Frederik Haase
@frederikhaase.bsky.social
Framework Materials Chemist (MOF, COF and other organic frameworks). Juniorprofessor at University of Halle, Germany
Posting about science.
https://orcid.org/0000-0003-1156-033X
https://www.chemie.uni-halle.de/ak_haase/
Posting about science.
https://orcid.org/0000-0003-1156-033X
https://www.chemie.uni-halle.de/ak_haase/
Pinned
Evidence of Heteroepitaxy and Solid Solutions in Lattice Matched Ternary Covalent Organic Framework Systems
Covalent organic frameworks (COFs) are crystalline, porous materials with the possibility for broad applications, but their structural diversity remains constrained by simple net topologies, limiting ...
pubs.acs.org
Alena's and Juliane's paper is now out! By matching linker sizes we could show that disordered mixed ternary phases form, as well as molecularly defined heteroepitaxial interfaces between COFs. @jacs.acspublications.org
pubs.acs.org/doi/10.1021/...
pubs.acs.org/doi/10.1021/...
Today I am talking in my reticular materials class about the stability of MOFs, where I show this great figure of stability in phosphate buffer. It is always important to specify that stable means in what context! From this great paper: pubs.acs.org/doi/10.1021/...
November 26, 2025 at 8:10 AM
Today I am talking in my reticular materials class about the stability of MOFs, where I show this great figure of stability in phosphate buffer. It is always important to specify that stable means in what context! From this great paper: pubs.acs.org/doi/10.1021/...
Reposted by Frederik Haase
A fully funded PhD position is available in my future research group at the University of Bern (start between May and September 2026). We are developing polycyclic aromatics for semiconductors, sensors & more! Please spread the word! More information here: tinyurl.com/4n9ere6h
PhD Position in Organic Synthesis of Polycyclic Aromatic Hydrocarbons 100 %
tinyurl.com
November 25, 2025 at 12:05 PM
A fully funded PhD position is available in my future research group at the University of Bern (start between May and September 2026). We are developing polycyclic aromatics for semiconductors, sensors & more! Please spread the word! More information here: tinyurl.com/4n9ere6h
This does seem very 1950s.
November 24, 2025 at 1:57 PM
This does seem very 1950s.
Looking into reliable and longterm spectroscopic data storage I realized the ubiquity of the JCAMP-DX files.
But why are they so complicated. Why not a good old X-Y file?
I can imagine an digital archeologist finding these in 100 years and rolling their eyes.
But why are they so complicated. Why not a good old X-Y file?
I can imagine an digital archeologist finding these in 100 years and rolling their eyes.
November 24, 2025 at 9:49 AM
Looking into reliable and longterm spectroscopic data storage I realized the ubiquity of the JCAMP-DX files.
But why are they so complicated. Why not a good old X-Y file?
I can imagine an digital archeologist finding these in 100 years and rolling their eyes.
But why are they so complicated. Why not a good old X-Y file?
I can imagine an digital archeologist finding these in 100 years and rolling their eyes.
The AI hype in science put into numbers:
www.nature.com/articles/d41...
www.nature.com/articles/d41...
‘Godfather of AI’ becomes first person to hit one million citations
The milestone makes machine-learning trailblazer Yoshua Bengio the most cited researcher on Google Scholar.
www.nature.com
November 21, 2025 at 12:01 PM
The AI hype in science put into numbers:
www.nature.com/articles/d41...
www.nature.com/articles/d41...
Reposted by Frederik Haase
It's that time again: @cenmag.bsky.social 's molecule of the year poll is now OPEN! Check out the contenders, lovingly curated by yours truly from past C&EN stories, and vote for your favorite by Dec. 11
#chemsky #scisky #moty2025
cen.acs.org/synthesis/Mo...
#chemsky #scisky #moty2025
cen.acs.org/synthesis/Mo...
Meet the molecules of the year 2025
C&EN editors’ annual round-up of spectacular molecules we’ve covered in the past year
cen.acs.org
November 19, 2025 at 4:28 PM
It's that time again: @cenmag.bsky.social 's molecule of the year poll is now OPEN! Check out the contenders, lovingly curated by yours truly from past C&EN stories, and vote for your favorite by Dec. 11
#chemsky #scisky #moty2025
cen.acs.org/synthesis/Mo...
#chemsky #scisky #moty2025
cen.acs.org/synthesis/Mo...
Reposted by Frederik Haase
November 18, 2025 at 6:57 PM
Reposted by Frederik Haase
#chemchat #chemsky I need your recommendation for a very high boiling point solvent that can be used at 300C. Ph2O is not high enough (it goes to around 250C). Cannot be protic, cannot have amines. It doesn't need to be a liquid at room temp. Ideas?
Cc @adrianlorenzana.ca
Cc @adrianlorenzana.ca
November 18, 2025 at 4:26 PM
#chemchat #chemsky I need your recommendation for a very high boiling point solvent that can be used at 300C. Ph2O is not high enough (it goes to around 250C). Cannot be protic, cannot have amines. It doesn't need to be a liquid at room temp. Ideas?
Cc @adrianlorenzana.ca
Cc @adrianlorenzana.ca
I literally cannot understand how it is possible to generate data like this. Even if the data is manipulated/fake how would you ever get these odd curves. In some sense the curve looks hand draw, but even then it would be strange to have that shape.
"TEM linear scanning energy spectrum" take a look at the green line
November 18, 2025 at 1:21 PM
I literally cannot understand how it is possible to generate data like this. Even if the data is manipulated/fake how would you ever get these odd curves. In some sense the curve looks hand draw, but even then it would be strange to have that shape.
November 18, 2025 at 10:57 AM
Reposted by Frederik Haase
Arraying MOPs into one-dimensional structures via van der Waals interactions creates new porous aerogels. Three years of Ayana's work is now posted on @chemrxiv.org!!
chemrxiv.org/engage/chemr...
chemrxiv.org/engage/chemr...
November 18, 2025 at 6:46 AM
Arraying MOPs into one-dimensional structures via van der Waals interactions creates new porous aerogels. Three years of Ayana's work is now posted on @chemrxiv.org!!
chemrxiv.org/engage/chemr...
chemrxiv.org/engage/chemr...
November 17, 2025 at 10:01 PM
Reposted by Frederik Haase
From mid-November on, before you send an email ask yourself if this is really a 2025 problem
November 17, 2025 at 10:27 AM
From mid-November on, before you send an email ask yourself if this is really a 2025 problem
Organic Chemists: If you can buy it, you can also make it.
My opinion: If you can buy it, don't make it.
Your salary, time spent on optimization & synthesis and the unseen cost of solvents, consumables and equipment justify buying even expensive chemicals in most cases.
My opinion: If you can buy it, don't make it.
Your salary, time spent on optimization & synthesis and the unseen cost of solvents, consumables and equipment justify buying even expensive chemicals in most cases.
November 17, 2025 at 9:37 AM
Organic Chemists: If you can buy it, you can also make it.
My opinion: If you can buy it, don't make it.
Your salary, time spent on optimization & synthesis and the unseen cost of solvents, consumables and equipment justify buying even expensive chemicals in most cases.
My opinion: If you can buy it, don't make it.
Your salary, time spent on optimization & synthesis and the unseen cost of solvents, consumables and equipment justify buying even expensive chemicals in most cases.
Reposted by Frederik Haase
I had a great time speaking at Martin Luther University in Halle, Germany, this week. Halle an der Saale is a beautiful city (it was hardly bombed!), and my host, @frederikhaase.bsky.social, showed me some mind-blowing stuff he's doing with COFs.
#ChemChat #ChemSky
#ChemChat #ChemSky
November 14, 2025 at 3:03 PM
I had a great time speaking at Martin Luther University in Halle, Germany, this week. Halle an der Saale is a beautiful city (it was hardly bombed!), and my host, @frederikhaase.bsky.social, showed me some mind-blowing stuff he's doing with COFs.
#ChemChat #ChemSky
#ChemChat #ChemSky
Why does everything have to be a puzzle and a mystery. Why can't nature from time tell me what is going on.
November 7, 2025 at 1:59 PM
Why does everything have to be a puzzle and a mystery. Why can't nature from time tell me what is going on.
Better to have knowledge about the chemistry of spices than the spiciness of chemicals.
How much do you know about the chemistry of spices? Test your knowledge of what spice chemicals can do besides seasoning food. cen.acs.org/biological-c... #chemsky 🧪
Quiz: How much do you know about the chemistry of spices?
Test your knowledge of what spice chemicals can do besides seasoning food.
cen.acs.org
November 6, 2025 at 8:15 PM
Better to have knowledge about the chemistry of spices than the spiciness of chemicals.
Reposted by Frederik Haase
Understanding geometry through model making
November 6, 2025 at 5:51 PM
Understanding geometry through model making
Reposted by Frederik Haase
My new Emmy Noether Group is recruiting!
🔬 Two PhD positions in plant pathogen evolution
🧬 Start: April 2026 (flexible)
📍 Dept. of Phytopathology & Plant Protection @rstam.bsky.social @uni-kiel.de
⏰ Apply by 15 Dec 2025
🔗 More info: www.uni-kiel.de/personal/de/...
Do get in touch or share 😊
🔬 Two PhD positions in plant pathogen evolution
🧬 Start: April 2026 (flexible)
📍 Dept. of Phytopathology & Plant Protection @rstam.bsky.social @uni-kiel.de
⏰ Apply by 15 Dec 2025
🔗 More info: www.uni-kiel.de/personal/de/...
Do get in touch or share 😊
Aktuelle Ausschreibungen
Aktuelle Ausschreibungen
www.uni-kiel.de
November 3, 2025 at 9:03 AM
My new Emmy Noether Group is recruiting!
🔬 Two PhD positions in plant pathogen evolution
🧬 Start: April 2026 (flexible)
📍 Dept. of Phytopathology & Plant Protection @rstam.bsky.social @uni-kiel.de
⏰ Apply by 15 Dec 2025
🔗 More info: www.uni-kiel.de/personal/de/...
Do get in touch or share 😊
🔬 Two PhD positions in plant pathogen evolution
🧬 Start: April 2026 (flexible)
📍 Dept. of Phytopathology & Plant Protection @rstam.bsky.social @uni-kiel.de
⏰ Apply by 15 Dec 2025
🔗 More info: www.uni-kiel.de/personal/de/...
Do get in touch or share 😊
Reposted by Frederik Haase
SAVE THE DATE! The 11th European Crystallography School (ECS11) takes place June 28–July 4, 2026, in Stockholm, Sweden. Topics: single-crystal X-ray diffraction, powder X-ray diffraction & 3D electron diffraction.
Learn from leading experts through lectures and hands-on workshops!
www.ecs11.org
Learn from leading experts through lectures and hands-on workshops!
www.ecs11.org
November 2, 2025 at 8:15 PM
SAVE THE DATE! The 11th European Crystallography School (ECS11) takes place June 28–July 4, 2026, in Stockholm, Sweden. Topics: single-crystal X-ray diffraction, powder X-ray diffraction & 3D electron diffraction.
Learn from leading experts through lectures and hands-on workshops!
www.ecs11.org
Learn from leading experts through lectures and hands-on workshops!
www.ecs11.org
Reposted by Frederik Haase
Two-Dimensional Semiconducting Covalent Organic Frameworks with Unidirectional Fused-Ring Bands http://dx.doi.org/10.1021/jacs.5c15083
October 30, 2025 at 2:15 PM
Two-Dimensional Semiconducting Covalent Organic Frameworks with Unidirectional Fused-Ring Bands http://dx.doi.org/10.1021/jacs.5c15083
Reposted by Frederik Haase
💫 Open PhD position in synthetic lanthanide and actinide chemistry, with a focus on switchable materials, at DTU Chemistry! 🇩🇰 🧪
🔗 Learn more and apply here: efzu.fa.em2.oraclecloud.com/hcmUI/Candid...
⏰ Deadline: November 30
Check out our recent work here: www.kasperpedersen.org
🔗 Learn more and apply here: efzu.fa.em2.oraclecloud.com/hcmUI/Candid...
⏰ Deadline: November 30
Check out our recent work here: www.kasperpedersen.org
October 28, 2025 at 9:04 AM
💫 Open PhD position in synthetic lanthanide and actinide chemistry, with a focus on switchable materials, at DTU Chemistry! 🇩🇰 🧪
🔗 Learn more and apply here: efzu.fa.em2.oraclecloud.com/hcmUI/Candid...
⏰ Deadline: November 30
Check out our recent work here: www.kasperpedersen.org
🔗 Learn more and apply here: efzu.fa.em2.oraclecloud.com/hcmUI/Candid...
⏰ Deadline: November 30
Check out our recent work here: www.kasperpedersen.org
One giant leap for us, one small step for digitization.
October 27, 2025 at 1:50 PM
One giant leap for us, one small step for digitization.
If you ever decide you want to make a COF for the first time, this one should be your first try. It is somewhat known in the community, but you will not really learn this from the literature this COF system is one of the most robust, in terms of synthesis and activation conditions.
October 23, 2025 at 12:11 PM
If you ever decide you want to make a COF for the first time, this one should be your first try. It is somewhat known in the community, but you will not really learn this from the literature this COF system is one of the most robust, in terms of synthesis and activation conditions.