Six tetranuclear complexes $[\text{Fe}{(\text{III})}_{3}\text{Ln}{({\ensuremath{\mu}}_{3}\text{-O})}_{2}{({\text{CCl}}_{3}\text{COO})}_{8}({\text{H}}_{2}\text{O}){(\text{THF})}_{3}]\ensuremath{\cdot}\text{THF}\ensuremath{\cdot}{\text{C}}_{7}{\text{H}}_{16}$ [$\text{Ln}=\text{Gd}(\text{III})$ (1), Tb(III) (2), Dy(III) (3), Ho(III) (4), Y(III) (5), and Lu(III) (6)] have been studied by magnetic susceptibility M\"ossbauer spectroscopy. These isostructural molecules a ``butterfly'' structure...

Population growth has led to an increased demand for raw minerals and energy resources; however, their supply cannot easily be provided in the same proportions. Modern technologies contain materials that are becoming more finely intermixed because of broadening palette elements used, this outcome creates certain limitations recycling. The recovery separation individual elements, critical valuable metals from complex systems requires energy-consuming solutions with many hazardous chemicals...

Permanent magnets today are used in a wide range of transportation, industrial, residential/commercial, consumer electronics, defense, domestic, data storage, wind energy, and medical markets applications. There five classes commercial permanent magnet materials; however, based on Nd-Fe-B account for over 60% the global production by value. They typically contain around 31 wt.% rare earth elements (REEs), principally, Nd Pr, plus Dy higher-temperature performance. forecast to grow throughout...

Rare-earth elements (REEs) are increasingly susceptible to supply risks due their limited geographical availability and growing demand in clean energy applications such as neodymium-iron-boron (NdFeB) magnets used electric vehicles wind turbines. When NdFeB produced, 6–73% of swarf is generated during the manufacturing steps. This paper presents an innovative technology that utilizes copper nitrate dissolve REEs magnet subsequently recovers ∼97% them mixed rare-earth oxides (REOs) purity...

A nonanuclear {Fe(6)Dy(3)} coordination cluster displaying SMM behaviour in which an unprecedented chemical transformation provides structural information for the existence of 1,1,2,2-tetrahydroxyethane is reported.

Abstract A novel approach for sorting electric motors without dismantling them is reported in this article. This increases the likelihood that a motor selected from mixture recycling would contain rare earth elements (REEs), which are pivotal numerous advanced green technologies. The challenge of inadvertently REEs during addressed by proposed innovative method. It relies on cogging interactions and power density with REEs. process uses an algorithm introduced work to sort two steps (a)...

A new family of hexanuclear ferric-lanthanide [Fe(III)(4)Ln(III)(2)(Htea)(4)(Piv)(6)(N(3))(4)] clusters, where Ln(III) = Er(1) and Lu(2) is reported. Variable temperature solid-state magnetic susceptibility studies 1 2 reveal the presence ferromagnetic (1) or competing anti- exchange interactions (2) between constituent Fe(III) ions.

The synthesis and magnetostructural properties of a new low-dimensional magnetic system based on α-furoate ligands, {[Dy(α-C4H3OCOO)(μ-(α-C4H3OCOO))2(H2O)3]}n, abbreviated {Dy(α-fur)3}n, are reported. X-ray diffraction experiments results evidence the presence two different Dy coordination environment types differing only in position one furoate ligands. crystallographic structure is formed by polymeric chains along c-axis, each composed just type, coupled within bc-plane with same type....

We present the synthesis, structure, magnetic properties, as well Mössbauer and electron paramagnetic resonance studies of a ring-shaped [FeIII4LnIII2(Htea)4(μ-N3)4(N3)3(piv)3] (Ln = Y 1, Gd 2, Tb 3, Dy 4, Ho 5, Er, 6) coordination cluster. The Dy, Tb, analogues show blocking magnetization at low temperatures without applied fields. anisotropy 3d ion exchange interaction between 4f ions in Fe4Ln2 complexes are unambiguously determined by high-field/high-frequency measurements temperature....

A straightforward and environment-friendly process for acid-free leaching of rare-earth elements cobalt, which are critical materials, from waste magnet materials has been developed. The also allows selective magnet-containing electronic wastes, such as end-of-life hard disk drives electric motors. use copper salts eliminates the volatile toxic acids in dissolution separation processes, a more eco-friendly approach to recovering safer work environment. Recovered were shown be suitable...

This work reports a dimethyl ether-driven fractional crystallization process for separating rare earth elements and transition metals. The has been successfully applied in the treatment of element-bearing permanent magnet leachates as an atom-efficient, reagent-free separation method. Using ~5 bar pressure, solvent was dissolved into aqueous system to displace contained metal salts solid precipitates. Treatments at distinct temperatures ranging from 20-31 °C enable either lanthanide-rich or...

Check out the magnetism: The antiferromagnetic interactions in Fe7 core (see picture, left) a {Fe7Dy4} complex were confirmed by variable-field 57Fe Mössbauer spectroscopy (picture, right).

A new class of task-specific ionic liquids (ILs) which contain septuply positively charged {Fe(3)(III)O(RCOO)(6)L(3)}(7+) triangles has been synthesized and structurally characterized. Such metal-containing ILs can be repeatedly used as alternative catalysts in the synthesis 2-pyrrolo-3'-yloxindole or condensation indoles with various aldehydes.

In the recently established field of 3d/4f coordination cluster (CC) chemistry several burning questions still need to be addressed. It is clear that combining 3d and 4f metal ions within a core has potential lead electronic structures will very difficult describe but can also extremely interesting. Furthermore, understanding why certain topologies seem favored predict. Here we show secondary sphere provided by ligands influences product, as demonstrated for compound...

A simple, eco-friendly and efficient chemical separation of rare earth oxalates (CSEREOX) in water within two metals subgroups has been elaborated.

In this paper we report a comparative study of different procedures for the inter-matrix synthesis (IMS) monometallic Pd-Polymer-Stabilized Metal NanoParticles (PSMNPs) in sulfonated polyetherether ketone (SPEEK) as stabilizing polymeric matrix. The IMS technique consists consecutive metal loading-reduction cycles and can be realized by using two versions: (i) situ (ii) ex situ. For bare material is first deposited onto electrode surface followed loading reduction. last step (reduction ions...

One of the routes to overcome high instability metal nanoparticles (MNPs) lies in use polymeric materials for their synthesis and stabilization. Besides, one most serious concerns associated with growing production MNPs is possibility uncontrollable escape into medium under treatment environment. A possible solution this problem could be ferromagnetic desired functionality, that might not only prevent by using simple magnetic traps but also allow recovery reuse. In our work we report results...

A {Tb(α-fur)₃}_n one-dimensional complex shows Single-Chain-Magnet (SCM) behavior at <italic>H</italic> = 0 in two different types of antiferromagnetic transverse chains (A and B), triggered by the existence defects breaking into segments with short-range order.

New synthesized polymeric mixed complexes {Tb_xEu_1−x} exhibit both tunable luminescence and SMM behavior.