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Establishing a Molecular Basis for R...

Cole, Bren E.

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Establishing a Molecular Basis for Rare Earth Separations: Progress Towards Rare Earth Recycling Through Coordination and Redox Chemistry.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Establishing a Molecular Basis for Rare Earth Separations: Progress Towards Rare Earth Recycling Through Coordination and Redox Chemistry./
作者:	Cole, Bren E.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2019,
面頁冊數:	248 p.
附註:	Source: Dissertations Abstracts International, Volume: 81-04, Section: B.
Contained By:	Dissertations Abstracts International81-04B.
標題:	Chemistry. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=13901003
ISBN:	9781088337035

Establishing a Molecular Basis for Rare Earth Separations: Progress Towards Rare Earth Recycling Through Coordination and Redox Chemistry.
Cole, Bren E.

Establishing a Molecular Basis for Rare Earth Separations: Progress Towards Rare Earth Recycling Through Coordination and Redox Chemistry. - Ann Arbor : ProQuest Dissertations & Theses, 2019 - 248 p.

Source: Dissertations Abstracts International, Volume: 81-04, Section: B.

Thesis (Ph.D.)--University of Pennsylvania, 2019.

This item is not available from ProQuest Dissertations & Theses.

The rare earth elements (La-Lu, Sc and Y) are used in a variety of modern technologies due to their unique optical and magnetic properties. However, extraction and purification of individual rare earth elements is a challenging process that requires significant amounts of energy and generates large quantities of waste. This work focuses on the development of simple, single-step rare earth separation procedures that depend upon a tripodal nitroxide ligand framework. Optimization of solvent conditions for these separations was conducted for targeted rare earth combinations, demonstrating the tunability of the separation procedures. Derivatization of the tripodal ligand framework demonstrated that changing the electronic properties of the rare earth complexes led to modification of their underlying properties, allowing for efficient separations in greener alternative solvents. Preparation of a tris(nitroxide) tripodal, radical proligand was confirmed by magnetometry and electron paramagnetic resonance studies. Reaction of the isolated tri-radical species with different rare earth complexes revealed significantly different reaction rates that allowed for the development of a chelation-driven kinetic separation process for rare earth elements.

ISBN: 9781088337035Subjects--Topical Terms:

516420
Chemistry.
Subjects--Index Terms:

Coordination chemistry

Establishing a Molecular Basis for Rare Earth Separations: Progress Towards Rare Earth Recycling Through Coordination and Redox Chemistry.
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500 $a Source: Dissertations Abstracts International, Volume: 81-04, Section: B.
500 $a Advisor: Schelter, Eric J.;Tomson, Neil C.
502 $a Thesis (Ph.D.)--University of Pennsylvania, 2019.
506 $a This item is not available from ProQuest Dissertations & Theses.
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520 $a The rare earth elements (La-Lu, Sc and Y) are used in a variety of modern technologies due to their unique optical and magnetic properties. However, extraction and purification of individual rare earth elements is a challenging process that requires significant amounts of energy and generates large quantities of waste. This work focuses on the development of simple, single-step rare earth separation procedures that depend upon a tripodal nitroxide ligand framework. Optimization of solvent conditions for these separations was conducted for targeted rare earth combinations, demonstrating the tunability of the separation procedures. Derivatization of the tripodal ligand framework demonstrated that changing the electronic properties of the rare earth complexes led to modification of their underlying properties, allowing for efficient separations in greener alternative solvents. Preparation of a tris(nitroxide) tripodal, radical proligand was confirmed by magnetometry and electron paramagnetic resonance studies. Reaction of the isolated tri-radical species with different rare earth complexes revealed significantly different reaction rates that allowed for the development of a chelation-driven kinetic separation process for rare earth elements.
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653 $a Coordination chemistry
653 $a Lanthanides
653 $a Rare earths
653 $a Recycling
653 $a Separations
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