Tervalent uranium compounds

Drożdżyński, J.

doi:10.1016/j.ccr.2005.05.016

Cited by 32 publications

(19 citation statements)

References 137 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…4 was surely overlapped by the broad U(IV) band. Remarkably, an important increase in the absorbance in the 350-600 nm range was observed (see inset), together with a change of color in the suspension, from transparent to deep orange, which coincides with the reported absorbance of U(III) species [19,20,26,27], corresponding probably to a U(III)-HCOOH complex [28][29][30]. Other peaks corresponding to U(III) were not observed, surely due to a masking by the strong U(IV) signals [19,20].…”

Section: Heterogeneous Photocatalytic Experimentssupporting

confidence: 70%

Heterogeneous photocatalytic removal of U(VI) in the presence of formic acid: U(III) formation

Salomone

Meichtry

Litter

2015

Chemical Engineering Journal

View full text Add to dashboard Cite

Section: Heterogeneous Photocatalytic Experimentssupporting

confidence: 70%

Heterogeneous photocatalytic removal of U(VI) in the presence of formic acid: U(III) formation

Salomone

Meichtry

Litter

2015

Chemical Engineering Journal

View full text Add to dashboard Cite

“…Nach Vergleich des Tieftemperatur‐Absorptionsspektrums von 1 mit denen salzartiger U III ‐Verbindungen 21 lassen sich die Bandengruppen im MIR/NIR‐Bereich Übergängen zu den entsprechenden angeregten Multipletts der 5f 3 ‐Konfiguration zuordnen, wobei jedoch auffällt, dass die experimentellen energetischen Schwerpunkte teilweise bis zu ca. 2000 cm –1 zu niedrigeren Energien verschoben sind, was auf merklich verringerte Slater‐Parameter F 2 , F 4 , F 6 hinweist.…”

Section: Ergebnisse Und Diskussionunclassified

“…Die Einreihung von 1 in empirische nephelauxetische, relativistische nephelauxetische sowie spektrochemische Reihen von U III ‐Verbindungen ergibt sich durch Vergleich der hier erhaltenen Werte von F 2 , ζ 5f und N v /√\overline{4\pi} mit denen der ergänzten Tabelle 1 in Lit. 21 (s. Tabelle S1, Supporting Information).…”

Section: Ergebnisse Und Diskussionunclassified

See 1 more Smart Citation

Zur Elektronenstruktur hochsymmetrischer Verbindungen der f‐Elemente 44 [1]. Erstmalige parametrische Analyse des Absorptionsspektrums einer Molekülverbindung des trivalenten Urans: Tris[hydrotris(1‐pyrazolyl)borato]uran(III)

Apostolidis

Morgenstern

Rébizant

et al. 2009

Zeitschrift anorg allge chemie

View full text Add to dashboard Cite

The absorption spectrum of tris[hydrotris(1-pyrazolyl)borato]uranium(III) (UTp 3 ) was run at room and low temperatures. From the spectra obtained, a truncated crystal field (CF) splitting pattern could be derived, and simulated by fitting the free parameters of a phenomenological Hamiltonian achieving an r.m.s. deviation of 37.7 cm -1 for 29 assignments. The parameters used allow the insertion of the Tp ligand into empirical spectrochemical, nephelauxetic and EinleitungWährend der letzten Jahrzehnte wurden die Kristallfeld(KF)-Aufspaltungsmuster hunderter Festkörper und Salze [2-7] sowie dutzender Molekülverbindungen der trivalenten Lanthaniden (Ln) mit Liganden der Stöchiometrien [η 1 -CH(SiMe 3 ) 2

show abstract

“…The coordination chemistry of lanthanide and actinide ions with O-and/or N-donor ligands has advanced tremendously during past two decades [21][22][23][24]. The considerable interest of these ions, especially lanthanide ions, is due to their implications in optical imaging of cells, as luminescent chemosensors for medical diagnostics, contrast reagents for medical magnetic resonance imaging, shift reagents for NMR spectroscopy as well as their increasing utility in organic synthesis, bioorganic chemistry, and homogeneous catalysis [25,26].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, spectral, X-ray diffraction, antimicrobial studies, and DNA binding properties of binary and ternary complexes of pentadentate N2O3 carbohydrazone ligands

Shebl

Khalil

2014

Monatsh Chem

View full text Add to dashboard Cite

Two pentadentate carbohydrazone ligands, H 2 L 1 and H 2 L 2 , were prepared by the reaction of the bifunctional compound carbohydrazide with 2-hydroxy-5-nitrobenzaldehyde and 2-hydroxy-1-naphthaldehyde, respectively. Reactions of the ligands with oxovanadium(IV), cerium(III), thorium(IV), and dioxouranium(VI) ions yielded binary complexes. Reactions of the ligands with the dioxouranium(VI) ion in the presence of secondary ligands (8-hydroxyquinoline, glycine, salicylaldehyde, or benzoylacetone) yielded ternary complexes. The ligands and metal complexes were characterized by different techniques such as elemental and thermal analyses, IR, 1 H and 13 C NMR, electronic, ESR, mass spectra, and powder XRD as well as magnetic susceptibility and conductivity measurements. The coordinating sites are phenolic oxygen, azomethine nitrogen, and carbonyl oxygen. In complexes, the ligands act as dibasic pentadentate except ternary dioxouranium(VI) complexes, obtained using glycine or benzoylacetone, in which the ligands act as monobasic pentadentate. The XRD patterns for the H 2 L 1 ligand, its binary dioxouranium(VI) complex, and its 8-hydroxyquinoline ternary complex indicate crystalline nature and the grain size was estimated. The H 2 L 1 ligand and its binary complex have triclinic systems while the ternary complex has a monoclinic system with different unit-cell parameters. The ligands and some of their metal complexes showed antimicrobial activity toward some Gram-positive and Gram-negative bacteria, yeast (Candida albicans), and fungus (Aspergillus fumigatus), and MIC values were determined. The DNA binding properties of the oxovanadium(IV) complexes of H 2 L 1 and H 2 L 2 ligands were investigated by electronic absorption spectroscopy and viscosity measurements. The results indicated that these complexes bind to DNA via an intercalation binding mode with an intrinsic binding constant K b of 2.55 9 10 4 and 3 9 10 4 M -1 , respectively.

show abstract

Tervalent uranium compounds

Cited by 32 publications

References 137 publications

Heterogeneous photocatalytic removal of U(VI) in the presence of formic acid: U(III) formation

Heterogeneous photocatalytic removal of U(VI) in the presence of formic acid: U(III) formation

Zur Elektronenstruktur hochsymmetrischer Verbindungen der f‐Elemente 44 [1]. Erstmalige parametrische Analyse des Absorptionsspektrums einer Molekülverbindung des trivalenten Urans: Tris[hydrotris(1‐pyrazolyl)borato]uran(III)

Synthesis, spectral, X-ray diffraction, antimicrobial studies, and DNA binding properties of binary and ternary complexes of pentadentate N2O3 carbohydrazone ligands

Contact Info

Product

Resources

About