Review
Chemistry, Inorganic & Nuclear
Daniele Paderni, Luca Giorgi, Vieri Fusi, Mauro Formica, Gianluca Ambrosi, Mauro Micheloni
Summary: Rare earth elements (REEs) are a group of elements playing critical roles in modern applications, with scientists showing strong interests in their new applications. However, the development of chemical sensors suitable for selective sensing of REE ions remains a challenging task due to their complicated coordination properties.
COORDINATION CHEMISTRY REVIEWS
(2021)
Article
Chemistry, Multidisciplinary
Noah Schwarz, Xiaofei Sun, Ravi Yadav, Ralf Koeppe, Thomas Simler, Peter W. Roesky
Summary: Divalent lanthanide and alkaline-earth complexes supported by N-heterocyclic carbene (NHC) ligands were synthesized through redox-transmetalation, with the size of NHC ligands playing a key role in determining the product structures, likely due to intermolecular repulsions in the solid state. Computational studies suggest solid-state effects contribute to differences in the formation of these complexes.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Review
Chemistry, Organic
Alexis Prieto, Florian Jaroschik
Summary: Photoredox catalysis offers a new paradigm for synthesizing a wide range of chemical bonds using abundant reagents under mild conditions. The use of rare-earth complexes as redox-active centers or redox-neutral Lewis acids has emerged as a promising strategy in the field, facilitating photocatalytic transformations.
CURRENT ORGANIC CHEMISTRY
(2022)
Article
Environmental Sciences
Mathieu Desrosiers, Guillaume Pelletier, Denis Dieme, Jonathan Cote, Malek Jomaa, Andy Nong, Michele Bouchard
Summary: Toxicokinetic models are developed for four rare earth elements to establish biomonitoring equivalents (BE) as biological guidance values, based on experimental kinetic data showing disappearance from blood, accumulation in liver, and excretion mainly through feces. The model with 19 compartments fits well with experimental data and can be used for other REEs modeling. BEs of Pr and Nd were derived from provisional RfD, allowing for rapid screening and risk assessments in different populations.
ENVIRONMENT INTERNATIONAL
(2021)
Article
Plant Sciences
Kexiao Song, Jinzhu Gao, Shuo Li, Yunfu Sun, Haoyang Sun, Baiyu An, Tianming Hu, Xueqing He
Summary: Rare earth elements (REEs) at high concentrations can be toxic to plant growth, but treatments with lanthanum, cerium, and terbium also showed positive effects on seed germination and root length while decreasing chlorophyll content in alfalfa seedlings. In vitro experiments and quantum chemical calculations demonstrated that the decrease in chlorophyll content was caused by reactions between REEs and chlorophyll, leading to the formation of lanthanides-chlorophyll complexes.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Chemistry, Applied
Lara H. Polak, John B. Soltys, Kai C. Hultzsch
Summary: The intermolecular anti-Markovnikov hydroamination of vinylsilanes was successfully achieved using five silyl-substituted ortho-terphenoxide yttrium complexes, resulting in excellent activity and complete anti-Markonikov selectivity.
ADVANCED SYNTHESIS & CATALYSIS
(2023)
Article
Energy & Fuels
James C. Hower, John G. Groppo, Heileen Hsu-Kim, Ross K. Taggart
Summary: The distribution of Rare Earth elements (REE) in coal-derived fly ashes varies depending on the coal source and basins. Different coal types exhibit variations in REE concentration and distribution in fly ashes. The signature of REE in fly ashes can be indicative of their behavior in extraction processes, but the actual distribution may differ between fly ashes from different basins.
Article
Chemistry, Physical
Shuqi Dong, Jinjin Chen, Kening Qiao, Jian Fang, Yan Yang, Laurent Maron, Bo Liu
Summary: This study focused on using rare-earth metal bisalkyl complexes to catalyze hydroamination reactions and investigated Th, Tb, and Gd-based catalysts for the first time. It was found that in intramolecular hydroamination, an increase in metal ion radius led to a linear increase in rate, while the reactivity pattern in intermolecular hydroamination showed the opposite trend with respect to ionic radius size.
Article
Biochemistry & Molecular Biology
Jakub J. Zakrzewski, Michal Heczko, Robert Jankowski, Szymon Chorazy
Summary: Functional molecule-based solids built of metal complexes can demonstrate significant changes in their optical properties under external stimuli. A novel molecular material, obtained through self-assembly of metal ions in the presence of a ligand, showed reversible changes in luminescent features such as emission components and lifetime values at room temperature by altering relative humidity.
Article
Chemistry, Physical
David Mendez-Mateos, V. Laura Barrio, Jesus M. Requies, Jose F. Cambra
Summary: This study investigates the effects of adding alkaline earth metals and lanthanides on the conversion of CO2 to methane in catalysts. The inclusion of La improves methane yield and enhances resistance to H2S deactivation.
Article
Chemistry, Physical
Alexander N. Selikhov, Anton V. Cherkasov, Yulia V. Nelyubina, Alexander A. Trifonov
Summary: This article reports the synthesis and structures of two thermally stable base-free heterobimetallic benzhydryl complexes, which showed unprecedented catalytic activity and regioselectivity in intermolecular olefin hydroamination, involving a broad scope of substrates.
Article
Chemistry, Applied
M. Rucki, K. Kejlova, A. Vlkova, D. Jirova, M. Dvorakova, L. Svobodova, H. Kandarova, S. Letasiova, H. Kolarova, M. Mannerstrom, T. Heinonen
Summary: The study aimed to investigate the toxicological profile of rare earth elements salts (REEs) through a series of experiments evaluating cytotoxicity, environmental toxicity, skin irritation and corrosion potential, mutagenicity, endocrine disruption, and skin sensitization. The results showed that the tested REEs have no potential for mutagenicity or skin sensitization, but exhibit acute and chronic toxic effects on the aquatic environment.
JOURNAL OF RARE EARTHS
(2021)
Review
Polymer Science
Gabriel Salfate, Julio Sanchez
Summary: The demand for rare earth elements (REEs) has been increased by contemporary industrial processes and the application of new technologies. However, the increased mining of REEs has led to a supply crisis. Researchers have recently started considering the viability of recovering REEs from secondary sources such as mining wastewaters and acid mine drainage. In order to find more sustainable processes, the performance of various adsorption/ion exchange materials in capturing REEs from water sources is being evaluated.
Review
Environmental Sciences
Truong Dinh, Zsolt Dobo, Helga Kovacs
Summary: The increasing demand for rare earth elements in modern industry has led to a surge in mining activities and the release of these metals into the environment. Phytomining, as an environmentally-friendly technique, can extract rare earth elements from contaminated soils where traditional mining is not competitive.
Article
Chemistry, Inorganic & Nuclear
Maxim A. Lutoshkin, Alexander Petrov, Yuriy N. Malyar, Alexandr S. Kazachenko
Summary: This work demonstrates the relationships between stability constants and various parameters for complexes of some 1,3-diketones. The studied ligands, although having similar pKa values, exhibit significant differences in the stabilities of their complexes. The systematic analysis of 64 apparent stability constants shows that the interaction between metals and nonsymmetric beta-diketones increases in strength in the order of 2-furoyltrifluoroacetone < 2-thenoyltrifluoroacetone < benzoyltrifluoroacetone < 2-naphthyltrifluoroacetone.
INORGANIC CHEMISTRY
(2021)