Hanna Oher

ORCID: 0000-0001-8806-2502
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About
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Research Areas
  • Radioactive element chemistry and processing
  • Lanthanide and Transition Metal Complexes
  • Radioactive contamination and transfer
  • Photochemistry and Electron Transfer Studies
  • Nuclear Materials and Properties
  • Electrochemical Analysis and Applications
  • Luminescence Properties of Advanced Materials
  • Analytical chemistry methods development
  • TiO2 Photocatalysis and Solar Cells
  • Atomic and Subatomic Physics Research
  • Catalysis and Oxidation Reactions
  • Machine Learning in Materials Science
  • Chalcogenide Semiconductor Thin Films
  • Advanced Chemical Physics Studies
  • Magnetism in coordination complexes
  • Atmospheric and Environmental Gas Dynamics
  • Organometallic Complex Synthesis and Catalysis
  • Spectroscopy and Quantum Chemical Studies
  • Spectroscopy Techniques in Biomedical and Chemical Research
  • CO2 Sequestration and Geologic Interactions
  • Ionic liquids properties and applications
  • Crystallization and Solubility Studies
  • Conducting polymers and applications
  • Nuclear materials and radiation effects
  • Chemical and Physical Properties in Aqueous Solutions

Université Paris-Saclay
2020-2024

Institut National de Physique Nucléaire et de Physique des Particules
2023-2024

Institut des Sciences Chimiques de Rennes
2022-2024

Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
2024

Centre National de la Recherche Scientifique
2017-2024

Nantes Université
2023

Université de Rennes
2023

Laboratoire de Physique Subatomique et des Technologies Associées
2022-2023

IMT Atlantique
2023

Laboratoire de Chimie Théorique
2019-2022

The luminescence spectra of triscarbonatouranyl complexes were determined by experimental and theoretical methods. Time-resolved laser-induced fluorescence spectroscopy was used to monitor uranyl bicarbonate solutions at 0.1 mol kgw-1 ionic strength pH ca. 8. concentrations Mg2+ Ca2+ in the samples chosen order vary proportions alkaline earth ternary MgUO2(CO3)32-, CaUO2(CO3)32-, Ca2UO2(CO3)3. spectrum each complex decomposition compare it with simulated model structures...

10.1021/acs.inorgchem.0c01986 article EN Inorganic Chemistry 2020-10-01

The luminescence properties of the [UO2Cl4]2– complex in an organic phase, especially influence large countercations, have been studied by time-resolved laser-induced fluorescence spectroscopy (TRLFS) and ab initio modeling. experimental spectrum was assigned vibronic Franck–Condon calculations on quantum chemical methods basis a combination relativistic density functional approaches. shape uranyl tetrachloride is determined symmetrical vibrations geometrical change upon emission. possible...

10.1021/acs.inorgchem.9b03614 article EN Inorganic Chemistry 2020-04-14

Protactinium ( Z = 91) is a very rare actinide with peculiar physico-chemical properties.

10.1039/d3cp00323j article EN cc-by-nc Physical Chemistry Chemical Physics 2023-01-01

Bent uranyl complexes can be formed with chloride ligands and 1,10-phenanthroline (phen) bound to the equatorial axial planes of uranyl(VI) moiety, as revealed by crystal structures, IR Raman spectroscopy, quantum-chemical calculations. With goal probing influence phenanthroline coordination enforcing bending on absorption emission spectra this complex, spin–orbit time-dependent density functional theory calculations for bare well free UO2Cl2 subunit UO2Cl2(phen)2 complex were performed. The...

10.1021/acs.inorgchem.3c00847 article EN Inorganic Chemistry 2023-06-06

Uranyl binitrate complexes have a particular interest in the nuclear industry, especially reprocessing of spent fuel. The modified PUREX extraction process is designed to extract U(VI) form UO2(NO3)2(L)2 as has been confirmed by extended X-ray absorption fine structure (EXAFS), diffraction (XRD), and time-resolved laser-induced fluorescence spectroscopy (TRLFS) measurements. In this study, L ligands are two molecules N,N-di-(ethyl-2-hexyl)isobutyramide (DEHiBA) monoamide used bind uranyl its...

10.1021/acs.inorgchem.1c02618 article EN Inorganic Chemistry 2021-12-09

We use state-of-the-art solid-state and molecular quantum mechanical calculations to predict a longer Pa–O mono-oxo bond than what was reported in the literature.

10.1039/d4cc04522j article EN Chemical Communications 2024-01-01

Bent uranyl complexes can be formed with chloride ligands and 1,10-phenanthroline (phen) bound to the equatorial axial planes of uranyl(VI) moiety, as revealed by crystal structures, IR Raman spectroscopy quantum chemical calculations. With goal probing influence phenanthroline coordination enforcing bending on absorption emission spectra this complex, spin-orbit time-dependent density functional theory calculations for bare well free UO2Cl2 subunit UO2Cl2(phen)2 ligand were performed. The...

10.26434/chemrxiv-2023-m3spw-v2 preprint EN cc-by-nc 2023-05-02

Bent uranyl complexes can be formed with chloride ligands and 1,10-phenanthroline (phen) bound to the equatorial axial planes of uranyl(VI) moiety, as revealed by crystal structures, IR Raman spectroscopy quantum chemical calculations. With goal probing influence phenanthroline coordination enforcing bending on absorption emission spectra this complex, spin-orbit time-dependent density functional theory calculations for bare well free UO2Cl2 subunit UO2Cl2(phen)2 ligand we performed. The has...

10.26434/chemrxiv-2023-m3spw preprint EN cc-by-nc 2023-03-07

The complexation of uranyl hydroxides with orthosilicic acid was investigated by experimental and theoretical methods. Spectroluminescence titration performed in a glovebox under argon atmosphere at pH 9.2, 10.5 11.5, [U(VI)] = 10-6 5 × mol kgw-1. polymerization effects silicic were minimized ruling out samples less than 90 % monomeric present, identified via UV-Vis spectrometry using the molybdate blue method. Linear regression analysis based on time-resolved laser-induced fluorescence...

10.2139/ssrn.4625233 preprint EN 2023-01-01
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