROS) are highly reactive molecules derived from molecular oxygen that play critical roles in cellular signaling, homeostasis, and the regulation of various physiological and pathological processes. Accurate detection and quantification of ROS are essential for elucidating their roles in health and disease. Despite significant advances in ROS probe development, challenges persist due to their short lifetimes, high reactivity, and their chemical diversity. This perspective article provides a critical evaluation of the limitations of the most commonly applied probe molecule DCFH-DA. Capitalizing on this, recommendations with practical applications in the lab for the specific detection of hydrogen peroxide, hydroxyl radical, singlet oxygen, superoxide anion, and peroxynitrite are provided. By integrating current knowledge on ROS probe technologies, this work aims to guide researchers in reliably assessing ROS in complex biological systems, thereby facilitating a deeper understanding of ROS-mediated processes and their implications for disease research and therapeutic development.

Check out our perspective in J. Med. Chem. @acsmedi.bsky.social about the Limitations of DCFH-DA for the Detection of ROS and Recommendations for Probe Selection. @ruhr-uni-bochum.de dx.doi.org/10.1021/acs....

03.02.2026 07:45 πŸ‘ 15 πŸ” 4 πŸ’¬ 0 πŸ“Œ 1
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I have been experimenting with a lot of different materials for my biomolecules lately, but I always come back to the gummy-worm-style πŸ›

Protein colored by b-factor / rendered in Blender / pdb struktur loaded with #molecularnodes

#blender3d #scientificillustration

02.02.2026 16:52 πŸ‘ 11 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0

wow...

31.01.2026 19:18 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Molecular‐Scale Tuning of Low‐Molecular‐Weight Gelators Controls Supramolecular Assembly and Directs Human Mesenchymal Stem Cell Growth Chemistry in charge of biology! Simple low-molecular-weight gelators, with minor modifications in molecular structure, self-assemble differently and can also co-assemble when simultaneously triggered...

In this new paper, simple chemistry controls how stem cells grow on commercially viable molecular gel scaffolds. Such materials have potential applications in regenerative medicine to direct the creation of new tissue and help the human body repair itself.
onlinelibrary.wiley.com/doi/10.1002/...

27.01.2026 09:23 πŸ‘ 10 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

This is a wild story

23.01.2026 07:41 πŸ‘ 22 πŸ” 6 πŸ’¬ 5 πŸ“Œ 1
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We've got ISSUES. Literally.

We scraped >100k special issues & over 1 million articles to bring you a PISS-poor paper. We quantify just how many excess papers are published by guest editors abusing special issues to boost their CVs. How bad is it & what can we do?

arxiv.org/abs/2601.07563

A 🧡 1/n

13.01.2026 08:24 πŸ‘ 505 πŸ” 314 πŸ’¬ 17 πŸ“Œ 49
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How did @Nature become "prestigious" to scientists?

In our opening article of Issue 09, writer Robert Reason traces the journal's history.

By understanding how Nature’s prestige was constructed, we can also clarify which elements are deserved and which are entrenched.

05.01.2026 16:14 πŸ‘ 35 πŸ” 16 πŸ’¬ 1 πŸ“Œ 2
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The Mentos challenge just got serious 🧐 See what happens when chem prof Tom Kuntzleman dds Mentos to a bottle of champagne in comparison to a different carbonated beverage. Cheers! #wsuchemistry #ChemSky #mentoschallenge #ChemEd

06.01.2026 20:34 πŸ‘ 20 πŸ” 7 πŸ’¬ 2 πŸ“Œ 3
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A Gold-PROTAC Degrades the Oncogenic Tyrosine Kinase MERTK: Insights into the Degradome from a Steady-State System Proteolysis targeting chimeras (PROTACs) are bifunctional molecules designed to induce the degradation of specific proteins within a cell. While most PROTACs are noncovalent interactors, covalent PROT...

A Gold-PROTAC Degrades the Oncogenic Tyrosine Kinase MERTK: Insights into the Degradome from a Steady-State System | ACS Chemical Biology pubs.acs.org/doi/10.1021/...

05.01.2026 09:03 πŸ‘ 10 πŸ” 3 πŸ’¬ 0 πŸ“Œ 1
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RESEARCHERS USE ROBOTICS TO FIND POTENTIAL NEW ANTIBIOTIC AMONG HUNDREDS OF METAL COMPLEXES Researchers have used a cutting-edge robotic system capable of synthesising hundreds of metal complexes to develop a possible antibiotic candidate - offering fresh hope in the global fight against dru...

Researchers use robotics to find potential new antibiotic among hundreds of metal complexes.

Dr Angelo Frei and his team have used a cutting-edge robotic system capable of synthesising hundreds of metal complexes to develop a possible antibiotic candidate.

www.york.ac.uk/chemistry/ab...

30.12.2025 07:33 πŸ‘ 2 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0

Uhh interesting, will definitely try this!

29.12.2025 19:23 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

#chemsky

23.12.2025 12:01 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Supramolecular gels improve performance of aircraft deicing fluids Made using low-cost reagents, the gels could be more sustainable than current anti-icing products

Great to see some of our recently published research featured in @chemistryworld.com magazine.
www.chemistryworld.com/news/supramo...

23.12.2025 08:30 πŸ‘ 17 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
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Predicting drug inactivation by changes in bacterial growth dynamics - npj Antimicrobials and Resistance npj Antimicrobials and Resistance - Predicting drug inactivation by changes in bacterial growth dynamics

Our recent paper in npj Antimicrobials and Resistance is a great example of scientific serendipity: after staring at thousands of bacterial growth curves over many studies, we started wondering whether the curve shapes themselves carry mechanistic information 1/9 🦠πŸ§ͺ
www.nature.com/articles/s44...

22.12.2025 15:25 πŸ‘ 48 πŸ” 26 πŸ’¬ 2 πŸ“Œ 2
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High-throughput triazole-based combinatorial click chemistry for the synthesis and identification of functional metal complexes - Nature Communications Methods for the systematic synthesis and evaluation of large numbers of transition metal complexes at a time are still limited. Here, the authors report a high-throughput method to create and test hun...

πŸŽ„An Early Xmas present for the group!πŸŽ„

Our work on high-throughput synthesis of triazole-based metal complexes is out now in Nature Comm.!

Read it here: www.nature.com/articles/s41...

A blog post by David who helmed the whole project, including a Sonnet: www.thefreilab.com/post/naturec...

23.12.2025 10:58 πŸ‘ 8 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Point of no returns: researchers are crossing a threshold in the fight for funding With so little money to go round, the costs of competing for grants can exceed what the grants are worth. When that happens, nobody wins.

"How can funders avoid crossing the Szilard point?"

The Szilard point is "the threshold at which the total cost of competing for a grant equals (or surpasses) the value of the available funding."

19.12.2025 07:57 πŸ‘ 112 πŸ” 59 πŸ’¬ 4 πŸ“Œ 16
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New spectroscopic approach reveals how key tuberculosis drug acts inside living bacteria New research resolves how the critical tuberculosis drug bedaquiline disrupts bioenergetics to attack the pathogen by using a powerful spectroscopic technique

A new spectroscopic approach reveals how key tuberculosis drug acts inside living bacteria

New research resolves how the critical tuberculosis drug bedaquiline disrupts bioenergetics to attack the pathogen by using a powerful spectroscopic technique.

www.york.ac.uk/chemistry/ab...

19.12.2025 07:42 πŸ‘ 3 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

Great to see that the Department of Chemistry in York has joined Bluesky! #chemsky

bsky.app/profile/chem...

12.12.2025 12:39 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Great idea, hopefully this will expand! Moving from CH-AUS-UK-CH-UK messed up any pension I had quite thoroughly!

03.12.2025 09:46 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
A table showing profit margins of major publishers. A snippet of text related to this table is below.

1. The four-fold drain
1.1 Money
Currently, academic publishing is dominated by profit-oriented, multinational companies for
whom scientific knowledge is a commodity to be sold back to the academic community who
created it. The dominant four are Elsevier, Springer Nature, Wiley and Taylor & Francis,
which collectively generated over US$7.1 billion in revenue from journal publishing in 2024
alone, and over US$12 billion in profits between 2019 and 2024 (Table 1A). Their profit
margins have always been over 30% in the last five years, and for the largest publisher
(Elsevier) always over 37%.
Against many comparators, across many sectors, scientific publishing is one of the most
consistently profitable industries (Table S1). These financial arrangements make a substantial
difference to science budgets. In 2024, 46% of Elsevier revenues and 53% of Taylor &
Francis revenues were generated in North America, meaning that North American
researchers were charged over US$2.27 billion by just two for-profit publishers. The
Canadian research councils and the US National Science Foundation were allocated US$9.3
billion in that year.

A table showing profit margins of major publishers. A snippet of text related to this table is below. 1. The four-fold drain 1.1 Money Currently, academic publishing is dominated by profit-oriented, multinational companies for whom scientific knowledge is a commodity to be sold back to the academic community who created it. The dominant four are Elsevier, Springer Nature, Wiley and Taylor & Francis, which collectively generated over US$7.1 billion in revenue from journal publishing in 2024 alone, and over US$12 billion in profits between 2019 and 2024 (Table 1A). Their profit margins have always been over 30% in the last five years, and for the largest publisher (Elsevier) always over 37%. Against many comparators, across many sectors, scientific publishing is one of the most consistently profitable industries (Table S1). These financial arrangements make a substantial difference to science budgets. In 2024, 46% of Elsevier revenues and 53% of Taylor & Francis revenues were generated in North America, meaning that North American researchers were charged over US$2.27 billion by just two for-profit publishers. The Canadian research councils and the US National Science Foundation were allocated US$9.3 billion in that year.

A figure detailing the drain on researcher time.

1. The four-fold drain

1.2 Time
The number of papers published each year is growing faster than the scientific workforce,
with the number of papers per researcher almost doubling between 1996 and 2022 (Figure
1A). This reflects the fact that publishers’ commercial desire to publish (sell) more material
has aligned well with the competitive prestige culture in which publications help secure jobs,
grants, promotions, and awards. To the extent that this growth is driven by a pressure for
profit, rather than scholarly imperatives, it distorts the way researchers spend their time.
The publishing system depends on unpaid reviewer labour, estimated to be over 130 million
unpaid hours annually in 2020 alone (9). Researchers have complained about the demands of
peer-review for decades, but the scale of the problem is now worse, with editors reporting
widespread difficulties recruiting reviewers. The growth in publications involves not only the
authors’ time, but that of academic editors and reviewers who are dealing with so many
review demands.
Even more seriously, the imperative to produce ever more articles reshapes the nature of
scientific inquiry. Evidence across multiple fields shows that more papers result in
β€˜ossification’, not new ideas (10). It may seem paradoxical that more papers can slow
progress until one considers how it affects researchers’ time. While rewards remain tied to
volume, prestige, and impact of publications, researchers will be nudged away from riskier,
local, interdisciplinary, and long-term work. The result is a treadmill of constant activity with
limited progress whereas core scholarly practices – such as reading, reflecting and engaging
with others’ contributions – is de-prioritized. What looks like productivity often masks
intellectual exhaustion built on a demoralizing, narrowing scientific vision.

A figure detailing the drain on researcher time. 1. The four-fold drain 1.2 Time The number of papers published each year is growing faster than the scientific workforce, with the number of papers per researcher almost doubling between 1996 and 2022 (Figure 1A). This reflects the fact that publishers’ commercial desire to publish (sell) more material has aligned well with the competitive prestige culture in which publications help secure jobs, grants, promotions, and awards. To the extent that this growth is driven by a pressure for profit, rather than scholarly imperatives, it distorts the way researchers spend their time. The publishing system depends on unpaid reviewer labour, estimated to be over 130 million unpaid hours annually in 2020 alone (9). Researchers have complained about the demands of peer-review for decades, but the scale of the problem is now worse, with editors reporting widespread difficulties recruiting reviewers. The growth in publications involves not only the authors’ time, but that of academic editors and reviewers who are dealing with so many review demands. Even more seriously, the imperative to produce ever more articles reshapes the nature of scientific inquiry. Evidence across multiple fields shows that more papers result in β€˜ossification’, not new ideas (10). It may seem paradoxical that more papers can slow progress until one considers how it affects researchers’ time. While rewards remain tied to volume, prestige, and impact of publications, researchers will be nudged away from riskier, local, interdisciplinary, and long-term work. The result is a treadmill of constant activity with limited progress whereas core scholarly practices – such as reading, reflecting and engaging with others’ contributions – is de-prioritized. What looks like productivity often masks intellectual exhaustion built on a demoralizing, narrowing scientific vision.

A table of profit margins across industries. The section of text related to this table is below:

1. The four-fold drain
1.1 Money
Currently, academic publishing is dominated by profit-oriented, multinational companies for
whom scientific knowledge is a commodity to be sold back to the academic community who
created it. The dominant four are Elsevier, Springer Nature, Wiley and Taylor & Francis,
which collectively generated over US$7.1 billion in revenue from journal publishing in 2024
alone, and over US$12 billion in profits between 2019 and 2024 (Table 1A). Their profit
margins have always been over 30% in the last five years, and for the largest publisher
(Elsevier) always over 37%.
Against many comparators, across many sectors, scientific publishing is one of the most
consistently profitable industries (Table S1). These financial arrangements make a substantial
difference to science budgets. In 2024, 46% of Elsevier revenues and 53% of Taylor &
Francis revenues were generated in North America, meaning that North American
researchers were charged over US$2.27 billion by just two for-profit publishers. The
Canadian research councils and the US National Science Foundation were allocated US$9.3
billion in that year.

A table of profit margins across industries. The section of text related to this table is below: 1. The four-fold drain 1.1 Money Currently, academic publishing is dominated by profit-oriented, multinational companies for whom scientific knowledge is a commodity to be sold back to the academic community who created it. The dominant four are Elsevier, Springer Nature, Wiley and Taylor & Francis, which collectively generated over US$7.1 billion in revenue from journal publishing in 2024 alone, and over US$12 billion in profits between 2019 and 2024 (Table 1A). Their profit margins have always been over 30% in the last five years, and for the largest publisher (Elsevier) always over 37%. Against many comparators, across many sectors, scientific publishing is one of the most consistently profitable industries (Table S1). These financial arrangements make a substantial difference to science budgets. In 2024, 46% of Elsevier revenues and 53% of Taylor & Francis revenues were generated in North America, meaning that North American researchers were charged over US$2.27 billion by just two for-profit publishers. The Canadian research councils and the US National Science Foundation were allocated US$9.3 billion in that year.

The costs of inaction are plain: wasted public funds, lost researcher time, compromised
scientific integrity and eroded public trust. Today, the system rewards commercial publishers
first, and science second. Without bold action from the funders we risk continuing to pour
resources into a system that prioritizes profit over the advancement of scientific knowledge.

The costs of inaction are plain: wasted public funds, lost researcher time, compromised scientific integrity and eroded public trust. Today, the system rewards commercial publishers first, and science second. Without bold action from the funders we risk continuing to pour resources into a system that prioritizes profit over the advancement of scientific knowledge.

We wrote the Strain on scientific publishing to highlight the problems of time & trust. With a fantastic group of co-authors, we present The Drain of Scientific Publishing:

a 🧡 1/n

Drain: arxiv.org/abs/2511.04820
Strain: direct.mit.edu/qss/article/...
Oligopoly: direct.mit.edu/qss/article/...

11.11.2025 11:52 πŸ‘ 643 πŸ” 453 πŸ’¬ 8 πŸ“Œ 66

I would like to move chemistry-related conversations to chemchat, seeing as how chem/sky is basically a promotion place now.

I would have liked that to have moderated, but it's bluntly clear that the publishing houses can't change their spots

06.11.2025 18:04 πŸ‘ 43 πŸ” 10 πŸ’¬ 7 πŸ“Œ 3
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We are delighted to introduce our Postdoctoral researcher @jwsouthwell.bsky.social πŸ™Œ

#MeetTheTeam #chemistry #research #UZH

04.11.2025 15:35 πŸ‘ 7 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
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The Parkinson's Disease Drug Tolcapone and Analogues are Potent Glycomimetic Lectin Inhibitors of Pseudomonas aeruginosa LecA We present Tolcapone and derivatives as a new class of potent glycomimetics for lectin inhibition. Over 3200 Roche in-house compounds were screened experimentally and a subset was biophysically evalu...

I am delighted to share our recent collaborative progress towards drug-like glycomimetics for lectins with @anneimb.bsky.social and Roche. Published in @angewandtechemie.bsky.social #ChemBio #Glycotime onlinelibrary.wiley.com/doi/full/10....

04.11.2025 11:48 πŸ‘ 22 πŸ” 7 πŸ’¬ 1 πŸ“Œ 2
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From Pharmacophore to Warhead: NAD+‐Targeting Triazoles as Mechanism‐Based Sirtuin Inhibitors We report β€œSirtuin Trapping Ligands” (SirTraps), mechanism-based 1,2,3-triazole inhibitors that hijack sirtuin (SIRT) catalysis to form covalent triazolium– or triazole–ADP-ribose (ADPR) adducts from...

We call these mechanism based sirtuin inhibitors SirTraps that trap the enzyme via this ADP ribose adduct onlinelibrary.wiley.com/doi/10.1002/... 2/

02.11.2025 13:20 πŸ‘ 21 πŸ” 6 πŸ’¬ 1 πŸ“Œ 0
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Profiling the proteome-wide selectivity of diverse electrophiles - Nature Chemistry Covalent inhibitors are powerful entities in drug discovery. Now the amino acid selectivity and reactivity of a diverse electrophile library have been assessed proteome-wide using an unbiased workflow...

How can we study target engagement and selectivity of covalent inhibitors? Which electrophilic probes are best suited to study a certain amino acid?

Our study on "Profiling the proteome-wide selectivity of diverse electrophiles" is published in Nature Chemistry.(1/7)

www.nature.com/articles/s41...

30.10.2025 10:27 πŸ‘ 87 πŸ” 34 πŸ’¬ 3 πŸ“Œ 5

Having a PhD means you can find the word β€œunfortunately” in an email faster that the search function

28.10.2025 03:58 πŸ‘ 392 πŸ” 41 πŸ’¬ 8 πŸ“Œ 4

Congratulations Ronan!

23.10.2025 06:42 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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I'm delighted to share that I have joined the School of Biological Sciences at @unisouthampton.bsky.social as Professor in Microbial Biofilms. I'm very excited about this next step in my academic journey and the opportunity to work more closely with all the great scientists at Southampton and

23.10.2025 05:49 πŸ‘ 57 πŸ” 6 πŸ’¬ 9 πŸ“Œ 0