Lightnews — Scholar-powered news

John Seed

@john-seed.bsky.social

79 followers 96 following 17 posts

Research Fellow in the Liddle group at the University of Manchester. Actinide metal-metal bonding, actinide-pnictogen chemistry, and actinide magnetism ☢️☢️🧲

Posts Media Videos Starter Packs

Pinned

John Seed @john-seed.bsky.social · Apr 11

Years in the making – 3-centre-1-electron trithorium metal-metal bonding. Out now in @natchem.nature.com !

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

Valence-delocalized trithorium nanocluster superatoms with open-shell exalted diamagnetism - Nature Chemistry

Superatoms are metal clusters that collectively behave like an atom, but they usually require metal–metal bonding and thus they are based on main group or transition metals. Now it has been shown that...

www.nature.com

4 8 34

Reposted by John Seed

Carsten von Hänisch @haenisch-group.bsky.social · Aug 18

Great collaboration between the Universities of Manchester and Marburg to bring uranium and antimony together. @john-seed.bsky.social‬, ‪@unimarburg.bsky.social‬,
Special congratulations to Rebecca, Kevin and Nick for their synthetic work.
rdcu.be/eBcJt

Uranium-stibinidiide, -stibinidene, and -stibido multiple bonds and uranium-nitride formation from multimetallic diuranium-distibene-mediated dinitrogen cleavage

Nature Communications - Although uranium-nitrogen multiple bonding is well developed, there are far fewer uranium-phosphorus and -arsenic multiple bonds, and none for antimony, even in...

rdcu.be

1 13

John Seed @john-seed.bsky.social · Aug 15

Huge (!) congratulations to Becky and Jingzhen for some tremendous synthetic chemistry, and for the former's 1st first author publication, and to all authors who helped contribute to this work - especially @haenisch-group.bsky.social at @unimarburg.bsky.social. Please read and enjoy!

John Seed @john-seed.bsky.social · Aug 15

There are no examples of uranium-antimony multiple bonds, even under spectroscopic scenarios. Until now. Check out our work on U-Sb bonds spanning single, double, and pseudo-triple bonding interactions. Out now in @natcomms.nature.com ! www.nature.com/articles/s41...

Uranium-stibinidiide, -stibinidene, and -stibido multiple bonds and uranium-nitride formation from multimetallic diuranium-distibene-mediated dinitrogen cleavage - Nature Communications

Although uranium-nitrogen multiple bonding is well developed, there are far fewer uranium-phosphorus and -arsenic multiple bonds, and none for antimony, even in spectroscopic scenarios. Here, the auth...

www.nature.com

1 1 12

Reposted by John Seed

Chemistry World @chemistryworld.com · Aug 15

Complexes containing nobelium were created as part of new research into the chemistry of the actinide series.

Nobelium becomes heaviest element with identified compounds

Complexes containing hydroxide, water and dinitrogen ligands detected as researchers probe chemistry on the edge of the actinide series

www.chemistryworld.com

2 3

John Seed @john-seed.bsky.social · Jul 17

Thanks a lot for the support Dave! 😄

John Seed @john-seed.bsky.social · Jul 17

Thank you!

John Seed @john-seed.bsky.social · Jul 10

I think I’ll be using that analogy from now on. Thanks a lot - glad you like it!

John Seed @john-seed.bsky.social · Jul 10

Delighted to have received the @manchester.ac.uk Chemistry department Outstanding Achievement Award for our work on exalted diamagnetism in trithorium superatoms. Hugely grateful to the team of people who contributed to this work and all those who supported yesterday during the award symposium 😃

3 13

Reposted by John Seed

David Mills @millsgroupchem.bsky.social · Jun 26

Jek leads our latest preprint in @chemrxiv.bsky.social with the @nfchilton.bsky.social group on a mixed axial dysprosium amide-cyclopentadienyl single-molecule magnet (SMMs). We find similar high-temperature soft hysteretic properties to dysprosium bis(amide) SMMs.
chemrxiv.org/engage/chemr...

Magnetic hysteresis up to 73 K in a dysprosium cyclopentadienyl-amide single-molecule magnet

Single-molecule magnets (SMMs) based on dysprosocenium cations, [Dy(CpR)2]+ (CpR = substituted cyclopentadienyl), have set record effective energy barriers to magnetic reversal (Ueff) and temperatures...

chemrxiv.org

2 14

John Seed @john-seed.bsky.social · Jun 26

Huge congratulations Dave, Nick, Gemma and team! 🎉🥳

1 2

Reposted by John Seed

David Mills @millsgroupchem.bsky.social · Jun 25

Delighted to announce the publication of our work in @nature.com, in collaboration with @nfchilton.bsky.social's group, on a dysprosium compound with magnetic memory at 100 Kelvin. Congrats to all authors inc. @gemmagransbury.bsky.social, @jeffjefftyjeff.bsky.social
www.nature.com/articles/s41...

Soft magnetic hysteresis in a dysprosium amide–alkene complex up to 100 kelvin - Nature

A dysprosium amide–alkene complex shows soft magnetic hysteresis loops up to 100 kelvin, arising from the high charge density of the amide ligands and the structural role of the pendant alkene.

www.nature.com

7 18 71

Reposted by John Seed

Josef Boronski @josefboronski.bsky.social · Jun 2

Breaking bonds at tin(II)! We've had a look at the spectrum of bond addition reactions, from reductive (Be-Be) to oxidative (Cl-Cl), and everything in between (B-B, B-H, H-H)
@angewandtechemie.bsky.social @maxdietz.bsky.social @amelia-swarbrook.bsky.social
doi.org/10.1002/anie...

Breaking Bonds at Tin(II): Reductive or Oxidative Addition?

Here, the addition of H–H, Be–Be, B–B, and B–H bonds to SnII is studied by experimental and theoretical means. We report the first examples of B–B and Be–Be bond additions to a main group metal centr...

doi.org

4 31

John Seed @john-seed.bsky.social · May 30

Good luck with everything Gemma!

Reposted by John Seed

Chemistry World @chemistryworld.com · May 6

The first superatoms made using actinides ever created are adding a new dimension to one of the strangest chemical phenomena.
#ChemSky

Trithorium superatom confounds with its unexpected and ‘mind-blowing’ diamagnetism

Nanocluster behaves like a 'super alkali-metal'

www.chemistryworld.com

2 12

John Seed @john-seed.bsky.social · Apr 17

Thanks a lot Lisa. Glad you like it!

John Seed @john-seed.bsky.social · Apr 17

Thanks so much! 😃

John Seed @john-seed.bsky.social · Apr 17

Thanks Andrew. Absolutely! 🤝🏻

John Seed @john-seed.bsky.social · Apr 11

This has been a mountain of work from all authors, and impossible without the contributions of the whole team. Eternally grateful to have such talented, knowledgeable, and collaborative colleagues here in Manchester. Please read and enjoy! @uniofmanchester.bsky.social

John Seed @john-seed.bsky.social · Apr 11

However, in external applied magnetic fields, these S = 1/2 clusters are diamagnetic (!) as the valence delocalisation enables exalted diamagnetism, which overwhelms the intrinsic paramagnetic character, experimentally evidencing actinide open-shell superatomic character.

John Seed @john-seed.bsky.social · Apr 11

Solution spectroscopy highlights Robin–Day Class III 6d-orbital valence delocalisation, and variable temperature EPR confirms axial-type 6d¹ character, with the g value ordering suggesting that this is delocalised within the Th₃ core, not localised on a thorium ion.

John Seed @john-seed.bsky.social · Apr 11

Years in the making – 3-centre-1-electron trithorium metal-metal bonding. Out now in @natchem.nature.com !

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

Valence-delocalized trithorium nanocluster superatoms with open-shell exalted diamagnetism - Nature Chemistry

www.nature.com

4 8 34

John Seed @john-seed.bsky.social · Apr 9

Super cool work! Congrats all!

Reposted by John Seed

La Pierre Group @f-orbitals.bsky.social · Apr 7

We are excited to share praseodymium 5+! Finally in print!
A new PR for Pr!

rdcu.be/egHf6

Praseodymium in the formal +5 oxidation state

Nature Chemistry - The most common oxidation state for lanthanide elements is +3, and, beyond cerium, examples of these elements exhibiting higher oxidation states remain scarce. Now, a molecular...

rdcu.be

6 16 61

John Seed @john-seed.bsky.social · Mar 1

Berkelium - wow. Really impressive chemistry!

Jake Yeston @jakeyeston.bsky.social · Feb 27

In @science.org this week, a team at Lawrence Berkeley lab did some practice runs with cerium and then raced to sandwich berkelium between two carbon rings before the radioactive decay wreaked too much havoc--read all about the Bk-C bonds here!

chemsky🧪

www.science.org/doi/10.1126/...

Berkelium–carbon bonding in a tetravalent berkelocene

Interest in actinide–carbon bonds has persisted since actinide organometallics were first investigated for applications in isotope separation during the Manhattan Project. Transplutonium organometalli...

www.science.org

Reposted by John Seed

Josef Boronski @josefboronski.bsky.social · Feb 17

Fully funded 3.5-year PhD studentship! Come and work on alkaline earth metal organometallic chemistry and metal-metal bonding @imperialcollegeldn.bsky.social! More details via the link: www.imperial.ac.uk/chemistry/po...

10 110 430