Article
Chemistry, Multidisciplinary
Ronja Christoffels, Carina Breitenbach (nee Stastny), Jean Patrick Weber, Lisa Koertgen, Christian Tobeck, Michael Wilhelm, Sanjay Mathur, Jorg-Martin Neudoerfl, Majied Sadegh Zadeh Farid, Melisa Maslo, Erik Strub, Uwe Ruschewitz
Summary: The reaction of UO2(NO3)(2)·6H(2)O with partially fluorinated H-3-3F-BTB in DMF leads to the formation of a new metal-organic framework UoC-3, which exhibits high porosity and crystallinity. Different organic cations did not show templating effect on the synthesis of this MOF. UoC-3 was successful in removing approximately 96% of radioactive Cs-137(+) from aqueous solutions.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Chemistry, Multidisciplinary
Cihang Yu, Bruno A. Piscelli, Nawaf Al Maharik, David B. Cordes, Alexandra M. Z. Slawin, Rodrigo A. Cormanich, David O'Hagan
Summary: Theory and solution NMR studies have shown that the expected tri-equatorial conformation is adopted by all-syn 1,3,5-trifluorocyclohexane 5. However, in the solid state, a more polar triaxial conformation is observed. This study investigates the preferred conformations of substituted derivatives of 5 (Me, OMe, NH(CO)Me, NHBoc) to gain insight into the triaxial C-F preferences.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
David Schnable, Nathan D. Schley, Gael Ung
Summary: This research presents the first reported example of a chiral molecular uranyl complex in solution exhibiting circularly polarized luminescence. The uranyl chiroptical activity is enabled by complexation with the chiral carboxylate ligand ibuprofen. The binding of sodium ibuprofenate salts with [UO2Cl2(thf)(2)](2) creates tris complexes that display luminescent properties under visible and UV excitation.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Shyamkumar V. Haridas, Max von Delius
Summary: The synthesis of all-cis fluorinated cyclohexanes with three hydroxy, ether or ester functionalities in the non-fluorinated positions is reported. These tripodal molecules have a high dipole moment of up to 6.3 debye and were successfully used to bind anions and form gels.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Anna A. Berseneva, Mina Aziziha, Juliano Schorne-Pinto, Theodore M. Besmann, Hans-Conrad zur Loye
Summary: Fast and effective uranyl sequestration is of great importance in the nuclear industry. This study explores the use of layered chalcogenide materials as potential sorbents for uranyl remediation. The researchers obtained three new all-inorganic open-framework chalcogenides with promising sorption properties. The structures of these chalcogenides were characterized, and their stability and uranyl sorption capacity were investigated. Results showed that the chalcogenide framework, combined with effective bonding interactions, makes it a suitable sorbent for uranyl removal from aqueous media.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Physical
Sadia Farooq, Ajaz Hussain, Muhammad Yar, Muhammad Tariq, Khalid Mahmood, Khurshid Ayub, Riaz Hussain, Faiz Rasool, Muhammad Imran, Mohammed A. Assiri
Summary: Here, a novel class of transition metalide compounds with excess electrons have been designed, which are considered as potential candidates for nonlinear optical materials. Theoretical studies showed that these complexes have large dipole moments, high hyperpolarizabilities, and thermodynamic stability. Furthermore, the nonlinear optical response and scattering properties of these complexes have been evaluated, confirming their unique characteristics.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Multidisciplinary
Tonya Vitova, Radmila Faizova, Jorge Amaro-Estrada, Laurent Maron, Tim Pruessmann, Thomas Neill, Aaron Beck, Bianca Schacherl, Farzaneh Fadaei Tirani, Marinella Mazzanti
Summary: The stabilization of uranyl(V) by Fe(II) in natural systems is still a subject of debate. We demonstrate that the covalency of the U(V)-oaxial bond decreases when bound to Fe(II), leading to redirection of electron density and increased covalency of the U(V)-equatorial bonds. This increased covalent interaction between U(V) and equatorial ligands due to iron binding contributes to the higher stability of uranyl(V).
Article
Chemistry, Multidisciplinary
Xue-Yi Qiao, Yang Wang, Zi-Xin You, Chen Wang, Yong-Heng Xing, Feng-Ying Bai, Li Xian Sun
Summary: Different trans-dioxido uranyl frameworks were synthesized and characterized, showing distinct structures and coordination environments. Complex 1 exhibited the highest removal rate of methylene blue, indicating its potential for dye adsorption applications.
Article
Chemistry, Inorganic & Nuclear
Mikaela Mary F. Pyrch, Jennifer L. Bjorklund, James M. Williams, Maguire Kasperski, Sara E. Mason, Tori Z. Forbes
Summary: In this study, the impact of hydrogen bonding networks on the vibrational modes of the uranyl cation in hexavalent uranium materials was investigated. The synthesis and structural characterization of five novel compounds revealed that slight changes in crystalline packing and hydrogen bonding networks result in modifications of the vibrational modes, as observed by infrared and Raman spectroscopy.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Joshua L. Clark, Alaric Taylor, Ailsa Geddis, Rifahath M. Neyyappadath, Bruno A. Piscelli, Cihang Yu, David B. Cordes, Alexandra M. Z. Slawin, Rodrigo A. Cormanich, Stefan Guldin, David O'Hagan
Summary: This study investigates the conformations and molecular packing of alkyl all-cis 2,3,4,5,6-pentafluorocyclohexyl motifs using X-ray crystallography, theory, and Langmuir isotherm analysis. The results suggest that this ring system has the potential to be a motif for ordering supramolecular assembly.
Article
Chemistry, Inorganic & Nuclear
Ge-Hua Wen, Xiu-Mei Chen, Kui Xu, Xiaoji Xie, Song-Song Bao, Li-Min Zheng
Summary: This study reported two luminescent uranyl phosphonates, which can be used for temperature sensing in the ranges of 120-300 K and 100-280 K, through exfoliation to form nanosheets of two-layer thickness and serving as thermometers.
DALTON TRANSACTIONS
(2021)
Review
Chemistry, Multidisciplinary
Lukasz Polewski, Andreas Springer, Kevin Pagel, Christoph A. Schalley
Summary: Ion mobility spectrometry and gas-phase IR action spectroscopy are two popular structure-sensitive mass-spectrometric methods for investigating supramolecular assemblies. These methods can distinguish isomers, reveal subtle structural details, and study amino acid complexes and peptide assemblies.
ACCOUNTS OF CHEMICAL RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Xiuxiu Wang, Zong-Chang Han, Wei Wei, Hanshi Hu, Pengfei Li, Peiqing Sun, Xiangzhi Liu, Zhijia Lv, Feng Wang, Yi Cao, Zijian Guo, Jun Li, Jing Zhao
Summary: Metal clusters, such as iron-sulfur clusters, play important roles in sustaining life and metalloprotein functions. In this study, the formation and crystal structure of a planar square tetranuclear silver cluster were reported when silver ions were mixed with human copper chaperone Atox1. Quantum chemical studies revealed that the tetranuclear silver cluster has an aromatic all-metal structure, representing the first observation of such structure in a protein.
Article
Chemistry, Multidisciplinary
Yugang Zhang, Xia Wang, Kexin Xu, Fuwan Zhai, Jie Shu, Ye Tao, Junren Wang, Lisha Jiang, Liangwei Yang, Yaxing Wang, Wei Liu, Jing Su, Zhifang Chai, Shuao Wang
Summary: In this study, a uranyl sensitization approach was proposed to enhance the luminescence efficiency of lanthanide organic frameworks (Ln-MOFs) in a distinct heterobimetallic uranyl-europium organic framework. The record-breaking photoluminescence quantum yield (PLQY, 92.68%) among all reported Eu-MOFs was achieved by nearly 100% energy transfer efficiency between UO2 (2+) and Eu3+. The overlap of excited state levels between UO2 (2+) and Eu3+ was confirmed to be responsible for the efficient energy transfer process.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Inorganic & Nuclear
Jerome Kretzschmar, Satoru Tsushima, Christian Lucks, Elisabeth Jaeckel, Ronny Meyer, Robin Steudtner, Katharina Mueller, Andre Rossberg, Katja Schmeide, Vinzenz Brendler
Summary: This research investigates the interactions between the uranyl(VI) ion and citric acid using multiple spectroscopic techniques and computational methods, revealing the existence of two diastereomers of a dimeric complex and their interconversion in acidic solution. Furthermore, ternary dimeric and trimeric complexes were identified at higher pH values. The study also challenges previous misconceptions in the aqueous U(VI)-citric acid solution chemistry and provides a basis for future studies on U(VI) complexation.
INORGANIC CHEMISTRY
(2021)