Rare earth–metal bonding in molecular compounds: recent advances, challenges, and perspectives

2015 ◽  
Vol 39 (10) ◽  
pp. 7544-7558 ◽  
Author(s):  
Mikhail V. Butovskii ◽  
Rhett Kempe
Keyword(s):  
Rare Earth ◽  
Rare Earth Metal ◽  
Rare Earth Metals ◽  
Earth Metal ◽  
Main Group ◽  
Metal Bonding ◽  
Main Group Metals ◽  
Recent Advances ◽  
Molecular Compounds

In this review, all structurally authenticated molecular compounds with direct bonds between rare earth metals and transition or main group metals are summarized. Novel aspects of their syntheses, properties and reactivities are highlighted.

scholarly journals Highly efficient stabilisation of meta-ethynylpyridine polymers with amide side chains in water by coordination of rare-earth metals

2015 ◽  
Vol 13 (6) ◽  
pp. 1700-1707 ◽  
Author(s):  
Hiroki Makida ◽  
Hajime Abe ◽  
Masahiko Inouye
Keyword(s):  
Rare Earth ◽  
Rare Earth Metal ◽  
Rare Earth Metals ◽  
Earth Metal ◽  
Helical Structure ◽  
Metal Salts ◽  
Side Chains ◽  
Highly Efficient

An amphiphilic meta-ethynylpyridine polymer with chiral amide side chains coordinated with rare-earth metal salts, especially strongly with Sc(iii), to stabilise its helical structure with CD enhancement.

scholarly journals Stability Constant of Rare Earth Metals with Substituted Thiazoles at 298.15K

2016 ◽  
Vol 64 ◽  
pp. 106-109
Author(s):  
A.B. Naik ◽  
M.S. Poharkar
Keyword(s):  
Rare Earth ◽  
Ionic Strength ◽  
Stability Constant ◽  
Rare Earth Metal ◽  
Rare Earth Metals ◽  
Sodium Perchlorate ◽  
Earth Metal ◽  
Water Mixture ◽  
Dissociation Process ◽  
The Stability

The stability constant on complexation of rare earth metal ions Eu (III), Gd (III), Nd (III) and Tb (III) with substituted thiazole in 70% Dioxane (Dx)-water mixture have been determined by a pH and spectrophotometric method at 298.15K and ionic strength 0.1mol.dm-3(sodium perchlorate). At constant temperature, the stability constant of the formed complexes decreases in the order Tb (III), Gd (III), Eu (III), Nd (III). The dissociation process is non-spontaneous, endothermic and entrophically unfavorable while formation of metal complexes has been found to be spontaneous, endothermic and entrophically favorable.

Azopyridine-based chiral oxazolines with rare-earth metals for photoswitchable catalysis

2021 ◽  
Author(s):  
Kento Nakamura ◽  
Masaru Kondo ◽  
Chandu G Krishnan ◽  
Shinobu Takizawa ◽  
Hiroaki Sasai
Keyword(s):  
Rare Earth ◽  
Rare Earth Metal ◽  
Rare Earth Metals ◽  
Earth Metal ◽  
Group Coordination ◽  
Azo Group ◽  
Re Catalyst

An azopyridine-based oxazoline was developed for utilizing azo group coordination and isomerization as a photoswitchable ligand. The ligand coordinated to rare-earth metal (RE) catalyst underwent efficient E/Z photoisomerization, suggesting tri-...

Recent Advances in Rare Earth Metal Triflate Catalyzed Organic Synthesis in Green Media

ChemInform ◽  
2005 ◽  
Vol 36 (33) ◽  
Author(s):  
Sanzhong Luo ◽  
Lizhi Zhu ◽  
Arindam Talukdar ◽  
Guisheng Zhang ◽  
Xueling Mi ◽  
...  
Keyword(s):  
Rare Earth ◽  
Organic Synthesis ◽  
Rare Earth Metal ◽  
Earth Metal ◽  
Recent Advances

Heterometallic Clusters with Multiple Rare Earth Metal–Transition Metal Bonding

2021 ◽  
Vol 143 (15) ◽  
pp. 5998-6005
Author(s):  
Kaiying Shi ◽  
Iskander Douair ◽  
Genfeng Feng ◽  
Penglong Wang ◽  
Yue Zhao ◽  
...  
Keyword(s):  
Rare Earth ◽  
Transition Metal ◽  
Rare Earth Metal ◽  
Earth Metal ◽  
Heterometallic Clusters ◽  
Metal Bonding ◽  
Transition Metal Bonding

scholarly journals Biotechnical toxicity assessment system of rare earth metals compounds

2020 ◽  
pp. 56-67
Author(s):  
M. I. Semenova ◽  
◽  
A. V. Smirnov ◽  
A. Sokolov ◽  
A. S. Kovalevskaya ◽  
...  
Keyword(s):  
Rare Earth ◽  
Human Health ◽  
Rare Earth Metal ◽  
Rare Earth Metals ◽  
Safety Data ◽  
Earth Metal ◽  
Toxicity Assessment ◽  
Hazardous Substances ◽  
Metal Compounds ◽  
Modern Methods

Introduction. Expanding the scope of application of rare-earth metal compounds that are unique in their properties increases the interest of many researchers in studying the impact of rare-earth metals and their compounds on human health and the environment. One of the most relevant and modern methods for assessing the safety of the studied media for a biological test object is bioassay. Problem Statement. The objective necessity of determining the combined effect of rare earth metals and their compounds on human health and the environment involves the use of biological systems. Modern methods of bioassay are extremely sensitive, which is sufficient to determine sub-threshold concentrations of hazardous substances in accordance with international standards. Thus, the use of these methods can make it possible to determine the index and the degree of toxicity of rare earth metal compounds with high accuracy in order to prepare a package of necessary documentation on industrial safety of products. Theoretical Part. Based on the studied toxicological effects of rare earth metals, the authors proposed to conduct a toxicity assessment based on the concept of biotechnical systems. The object of research was oxides and carbonates of rare earth metals. The results of the study to determine the index and the degree of toxicity of rare earth metal compounds, as well as to assess the lethal concentration of LC50 (24 h) by biotesting using test organisms Paramecium Caudatum were used to write a safety data sheet for cerium oxide and carbonate. Conclusion. The studies have shown that a certain modification of the technical solutions embedded in the devices of the Biotester series makes it possible to correctly solve the problem of assessing the toxicity of rare earth metals and their compounds. Based on the research results, the safety data sheets were developed.

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