John Seed
@john-seed.bsky.social
Research Fellow in the Liddle group at the University of Manchester. Actinide metal-metal bonding, actinide-pnictogen chemistry, and actinide magnetism ☢️☢️🧲
Pinned
John Seed
@john-seed.bsky.social
· Apr 11
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
Years in the making – 3-centre-1-electron trithorium metal-metal bonding. Out now in @natchem.nature.com !
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Reposted by John Seed
@john-seed.bsky.social collected some gorgeous magnetic data - as always! In fact the Tb(III) data suggested a well-isolated paramagnetic pseudo-doublet spin-orbit ground state which has led to some spin-off work so stay tuned!
October 21, 2025 at 8:03 AM
@john-seed.bsky.social collected some gorgeous magnetic data - as always! In fact the Tb(III) data suggested a well-isolated paramagnetic pseudo-doublet spin-orbit ground state which has led to some spin-off work so stay tuned!
Reposted by John Seed
Y'all wanted some EChem? Check out our contribution in InorgChem @acs.org towards tetravalent lanthanides, with @conradgoodwin.bsky.social, @john-seed.bsky.social, in collaboration with @gen-chem.bsky.social + @peremiro.bsky.social for calculations!
Synthesis, Redox Chemistry, and Electronic Structures of Bis-di(silylamido)silane f-Element Complexes
We report the synthesis and characterization of pseudo-tetrahedral f-element complexes bearing the sterically demanding bidentate di(silylamido)silane ligand, {Me2Si(NSiiPr3)2}2– (Me2SiN†N†). Two equi...
pubs.acs.org
October 21, 2025 at 8:03 AM
Y'all wanted some EChem? Check out our contribution in InorgChem @acs.org towards tetravalent lanthanides, with @conradgoodwin.bsky.social, @john-seed.bsky.social, in collaboration with @gen-chem.bsky.social + @peremiro.bsky.social for calculations!
Reposted by John Seed
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
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
August 18, 2025 at 12:31 PM
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
Special congratulations to Rebecca, Kevin and Nick for their synthetic work.
rdcu.be/eBcJt
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
August 15, 2025 at 4:25 PM
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...
Reposted by John Seed
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
August 15, 2025 at 4:09 PM
Complexes containing nobelium were created as part of new research into the chemistry of the actinide series.
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 😃
July 10, 2025 at 8:08 PM
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 😃
Reposted by John Seed
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...
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
June 26, 2025 at 6:13 PM
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...
chemrxiv.org/engage/chemr...
Reposted by John Seed
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...
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
June 25, 2025 at 5:56 PM
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...
www.nature.com/articles/s41...
Reposted by John Seed
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...
@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
June 2, 2025 at 7:53 PM
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...
@angewandtechemie.bsky.social @maxdietz.bsky.social @amelia-swarbrook.bsky.social
doi.org/10.1002/anie...
Reposted by John Seed
The first superatoms made using actinides ever created are adding a new dimension to one of the strangest chemical phenomena.
#ChemSky
#ChemSky
Trithorium superatom confounds with its unexpected and ‘mind-blowing’ diamagnetism
Nanocluster behaves like a 'super alkali-metal'
www.chemistryworld.com
May 6, 2025 at 2:40 PM
The first superatoms made using actinides ever created are adding a new dimension to one of the strangest chemical phenomena.
#ChemSky
#ChemSky
Years in the making – 3-centre-1-electron trithorium metal-metal bonding. Out now in @natchem.nature.com !
www.nature.com/articles/s41...
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
April 11, 2025 at 12:22 PM
Years in the making – 3-centre-1-electron trithorium metal-metal bonding. Out now in @natchem.nature.com !
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Berkelium - wow. Really impressive chemistry!
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/...
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
March 1, 2025 at 9:17 AM
Berkelium - wow. Really impressive chemistry!
Reposted by John Seed
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...
February 17, 2025 at 8:49 AM
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...
Reposted by John Seed
Happy to share Ben’s first full research article from his time in the group: pubs.acs.org/doi/10.1021/...
Challenging synthesis and some interesting new main group architectures making an appearance for the first time on an f-element.
#Chemistry #Actinides #f-elements
Challenging synthesis and some interesting new main group architectures making an appearance for the first time on an f-element.
#Chemistry #Actinides #f-elements
Uranium(III) and Uranium(IV) meta-Terphenylthiolate Complexes
We report the synthesis and characterization of crystalline m-terphenylthiolate uranium complexes supported by the bulky ligand system, SAriPr6 (SAriPr6 = {SC6H3-2,6-(Tripp)2}; Tripp = 2,4,6-iPr-C6H2)...
pubs.acs.org
February 15, 2025 at 9:16 AM
Happy to share Ben’s first full research article from his time in the group: pubs.acs.org/doi/10.1021/...
Challenging synthesis and some interesting new main group architectures making an appearance for the first time on an f-element.
#Chemistry #Actinides #f-elements
Challenging synthesis and some interesting new main group architectures making an appearance for the first time on an f-element.
#Chemistry #Actinides #f-elements