HESS Group
@HESS_Argonne
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Heavy Elements and Separation Sciences Group - @Argonne National Laboratory.
Illinois, USA
Joined December 2018
Understanding solution speciation of uranyl is critical for advancing chemical separations and sensing. In our latest work, we showed that N(CH₃)₄⁺ enhances uranyl–nitrate complexation, forming higher-order complexes vs. Na⁺/Li⁺/NH₄⁺ | RSC Advances
pubs.rsc.org
Understanding and manipulating uranyl speciation in aqueous solutions is critical for advancing chemical separation, sensing, and understanding environmental transport of uranyl. We report on the...
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On the cover of this week's issue: "Reactions of Np(VI) and Pu(VI) with Phenanthroline Result in Bending the [NpVIO2]2+ Unit and a Reduced Pu(V) Species" Read it here 🔗 https://t.co/LSDXhhr5Rc
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From X-rays in the lab to sun rays at a picnic — making the most of summer’s last warmth with the Heavy Element Chemistry and Separation Science Group at Argonne!
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We used small-angle X-ray scattering and molecular dynamics simulations to investigate organic phase structural changes upon contact with water in a model ternary system of water/alkane/extractant | The Journal of Physical Chemistry B
pubs.acs.org
Organic phase aggregation and phase splitting are two important (and connected) phenomena in liquid–liquid extraction of metal ions. Previously, we demonstrated how structure in binary mixtures of...
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A comprehensive study on uranyl luminescence quenching by various alkali metal and quaternary ammonium cations was investigated and is available now at Physical Chemistry Chemical Physics
pubs.rsc.org
The quenching of uranyl luminescence by various cation species was studied in aqueous media at low pH. Solutions with different nitrate salts, held at constant uranyl nitrate, nitric acid, and ion...
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Here at Argonne, we synthesize compounds both down the alkali metal group and across the actinide period. Check out a comprehensive series of alkali tris(acetato)actinyl(VI) (U, Np, Pu) compounds | European Journal of Inorganic Chemistry
chemistry-europe.onlinelibrary.wiley.com
Alkali tris(acetato) actinyl(VI) complexes of different actinyls and identical alkali metals are mostly isostructural, showing a redshift in the symmetric actinyl stretch across the actinide series....
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It's on the cover too!
Reactions of Studtite UO4·4H2O in Alkali Hydroxides: Isolation of Single-Crystal Uranate Phases under Mild Hydrothermal Conditions | Crystal Growth & Design
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#ChemPhysChem Using synchrotron X-rays & sum frequency generation spectroscopy, @HESS_Argonne group demonstrate how trivalent rare earths enhance surface deprotonation and drive interfacial water ordering, with insights into REE separations #openaccess 🔓
chemistry-europe.onlinelibrary.wiley.com
This study explores neodymium (Nd) adsorption on Langmuir monolayers of octadecylphosphonic acid (ODPA) at the air/water interface. Using sum frequency generation spectroscopy and X-ray fluorescence...
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Reactions of Np(VI) and Pu(VI) with Phenanthroline Result in Bending the [NpVIO2]2+ Unit and a Reduced Pu(V) Species | Journal of the American Chemical Society
pubs.acs.org
Despite decades of actinyl chemistry, genuinely bent actinyl structures remain rare beyond uranium. We report the first crystallographic characterization of a bent neptunyl(VI) complex, NpO2Cl2(phe...
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“Direct observation of carbon dioxide adsorption and binding at the air/aqueous interface” is published in March issue of @PNASNexus. Great work by @MokhtarMrashwan . Wonderful collaboration with @NymanMay. @HESS_Argonne
https://t.co/TyaRLcu0RU
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Registration is officially open for the 30th Rare Earth Research Conference held at Argonne National Laboratory, June 15th-19th, 2025! Visit our website for more information: https://t.co/2Mz7D0xgmY
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Secretary Wright signed his first Secretarial Order this afternoon to kickstart the golden era of American energy dominance.
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Discover how bolaamphiphile-based nanotubes exhibit exceptional efficiency in adsorbing Cu(II) ions, paving the way for advanced chemical separations and catalysis. @KStateChemistry @HESS_Argonne | Langmuir
pubs.acs.org
Self-assembled organic nanotubes (ONTs) have been actively examined for various applications such as chemical separations and catalysis owing to their well-defined tubular nanostructures with...
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PCET is straight up ✨ magic✨! @EmilyMikeska isolated two unconventional polynuclear complexes of Np featuring mono-µ2-oxo motifs accessed by proton-coupled electron transfer (PCET) reactivity | Chemistry A European Journal https://t.co/Vsyha3Jpxw
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Group outing and a farewell lunch for two of our outstanding postdocs! Tasnim Rahman and Xiaoyu (Andy) Wang, we wish you good luck in your upcoming professional careers!
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Stoichiometric Lanthanide Compounds with Diglycolamides: A Synthetic Approach toward Understanding Rare-Earth Speciation in Solution | Inorganic Chemistry https://t.co/fYaHkDs6nI
@KravchukChem @HESS_Argonne
pubs.acs.org
A fundamental understanding of coordination chemistry across the lanthanide series is essential for explaining the chemical behavior of rare-earth metals in complex liquid–liquid extraction process...
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Redox chemistry of high-valent transuranic elements in non-aqueous media has received far less attention than it deserves. Our latest study on electrochemistry of Np(VI)/Np(V) in organic media is out now in @DaltonTrans | https://t.co/K7m3eIUgdX
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In our latest work, we used a combined experimental and computational approach to measure lanthanide solvation free energy landscapes in complex systems. Out now in @ChemicalScience | https://t.co/vn6y0n22Vu
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@KravchukChem cranking out some serious Pu compounds. Taking a lead from @EmilyMikeska and making Texas sized crystals!
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