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Rare earths: jewels for functional materials of the future
Eliseeva, Svetlana V.,Bü,nzli, Jean-Claude G. Royal Society of Chemistry 2011 New journal of chemistry Vol.35 No.6
<P>In recent decades, rare earths have become vital to a wealth of advanced materials and technologies including catalysts, alloys, magnets, optics and lasers, rechargeable hydride batteries, electronics, economical lighting, wind- and solar-energy conversion, bio-analyses and imaging. In this perspective article we give a broad overview of rare earth resources and uses first and then of selected applications in dedicated fields such as telecommunications, lasers, photovoltaics (solar-energy conversion), lighting (fluorescent lamps and OLEDs), luminescent probes for bio-analyses and bio-imaging, as well as magnetism and magnetic refrigeration.</P> <P>Graphic Abstract</P><P>Rare-earth resources and uses are presented and selected applications in telecommunications, lasers, solar-energy conversion, lighting, bioanalyses, bioimaging, single-molecule magnets, and magnetic refrigeration are discussed. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c0nj00969e'> </P>
Lanthanide luminescence for functional materials and bio-sciences
Eliseeva, Svetlana V.,Bü,nzli, Jean-Claude G. Royal Society of Chemistry 2010 Chemical Society reviews Vol.39 No.1
<P>Recent startling interest for lanthanide luminescence is stimulated by the continuously expanding need for luminescent materials meeting the stringent requirements of telecommunication, lighting, electroluminescent devices, (bio-)analytical sensors and bio-imaging set-ups. This <I>critical review</I> describes the latest developments in (i) the sensitization of near-infrared luminescence, (ii) “soft” luminescent materials (liquid crystals, ionic liquids, ionogels), (iii) electroluminescent materials for organic light emitting diodes, with emphasis on white light generation, and (iv) applications in luminescent bio-sensing and bio-imaging based on time-resolved detection and multiphoton excitation (500 references).</P> <P>Graphic Abstract</P><P>Lighting, telecommunications, electroluminescent devices, (bio-)analytical sensors, live cell bio-imaging, all rely on lanthanide luminescence which illuminates our daily life. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=b905604c'> </P>
Kamenskii, Mikhail A.,Eliseeva, Svetlana N.,Volkov, Alexey I.,Kondratiev, Veniamin V. The Korean Electrochemical Society 2022 Journal of electrochemical science and technology Vol.13 No.2
Electrochemical properties of LiMn<sub>2</sub>O<sub>4</sub> cathode were investigated in three types of Zn-containing electrolytes: lithium-zinc sulfate electrolyte (1M ZnSO<sub>4</sub> / 2M Li<sub>2</sub>SO<sub>4</sub>), zinc sulfate electrolyte (2MZnSO<sub>4</sub>) and lithium-zinc-manganese sulfate electrolyte (1MZnSO<sub>4</sub> / 2MLi<sub>2</sub>SO<sub>4</sub> / 0.1MMnSO<sub>4</sub>). Cyclic voltammetry measurements demonstrated that LiMn<sub>2</sub>O<sub>4</sub> is electrochemically inactive in pure ZnSO<sub>4</sub> electrolyte after initial oxidation. The effect of manganese (II) additive in the zinc-manganese sulfate electrolyte on the electrochemical performance was analyzed. The initial capacity of LiMn<sub>2</sub>O<sub>4</sub> is higher in presence of MnSO<sub>4</sub> (140 mAh g<sup>-1</sup> in 1 M ZnSO<sub>4</sub> / 2 M Li<sub>2</sub>SO<sub>4</sub> / 0.1 M MnSO<sub>4</sub> and 120 mAh g<sup>-1</sup> in 1 M ZnSO<sub>4</sub> / 2MLi<sub>2</sub>SO<sub>4</sub>). The capacity increase can be explained by the electrodeposition of MnO<sub>x</sub> layer on the electrode surface. Structural characterization of postmortem electrodes with use of XRD and EDX analysis confirmed that partially formed in pure ZnSO<sub>4</sub> electrolyte Zn-containing phase leads to fast capacity fading which is probably related to blocked electroactive sites.
Bunzli, J.C.G.,Chauvin, A.S.,Kim, H.K.,Deiters, E.,Eliseeva, S.V. Elsevier Publishing Company 2010 Coordination Chemistry Reviews Vol. No.
The photophysical parameters for the sensitization of metal-centred luminescence are analyzed in two series of complexes with tridentate and hexadentate ligands having N<SUB>x</SUB>O<SUB>y</SUB> chelating units. In particular, the radiative lifetime τ<SUB>rad</SUB> is experimentally estimated for 29 nine-coordinate Eu<SUP>III</SUP> complexes and 10 eight- and nine-coordinate Yb<SUP>III</SUP> complexes. The known dependence of τ<SUB>rad</SUB> on refractive index is substantiated by comparing data for solid-state samples and solutions. Moreover, a clear dependence of τ<SUB>rad</SUB> with the coordination environment is evidenced and in the case of Eu<SUP>III</SUP>, a comparison between τ<SUB>rad</SUB> and the nephelauxetic effect generated by the ligands is attempted. Altogether, this extensive analysis points to the importance of having a handle on τ<SUB>rad</SUB> when designing ligands for highly luminescent lanthanide-containing molecular edifices. This, in turn, should stimulate initiating theoretical considerations to unravel a reliable relationship between τ<SUB>rad</SUB> and the electronic structure of the ligands.