Transuranium Inorganic Chemistry

Polinski, Matthew J.; Burns, Peter C.; Albrecht‐Schmitt, Thomas E.

doi:10.1016/b978-0-08-097774-4.00226-6

Cited by 5 publications

(3 citation statements)

References 72 publications

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“…More recent sources contain wide information on the chemistry of the actinides and the half-life of their isotopes, with partial structural information. [2][3][4] In one review, for instance, the coordination spheres of actinides is discussed for non-molecular solids only, [4] another paper [5] reviews the structures of Th(IV) compounds based on coordination number, discussing each compound independently without establishing patterns and yet another discusses the structural trends in actinide(IV) chloride compounds. [6] It seems to be a common belief that the preference for high coordination numbers is similar for lanthanides and actinides, as stated in a review on actinide complexes: «Actinide ions display relatively large ionic radii and therefore support higher coordination numbers; coordination numbers of 8-10 are common and 12-and 14-coordinate metal centers have been observed».…”

Section: Introductionmentioning

confidence: 99%

Continuous Shape Measures Study of the Coordination Spheres of Actinide Complexes – Part 1: Low Coordination Numbers

Álvarez

2021

Eur J Inorg Chem

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Structural analyses of a large set of molecular structures of actinide compounds allow us to establish trends for stereochemical preferences, common distortion paths, geometrical constraints imposed by different ligand topologies, and the existence of incipient bonds or of Van der Waals intramolecular interactions on purportedly vacant coordination sites. In this study the relative abundance of coordination numbers in actinide chemistry appears to be on average higher than that among the lanthanides. The detailed continuous shape measures study of normalized coordination polyhedra with coordination numbers between 1 and 6 presented here is based on more than 1,800 solid state and gas phase structural data sets.

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Section: Introductionmentioning

confidence: 99%

Continuous Shape Measures Study of the Coordination Spheres of Actinide Complexes – Part 1: Low Coordination Numbers

Álvarez

2021

Eur J Inorg Chem

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“…The development of well-defined chemical uses for the long-lived radionuclides of the nuclear fuel cycle, namely the product of front-end enrichment processes (e.g., 238 U), provides incentives for reprocessing these waste streams. Uranium is well-suited to participate in challenging multielectron molecular transformations, due to its ability to access a variety of oxidation states (U 2+ , U 3+ , U 4+ , U 5+ , U 6+ ). − The basis for the rich redox chemistry of this early actinide has been credited to the ability of 5f-orbitals to hybridize with 6d-orbitals. − A number of examples of multielectron, catalytic small molecule activation processes by heterogeneous actinide-derived materials have been reported. This field of research traces back to a seminal breakthrough in 1909 when Haber first employed uranium as a heterogeneous catalyst for ammonia synthesis from N 2 and H 2 under high pressure and temperature .…”

Section: Introductionmentioning

confidence: 99%

Molecular Models of Atomically Dispersed Uranium at MoS₂ Surfaces Reveal Cooperative Mechanism of Water Reduction

Patra,

Brennessel,

Matson

2024

J. Am. Chem. Soc.

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Single atoms of uranium supported on molybdenum sulfide surfaces (U@MoS 2 ) have been recently demonstrated to facilitate the hydrogen evolution reaction (HER) through electrocatalysis. Theoretical calculations have predicted uranium hydroxide moieties bound to edge-sulfur atoms of MoS 2 as a proposed transition state involved in the HER process. However, the isolation of relevant intermediates involved in this process remains a challenge, rendering mechanistic hypotheses unverified. The present work describes the isolation and characterization of a uranium-hydroxide intermediate on molybdenum sulfide surfaces using [(Cp* 3 Mo 3 S 4 )UCp*], a molecular model of a reduced uranium center supported at MoS 2 . Mechanistic investigations highlight the metalloligand cooperativity with uranium involved in the water activation pathway. The corresponding uraniumoxo analogue, [(Cp* 3 Mo 3 S 4 )Cp*U(�O)], was also accessed from the hydroxide cluster via hydrogen atom transfer and from [(Cp* 3 Mo 3 S 4 )UCp*] through an alternative direct oxygen atom transfer. These results provide an atomistic perspective on the reactivity of low-valent uranium at molybdenum sulfide surfaces toward water, modeling key intermediates associated with the HER of U@MoS 2 catalysts.

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“…Pozostałe obiekty, będące przedmiotem badań archeologicznych, są rozpoznane w stopniu o wiele bardziej zaawansowanym, choć nadal na wiele pytań nie udało się odpowiedzieć. Część z nich doczekała się monografii, na przykład Pień (Poliński 2013), Bezławki (Bezławki 2013) i Puck (Kruppé, Milewska 2014).…”

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Formy siedzib średnich i niższych rangą urzędników krzyżackich w granicach obecnej Polski

Knyżewski

2019

AHP

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Formy siedzib średnich i niższych rangą urzędników krzyżackich w granicach obecnej Polski Forms of medium and lower rank Teutonic Order officials' seats within the borders of present PolandZarys treści. Spośród około 70 siedzib średnich i niższych rangą urzędników krzyżackich (wójtów, prokuratorów, leśnych, rybickich oraz nienależących do korporacji zakonnej komorników) w granicach obecnej Polski blisko połowa była przedmiotem badań archeologicznych, jednak stan rozpoznania znacznej ich części jest niewystarczający. Należy jednak stwierdzić, że mimo tego zastrzeżenia można sformułować pewne wnioski. Wspomniane siedziby były bardzo zróżnicowane pod względem form i funkcji. Wśród nich możemy wyróżnić monumentalne obiekty o charakterze pałacowym (np. nieregularny zamek w Sztumie), niewielkie, murowane wieże mieszkalno-obronne (np. zamek w Ełku), budowle o lżejszych konstrukcjach (siedziba prokuratora w Pniu), a także zamki nawiązujące formą do kaszteli konwentualnych (zamek w Szczytnie). Obecny stan badań zmusza do rewizji rozpowszechnionego w literaturze poglądu, że zamki wójtowskie były większe od prokuratorskich, najmniejsze zaś były siedziby leśnych, rybickich i komorników. Zdarzało się, że siedziby wójtów były mniejsze niż prokuratorów. Niektóre zamki prokuratorskie dorównywały skalą dużym założeniom wójtowskim, a siedziby leśnych, rybickich i komorników nie odbiegały od wielu siedzib prokuratorów. Z tego względu nie należy stosować określeń: "model zamku wójtowskiego", "model zamku prokuratorskiego" albo "model zamku komornickiego".Słowa kluczowe: zamki krzyżackie, stan badań, dwory krzyżackie, Prusy krzyżackie, architektura obronna, średniowiecze, archeologia.

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Transuranium Inorganic Chemistry

Cited by 5 publications

References 72 publications

Continuous Shape Measures Study of the Coordination Spheres of Actinide Complexes – Part 1: Low Coordination Numbers

Continuous Shape Measures Study of the Coordination Spheres of Actinide Complexes – Part 1: Low Coordination Numbers

Molecular Models of Atomically Dispersed Uranium at MoS₂ Surfaces Reveal Cooperative Mechanism of Water Reduction

Formy siedzib średnich i niższych rangą urzędników krzyżackich w granicach obecnej Polski

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Transuranium Inorganic Chemistry

Cited by 5 publications

References 72 publications

Continuous Shape Measures Study of the Coordination Spheres of Actinide Complexes – Part 1: Low Coordination Numbers

Continuous Shape Measures Study of the Coordination Spheres of Actinide Complexes – Part 1: Low Coordination Numbers

Molecular Models of Atomically Dispersed Uranium at MoS2 Surfaces Reveal Cooperative Mechanism of Water Reduction

Formy siedzib średnich i niższych rangą urzędników krzyżackich w granicach obecnej Polski

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Molecular Models of Atomically Dispersed Uranium at MoS₂ Surfaces Reveal Cooperative Mechanism of Water Reduction