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Kasper S. Pedersen @kasperspedersen.bsky.social · 6d

High-Temperature Compensated Ferrimagnetism in the Molecular Framework Cr(pyrazine)3

Molecule-based analogues of perovskites hold promise for emergent electronic and magnetic phenomena, yet examples with sufficiently strong correlations remain elusive. We report the synthesis of Cr(py...

chemrxiv.org

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Kasper S. Pedersen @kasperspedersen.bsky.social · 6d

🧪 Simplicity engineered for magnetism 🧲

📢 Preprint: Cr(pyrazine)₃ - maybe the simplest MOF with potential voids known. Built from Cr(III) + radical pyrazine linkers, this perovskite analogue shows magnetic interactions rivaling the strongest known in inorganic materials, stabilizing order above RT.

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Kasper S. Pedersen @kasperspedersen.bsky.social · Jul 22

📣 New preprint: "4f-intermediate valence in an ytterbium–bipyridine coordination solid"

chemrxiv.org/engage/chemr...

We report exp. evidence for a multiconfigurational electronic ground state in a ytterbocene-based 1D polymer - the first example of intermediate valence in a coordination solid. ⚛️

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Kasper S. Pedersen @kasperspedersen.bsky.social · Jul 10

Congratulations, David!! 🎉

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Kasper S. Pedersen @kasperspedersen.bsky.social · Jul 1

🎉 Just out in Nature Comm @natcomms.nature.com

"Unleashing phosphorus mononitride"

👉 www.nature.com/articles/s41...

Spearheaded by the Reinholdt group (Lund), we find that the elusive P≡N molecule finds new life in an Os complex and unlocks unique [NPS₂]²⁻, [NPCl]⁻, and aromatic [PN₄]⁻ species.

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Kasper S. Pedersen @kasperspedersen.bsky.social · Jun 24

Honored to receive the 2025 Bjerrum Gold Medal 🏅 for "outstanding contributions to inorganic and coordination chemistry", awarded at the Danish Chemical Society Annual Meeting.
Pictured with Niels J. Bjerrum, grandson of the celebrated chemist Niels J. Bjerrum.

www.kemi.dtu.dk/english/nyhe...

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Kasper S. Pedersen @kasperspedersen.bsky.social · Jun 12

⏰ Only three more days to apply for an open PhD position in 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...

📖 You can explore our recent work here: www.kasperpedersen.org

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Kasper S. Pedersen @kasperspedersen.bsky.social · May 13

👋 We are excited to share an open PhD position in 4f/5f chemistry, with a focus on switchable materials, at the Technical University of Denmark!🧪

🔗 See more and apply here:
efzu.fa.em2.oraclecloud.com/hcmUI/Candid...

📅 Deadline: May 30
📖 Find our recent work here: www.kasperpedersen.org/articles/

PhD scholarship in switchable f-block–organic framework materials - DTU Chemistry

PhD scholarship in switchable f-block–organic framework materials. The PhD project will focus on the design, synthesis, and characterization of new types of metal-organic network structures, which inc...

efzu.fa.em2.oraclecloud.com

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Kasper S. Pedersen @kasperspedersen.bsky.social · Apr 28

valence change transitions from parent materials that do not display any valence change transition themselves.

Kasper S. Pedersen @kasperspedersen.bsky.social · Apr 28

dramatically altering the materials’ magnetization and electrical conductivity by up to five orders of magnitude.
This work establishes a new paradigm in the manipulation of (metal-organic) van der Waals crystals, where molecular alloying can drive complete and temperature-tunable

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Kasper S. Pedersen @kasperspedersen.bsky.social · Apr 28

💡In short:
By leveraging molecular alloying, we've discovered a novel mechanism to control valence changes in a layered metal-organic material. Specifically, by alloying aliovalent Cr(pyrazine)I2 and Cr(pyrazine)2Br2, we can switch between Cr(II) and Cr(III) states thermally,

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Kasper S. Pedersen @kasperspedersen.bsky.social · Apr 28

🎉 Just out in Chem! @cp-chem.bsky.social

"Molecular alloying drives valence change in a van der Waals antiferromagnet"

👉 See: www.cell.com/chem/abstrac...

for materials synthesis, and lots of electron, (high-pressure) X-ray, and neutron diffraction and spectroscopy, magnetism and transport.

Molecular alloying drives valence change in a van der Waals antiferromagnet

Engineering van der Waals (vdW) crystals leverages control of the confinement and transport of charge, spin, and heat in 2D atomic layers. This study introduces a new function by altering valence stat...

www.cell.com

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Kasper S. Pedersen @kasperspedersen.bsky.social · Mar 8

🧑‍🔬 Anton Viborg, @majadunstan.bsky.social, Nathan Yutronkie, Amit Chanda, Felix Trier, Nini Pryds, Fabrice Wilhelm, Andrei Rogalev, @pinkowiczgroup.bsky.social

🏛 DTU Chemistry, DTU Energy, ESRF - The European Synchrotron, Jagiellonian University
💰 Villum Fonden, Independent Research Fund Denmark

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Kasper S. Pedersen @kasperspedersen.bsky.social · Mar 8

pubs.rsc.org/en/content/a...

Disentangling chemical pressure and superexchange effects in lanthanide-organic valence tautomerism

Valence tautomerism in molecule-based f-block materials remains virtually elusive. As a result, the effects driving and controlling the valence conversion phenomenon are poorly understood. Herein, we ...

pubs.rsc.org

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Kasper S. Pedersen @kasperspedersen.bsky.social · Mar 8

🎉 Our latest research on valence tautomerism in 4f-organic materials is now out in @chemicalscience.rsc.org

We explore the factors driving conversion temperature, cooperativity, thermodynamics, and the magnetic & conductive properties of this fascinating, new class of materials. 🧲⚡

Read it here🔓👇

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Kasper S. Pedersen @kasperspedersen.bsky.social · Mar 5

❄️ Our recent paper on sub-Kelvin magnetic refrigeration in a frustrated Eu(II)-organic network is featured in this week's issue of JACS 📖

Check out the paper here: pubs.acs.org/doi/10.1021/...

#ChemSky

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Kasper S. Pedersen @kasperspedersen.bsky.social · Feb 7

👋Our department at the Technical University of Denmark is looking for an assistant/associate professor in *any* chemical discipline! 🧪🇩🇰

Check it out and feel free to get in touch 💬

👇
efzu.fa.em2.oraclecloud.com/hcmUI/Candid...

Associate Professor or DTU Tenure Track Assistant Professor in Chemistry - DTU Chemistry

The Technical University of Denmark (DTU) offers the opportunity to build a research group in advanced and applied chemistry at an internationally esteemed department with an excellent infrastructure.

efzu.fa.em2.oraclecloud.com

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Reposted by Kasper S. Pedersen

James McPherson @mcphersonjn.bsky.social · Feb 6

📣📣PhD Position available in Inorganic Chemistry at the University of Southern Denmark📣📣

🗓️Application Deadline: 5 March (23:59 CET)

🔁Reposts appreciated

👇👇See Below for more information and to apply👇👇
fa-eosd-saasfaprod1.fa.ocs.oraclecloud.com/hcmUI/Candid...

PhD Position available in Inorganic Chemistry at the University of Southern Denmark

Application deadline: 5 Marts 2025 at 23:59 hours local Danish time

fa-eosd-saasfaprod1.fa.ocs.oraclecloud.com

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Kasper S. Pedersen @kasperspedersen.bsky.social · Jan 22

We dive into the potential of a chemically and structurally unique Eu(II)–organic framework as a cutting-edge refrigerant for sub-Kelvin temperatures. Leveraging geometric frustration to prevent magnetic ordering, this material achieves remarkable efficiency in ultra-low-temperature environments.

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Kasper S. Pedersen @kasperspedersen.bsky.social · Jan 22

🎉 New sub-Kelvin cool paper out in the Journal of the American Chemical Society❄️❄️

"A Triangular Frustrated Eu(II)–Organic Framework for Sub-Kelvin Magnetic Refrigeration"

👉 pubs.acs.org/doi/10.1021/...

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Kasper S. Pedersen @kasperspedersen.bsky.social · Jan 21

🎉 Yesterday, Carl Emil Andersen defended his thesis entitled "Expanding the Field of Low- and Zero-Valent Metals in Metal-Organic Frameworks".

Thanks to Profs. @munzgroup.bsky.social (Saarland), Christine McKenzie (Univ. of Southern Denmark), and Martin Nielsen (DTU) for scrutinizing the thesis.

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Kasper S. Pedersen @kasperspedersen.bsky.social · Jan 15

This includes in addition to 3D-ED, for instance, magnetometry, UV-vis-NIR, IR, fluorescence, EPR & NMR spectroscopy, and X-ray diffraction. 🧑‍🔬
Interested students should check out the course here: kurser.dtu.dk/course/26127

kurser.dtu.dk

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Kasper S. Pedersen @kasperspedersen.bsky.social · Jan 15

With this addition, we now offer a extensive portfolio of state-of-the-art techniques, leveraging some of the department's most advanced equipment to enhance students' hands-on experience in synthesizing and characterizing inorganic compounds and materials.

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Kasper S. Pedersen @kasperspedersen.bsky.social · Jan 15

⚡ 💎 This year, we successfully integrated 3D electron diffraction into the curriculum for "26127 Experimental Inorganic Chemistry" at DTU Chemistry at the Technical University of Denmark — adding a powerful new tool to our teaching toolbox.

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Kasper S. Pedersen @kasperspedersen.bsky.social · Jan 7

🎈The "2024 Pioneering Investigators" Feature Article by @majadunstan.bsky.social and me is highlighted in today's ChemComm!

"Valence tautomerism, non-innocence, and emergent magnetic phenomena in lanthanide-organic tessellations"

📖 Check it out here: pubs.rsc.org/en/content/a...

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