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Dissertations / Theses on the topic 'Luminescence; Rare earth metals'

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Published: 4 June 2021

Last updated: 1 February 2022

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1

Dai, Lixiong. "Structural modifications to optimise lanthanide luminescence." HKBU Institutional Repository, 2017. http://repository.hkbu.edu.hk/etd_oa/403.

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Luminescent lanthanide coordination complexes have attracted significant attention due to their unique optical properties. The poor absorption of a lanthanide ion can be resolved by so-called antenna effect and improve the intensity of its luminescence. Three bidentate chromophores: phosphate-pyridine chromophore, 1,2-Hydroxy pyridone (1,2-HOPO) and 2-thenoyltrifluoroacetone (TTA), functioned as both chelator and sensitizer, their energy levels are well matched with the excited state energy levels of the Eu(III) and Sm(III).. To get highly luminescent and stable lanthanide complex, we designed

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2

Li, Hongguang. "Responsive luminescence toolbox for biological applications." HKBU Institutional Repository, 2016. https://repository.hkbu.edu.hk/etd_oa/275.

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In chapter one, literature review have been down about the photophysical properties of lanthanide complexes and their applications. In chapter 2, the design and synthesis of water soluble cyclen based europium complexes with cyclin A specific peptides were described. Linear and two-photon induced hypersensitive europium emission gave the real time signalling and also enhanced the two-photon induced emission from 12GM to 68GM after Cyclin A binding. In chapter 3, the design of water soluble multi-modal porphyrin based compounds for key cell cycle regulator- Plk 1 imaging and cancer cells inhibi

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3

Sábio, Rafael Miguel [UNESP]. "Luminescent nanohybrids based on silica and d-f heterobimetallic silylated complexes: new tools for biological media analysis." Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/144587.

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Submitted by RAFAEL MIGUEL SÁBIO null (rafaelmsabio@gmail.com) on 2016-11-01T21:14:55Z No. of bitstreams: 1 THESE RAFAEL MIGUEL SABIO 26_10_2016.pdf: 9769437 bytes, checksum: 37a38ed4b54498b696d4fe43ebcdfa2e (MD5)<br>Approved for entry into archive by Felipe Augusto Arakaki (arakaki@reitoria.unesp.br) on 2016-11-10T13:19:03Z (GMT) No. of bitstreams: 1 sabio_rm_dr_araiq_par.pdf: 1635130 bytes, checksum: e5de0aa69e20b9d8d68afedc85cab297 (MD5)<br>Made available in DSpace on 2016-11-10T13:19:03Z (GMT). No. of bitstreams: 1 sabio_rm_dr_araiq_par.pdf: 1635130 bytes, checksum: e5de0aa69e20b9d8d68

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4

Jayasundera, Anil. "Solvothermal chemistry of luminescent lanthanide fluorides." Thesis, University of St Andrews, 2009. http://hdl.handle.net/10023/2125.

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Exploration of novel lanthanide fluoride framework materials in inorganic-organic hybrid systems under solvothermal conditions towards development of new luminescent materials is discussed. X-ray single crystal and powder diffraction methods have been used as crystallographic characterisation techniques. Determination and study of luminescence properties for selected hybrid materials has also been carried out. The first organically templated luminescent lanthanide fluoride framework, [C₂N₂H₁₀]₀.₅ [Ln₂F₇] (Ln= Nd, Tb, Dy, Ho, Er, Yb and Lu), has been synthesised and characterised. This structur

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5

Maqbool, Muhammad. "Growth, Characterization and Luminescence and Optical Properties of Rare-Earth Elements and Transition Metals Doped in Wide Bandgap Nitride Semiconductors." Ohio University / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1127411237.

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6

Shalav, Avi School of Photovoltaic &amp Renewable Energy Engineering UNSW. "Rare-earth doped up-converting phosphors for an enhanced silicon solar cell response." Awarded by:University of New South Wales. School of Photovoltaic and Renewable Energy Engineering, 2006. http://handle.unsw.edu.au/1959.4/24184.

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Photovoltaic solar cells can generate electricity directly from sunlight without emitting harmful greenhouse gases. This makes them ideal candidates as large scale future energy producers for the global energy economy. Ideally, solar cells should be efficient and inexpensive to compete in the global energy market. Unfortunately, a number of fundamental limitations exist for the efficiency due to fundamental loss mechanisms of the semiconductor materials used to make solar cells. One of the dominant loss mechanisms from a conventional silicon solar cell is the transparency of sub-bandgap near-

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7

Arvapally, Ravi K. "Sensitization of Lanthanides and Organic-Based Phosphorescence via Energy Transfer and Heavy-Atom Effects." Thesis, University of North Texas, 2010. https://digital.library.unt.edu/ark:/67531/metadc28388/.

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The major topics discussed are the phosphorescence sensitization in the lanthanides via energy transfer and in the organics by heavy atom effects. The f-f transitions in lanthanides are parity forbidden and have weak molar extinction coefficients. Upon complexation with the ligand, ttrpy (4'-p-Tolyl-[2,2':6',2"]-terpyridine) the absorption takes place through the ligand and the excitation is transferred to the lanthanides, which in turn emit. This process is known as "sensitized luminescence." Bright red emission from europium and bright green emission from terbium complexes were observed. The

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8

Sábio, Rafael Miguel. "Nanohybrides luminescents à base de silice et de complexes hétérobimétalliques d-f silyles." Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30399/document.

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Le design de complexes luminescents hétérobimétalliques a suscité un intérêt croissant ces dernières années en raison de leurs propriétés photophysiques uniques. Dans ces complexes de Nd (III) ou Yb (III) associés à des chromophores du bloc d, la forte émission du métal de transition dans le visible est utilisée pour sensibiliser de façon efficace les niveaux f-f du lanthanide(III) qui émet à son tour dans le visible ou l'IR selon la terre rare. Plus spécifiquement l'attention s'est focalisée sur le développement de complexes hétérobimétalliques d-f pour l'émission dans le proche infrarouge (N

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9

Katayama, Yumiko. "Optical and photo-electric studies on quantum cutting and persistent luminescent phosphors doped with rare-earth and transition-metal ions." Kyoto University, 2014. http://hdl.handle.net/2433/188818.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(人間・環境学)<br>甲第18380号<br>人博第693号<br>新制||人||166(附属図書館)<br>25||人博||693(吉田南総合図書館)<br>31238<br>京都大学大学院人間・環境学研究科相関環境学専攻<br>(主査)教授田部勢津久, 教授加藤立久, 教授杉山雅人, 教授森本芳則, 教授山本行男<br>学位規則第4条第1項該当

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10

Cabral, Filipe Miranda. "Complexos intermetálicos de irídio e európio : sensibilização via banda de transferência de carga metal-ligante /." São José do Rio Preto, 2014. http://hdl.handle.net/11449/111018.

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Orientador: Sergio Antonio Marques de Lima<br>Banca: Ana Maria Pires<br>Banca: Alexandre de Oliveira Legendre<br>Resumo: Íons lantanídeos são utilizados como centros emissores em dispositivos emissores de luz, apresentam alta eficiência de emissão, porém baixa absortividade molar. Este problema pode ser contornado com o uso de ligantes orgânicos com alta absortividade e que transfiram energia de forma eficiente para os íons lantanídeos em complexos. A transferência de energia dos estados singlete e triplete do ligante orgânico para o íon emissor recebe o nome de efeito antena. Os complexos de

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11

Cabral, Filipe Miranda [UNESP]. "Complexos intermetálicos de irídio e európio: sensibilização via banda de transferência de carga metal-ligante." Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/111018.

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Made available in DSpace on 2014-12-02T11:16:50Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-06-27Bitstream added on 2014-12-02T11:21:21Z : No. of bitstreams: 1 000791641_20190704.pdf: 606342 bytes, checksum: b1cce87814fc7ee5f9f42f2bfa752150 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Íons lantanídeos são utilizados como centros emissores em dispositivos emissores de luz, apresentam alta eficiência de emissão, porém baixa absortividade molar. Este problema pode ser contornado com o uso de ligantes orgânicos com alta absortividade e que transfiram

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12

Panov, Nikita. "Microwave-Assisted Solvothermal Synthesis and Optical Characterization of M(RE)F4 (M – Alkali Metal; RE – Rare-Earth Metal) Nano- and Microscale Particles." Thesis, Université d'Ottawa / University of Ottawa, 2020. http://hdl.handle.net/10393/40590.

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Interest in rare-earth-doped crystalline materials, e.g., M(RE)F4 (M – alkali metal, RE – rare-earth metal), featuring unique optical properties such as light upconversion and downshifting is experiencing a surge due to the broad spectrum of applications that these photonic systems are facilitating. The development of reliable synthetic methods that grant rapid access to these materials is therefore of great importance. Microwave-assisted synthesis is appealing in this regard, because microwave radiation enables rapid and uniform heating of the reaction mixture and allows for rigid control of

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13

Nigoghossian, Karina. "Multifunctional platforms based on upconversion nanoparticles for applications in nanomedicine." Araraquara, 2018. http://hdl.handle.net/11449/153466.

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Orientador: Sidney Jose Lima Ribeiro<br>Banca: Younes Messaddeq<br>Banca: Denis Boudreau<br>Banca: Cid Bartolomeu de Araujo<br>Banca: Anna Marie Ritcey<br>Banca: Mauricio da Silva Baptista<br>Banca: Rogéria Rocha Gonçalves<br>Resumo: Na área biomédica, existe uma crescente demanda por nanossistemas multifuncionais para realização de imageamento e terapia simultaneamente, visando um diagnóstico precoce e máximo benefício terapêutico. Nanopartículas para conversão ascendente de energia (UCNPs) vêm sendo propostas como a sonda biológica ideal devido às suas vantagens únicas relacionadas ao fenôme

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14

Muniz, Elaine Cristina. "Metalosupramoléculas discretas e Metal Organic Frameworks (MOFs) baseados em íons lantanídeos: design, síntese, caracterização e propriedades /." Araraquara, 2016. http://hdl.handle.net/11449/136246.

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Orientador: Regina Célia Galvão Frem<br>Co-orientador: Marco Aurélio Cebim<br>Banca: José Clayston Melo Pereira<br>Banca: Rogéria Rocha Gonçalves<br>Banca: José Maurício Almeida Caiut<br>Banca: Sérgio Antonio Marques de Lima<br>Resumo: Materiais luminescentes despertam grande interesse nas pesquisas devido à variedade de aplicações, podendo ser empregados em displays eletrônicos, lâmpadas fluorescentes e diodos emissores de luz, por exemplo. Neste contexto, os íons lantanídeos trivalentes são destaque pois apresentam propriedades luminescentes únicas como alta pureza de cor, tempo de vida de n

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15

Dutra, José Diogo de Lisboa. "LUMPAC : desenvolvimento e aplicação de um pacote computacional para o estudo de estruturas luminescentes a base de Európio." Pós-Graduação em Química, 2014. https://ri.ufs.br/handle/riufs/6109.

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Lanthanide-containing systems have many applications, which extend from the biomedical field to optical images areas. Because of that, such systems have attracted the attention of several research groups around the world. It is indisputable that theoretical tools can provide useful information for the understanding of the phenomena that are not easily explained by using only experimental data. Moreover, the theoretical tools are useful for design new systems. Although several tools for the study of lanthanide complexes have been developed since the early 90 s, their use is still limited on acc

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16

Karali, Turgay. "Luminescence studies of rare earth doped dosimeters." Thesis, University of Sussex, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298733.

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17

Santos, Simei Tarse Sobrinho. "Síntese e caracterização de materiais híbridos siloxano-PMMA dopados com íons Eu(III)." Pós-Graduação em Química, 2014. https://ri.ufs.br/handle/riufs/6058.

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In this work siloxane-polymethyl methacrylate (PMMA) hybrid materials were synthesized and doped with Eu (III) from solid europium chloride, solid europium (III) nitrate, europium chloride (III) in alcoholic solution and 3-aminopyrazine-2-carboxylate of lanthanum and europium complex. The hybrid was prepared from methyl methacrylate (MMA) and 3-methacryloxy-propyl-trimethoxysilane (MPTS), using benzoyl peroxide (BPO) as polymerization initiator. The use of the sol-gel method by acid catalysis allowed to obtain pure solid materials and doped with europium different sources with amorphous charac

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18

Dhesi, Sarnjett Singh. "Surface structure of rare-earth metals." Thesis, University of Liverpool, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333635.

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19

Harika, Rita 1979. "Advances in rare earth chemistry." Monash University, School of Chemistry, 2003. http://arrow.monash.edu.au/hdl/1959.1/5545.

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20

Jehan, David Antony. "Magnetic structures in rare earth metals and superlattices." Thesis, University of Oxford, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.357569.

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21

Xu, Amei. "Luminescence properties of Zinc oxide doped with rare earth ions." Ohio University / OhioLINK, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1174408190.

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22

Matos, Heveson Luís Lima de. "Determinação da estrutura local de sítios do íon Eu3+ com alta simetria em cristais." Pós-Graduação em Física, 2014. https://ri.ufs.br/handle/riufs/5335.

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A study of the local structure of the Eu3+ ion with high symmetry in crystals was carried out using the crystal field theory by the method of nearest neighbours (MENN). The crystals studied were: M2O3, SnO2, BaliF3 and XMgF3 doped with very low concentrations of Eu3+ ion. From equations of the crystal field parameters, the maximum splitting of 7F1 multiplet and the electrostatic equilibrium of luminescent site was possible to predict the interatomic distance Eu-O ions in the luminescent site. For the M2O3 crystal, the overlap between the 4f orbitals and 2p in the range 0.07. Ïj.0.1 and the cha

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23

Blyth, Robert I. R. "Bulk and surface electronic structure of rare earth metals." Thesis, University of Liverpool, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.316767.

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The basic properties of the rare earth metals, including single crystal growth, crystal and magnetic structures, and the relationship between electronic and magnetic structure, are reviewed. The problems encountered by the theoretical treatment of the partially occupied, but highly localised, lanthanide 4f levels as bands are discussed, and bandstructure calculations presented for the hexagonal close-packed rare earths. These are compared with available experimental and theoretical data. It is suggested that the exchange-splitting of the lanthanide valence bands may well persist in the paramag

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24

Hoh, Soon Wen. "Oxidation catalysis using transition metals and rare earth oxides." Thesis, Cardiff University, 2014. http://orca.cf.ac.uk/69756/.

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Oxygen abstraction together with CO adsorption and oxidation over palladium/platinum-doped cerium (IV) oxide and gold catalyst supported on iron (III) oxide were studied employing density functional theory with the inclusion of on-site Coulomb interaction (DFT+U). Hybrid functionals employing DFT method are able to re-produce structural properties for CeO2 that agrees well with experimental data. The localisation of two excess electrons upon the removal of an oxygen atom from the CeO2 lattice is well described by DFT+U and is found to be most favourable on two next nearest neighbour cerium sit

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25

Vikström, Hanna. "Rare Metals: Energy Security and Supply." Thesis, Uppsala universitet, Institutionen för fysik och astronomi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-168130.

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Lithium and neodymium are two critical materials in our modern society, many technological solutions depend on them. Lithium is used in batteries, which are used in cars and portable electronics. Neodymium, which is a rare earth element, is mainly used in permanent magnets which are used in smartphones, hard disc drives and turbines. There are many reports regarding the availability of the metals, with different results. The available data on the reserves varies considerably, from the few sources there are. In this report, based on geological availability, forecasts are done to investigate how

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26

Alshawa, Amer K. "Luminescence properties of rare earth doped III-V and II-VI semiconductors." Ohio : Ohio University, 2000. http://www.ohiolink.edu/etd/view.cgi?ohiou1179167587.

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27

White, D. R. R. "Spectral luminescence studies of rare earth doped CaF2 and some synthetic materials." Thesis, University of Sussex, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.283110.

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28

Ellerby, Mark. "Resistance and magnetization study of rare earth metals and compounds." Thesis, Birkbeck (University of London), 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336406.

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29

Kramer, Mathias. "Cationic alkyl and hydride complexes of the rare earth metals." Aachen Shaker, 2009. http://d-nb.info/998740497/04.

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30

Coetzee, Louis-Charl Cloete. "A study of lanthanide complexes with di-2-pyridyl ligands." Thesis, Nelson Mandela Metropolitan University, 2016. http://hdl.handle.net/10948/4731.

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The ligands di(2-pyridyl) ketone (DPK) and cis-1,2 di(2-pyridyl) ethylene (DPE) are N,N,Odonor ligands that can undergo nucleophilic addition and become more flexible for coordination. The reaction between the lanthanide thiocyanate salt and DPK gave rise to seven novel complexes of the general formula [Ln(NCS)3(DPKOH)3], where Ln = La, Ce, Nd, Eu, Tb, Dy and Ho. 1H NMR spectroscopy verified that the ligand underwent nucleophilic addition upon coordination. This was further confirmed using UV-Vis spectroscopy which showed a shift in the absorption bands due to conjugation of electrons within t

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31

Madanhire, Tatenda. "Synthesis and characterisation of lanthanide complexes with nitrogen- and oxygen-donor ligands." Thesis, Nelson Mandela Metropolitan University, 2016. http://hdl.handle.net/10948/13127.

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The reactions of Ln(NO3)3∙6H2O (Ln = Pr, Nd or Er) with the potentially tridentate O,N,O chelating ligand 2,6-pyridinedimethanol (H2pydm) were investigated, and complexes with the formula, [Ln(H2pydm)2(NO3)2](NO3) (Ln = Pr or Nd) and [Er(H2pydm)3](NO3)3 were isolated. The ten-coordinate Pr(III) and Nd(III) compounds crystallise in the triclinic space group P-1 while the nine-coordinate Er(III) complex crystallises in the monoclinic system (P21/n). The reaction of PrCl3∙6H2O with H2pydm yielded the compound, [Pr(H2pydm)3](Cl)3, that crystallises in the monoclinic system, space group P21/c with

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32

Ardicoglu, Burcu. "Synthesis Of Rare-earth Doped Lithium Triborate." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/3/12606354/index.pdf.

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Research in the field of non-linear optical (NLO) devices lead to an increasing interest in new borate compounds, capable of expanding the frequency range provided by common laser sources. Lithium triborate (LBO) is a newly developed ideal non-linear optical crystal used in laser weapon, welder, radar, tracker, surgery, communication, etc. Borates containing rare-earth elements are of great interest since they are found to be superior in non-linear optical applications. In this study, synthesis and identification of rare-earth doped lithium triborate was carried out. Lithium triborate was pro

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33

Gao, Yuan. "Design of rare-earth-doped inorganic phosphors and luminescence enhancement by plasmonic effects." Kyoto University, 2020. http://hdl.handle.net/2433/253288.

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34

Shah, N. J. "Hyperfine interactions in amorphous and crystalline alloys containing rare earth metals." Thesis, University of Manchester, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377743.

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Webb, Helen Rachael 1975. "Interaction of the rare earth ions with p-sulfonatocalix[4]arene and 18-crown-6." Monash University, Dept. of Chemistry, 2001. http://arrow.monash.edu.au/hdl/1959.1/9076.

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Jin, Geng Bang. "Synthesis and characterization of new Lanthanide chalcogenides." Auburn, Ala., 2007. http://repo.lib.auburn.edu/07M%20Dissertations/JIN_GENGBANG_37.pdf.

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Aggarwal, Jugdeep K. "The mobility of trace elements and boron isotopes in Icelandic hydrothermal systems." Thesis, University of Bristol, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294571.

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Tobash, Paul H. "Synthesis, structure, bonding, and physical properties of novel binary and ternary rare-earth metal germanides." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 514 p, 2009. http://proquest.umi.com/pqdweb?did=1833646491&sid=11&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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39

Bao, Guochen. "The study of photophysical properties of organic-lanthanide hybrid materials and their applications." HKBU Institutional Repository, 2020. https://repository.hkbu.edu.hk/etd_oa/773.

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Designing hybrid materials allows leveraging the properties of different material systems to achieve novel functions. Significant progress has been made in recent years to exploit the physicochemical properties of a new generation of hybrid materials for emerging biomedical applications. In Chapter 1, I review the recent advances in the field of dye-lanthanide hybrid materials, centring on the interface between organic dyes and inorganic lanthanide materials and investigating their photophysical and photochemical properties. Five representative dye-lanthanide hybrid material systems including

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40

Mkwakwi, Kwakhanya. "Synthesis and characterisation of lanthanide complexes with O,O-donor ligands: towards a new generation of hydrophosphonylation catalysts." Thesis, Nelson Mandela Metropolitan University, 2017. http://hdl.handle.net/10948/11986.

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This study investigates the coordination behaviour of potentially bi- and tridentate O,O- and O,N,O-donor Schiff base ligands with trivalent lanthanide ions. The reactions of lanthanide nitrates with 2-((E)-(tert-butylimino)methyl)-6-methoxyphenol (HL1) have yielded five complexes that are described by the general formula [Ln(HL1)2(NO3)3] (Ln = Ce, Nd, Gd, Ho and Er) and were characterised using physico-chemical techniques including single-crystal X-ray diffraction spectroscopy. The cerium complex crystallised in a triclinic (P-1) space group, while the rest of the complexes crystallised in th

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41

Steinberg, Simon [Verfasser]. "Early Rare-Earth Metal Cluster Complexes With Endohedral Transition Metals / Simon Steinberg." München : Verlag Dr. Hut, 2013. http://d-nb.info/1042307504/34.

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42

Krupin, Oleg. "Dichroism and Rashba effect at magnetic crystal surfaces of rare earth metals." [S.l. : s.n.], 2004. http://www.diss.fu-berlin.de/2004/249/index.html.

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43

Robinson, Katie Jane. "Electrochemical studies of rare earth and transition metals in molten NaCl-KCl." Thesis, Imperial College London, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296988.

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44

Zarychta, Bernard. "Theory of resonant x-ray scattering in the heavy rare earth metals." Thesis, Keele University, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.486008.

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The basic structural &magnetic properties of rare earth ions and metals are discussed.A theory of the electronic structure of rare earth ions is introduced using Self Interaction Corrected Relativistic Spin polarised Density FUnctional Theory (SIC-R-SP-DFT). The ~rystal environment is modelled using the Linear Muffin Tin Orbital (LMTO) method. X-ray scattering from a single electron is discussed using covariant perturbation theory and is then elaborated on for the SIC-R-SP-LMTO environment. The details of the xray scattering calcul~tions are considered. Results for x-ray scattering from the he

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45

張志成 and Chi-shing Samuel Cheung. "Ni and rare-earth metals in-diffusion in LiNbO3 for waveguide application." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1998. http://hub.hku.hk/bib/B31215117.

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46

Kramer, Mathias [Verfasser]. "Cationic Alkyl and Hydride Complexes of the Rare-Earth Metals / Mathias Kramer." Aachen : Shaker, 2009. http://d-nb.info/1161300929/34.

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47

Struckmann, Mona [Verfasser]. "Reactions of Rare Earth and transition metals under harsh conditions / Mona Struckmann." Gießen : Universitätsbibliothek, 2018. http://d-nb.info/116957095X/34.

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48

Cheung, Chi-shing Samuel. "Ni and rare-earth metals in-diffusion in LiNbO3 for waveguide application /." Hong Kong : University of Hong Kong, 1998. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19982094.

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49

Lim, Chee Ming. "Automated ultrasound studies of magnetoelastic effects in rare earth metals and alloys." Thesis, University of Warwick, 1998. http://wrap.warwick.ac.uk/91220/.

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Abstract:

Ultrasound studies of single crystals of Er, Tm and alloys of Er-Tm were carried out as a function of temperature (4.2 - 300 K) and applied magnetic field (0 – 5 T). The elastic constants of these materials were measured and anomalies in the elastic constants were observed. The ultrasound data were compared with reported results from other material characterisation techniques and the magnetic phases and transition temperatures of the materials were then identified. The effects of the application of magnetic field on the magnetic ordering of the materials were studied using the ultrasound metho

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50

Johnson, Kevin Ross David. "An investigation of novel reactivity and bonding in rare earth metal complexes." Thesis, Lethbridge, Alta. : University of Lethbridge, Dept. of Chemistry and Biochemistry, c2012, 2012. http://hdl.handle.net/10133/3329.

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Abstract:

The synthesis, structure and reactivity of organolanthanide complexes supported by a family of novel bis(phosphinimine)carbazole and bis(phosphinimine)pyrrole pincer ligands is presented. Through the systematic development of the ligand frameworks, rare earth metal species with unique structure and reactivity were encountered. A variety of complexes that exhibited unusual bonding modes were prepared and characterized by single-crystal X-ray diffraction and multinuclear NMR spectroscopy. Modulation of the ligand frameworks allowed for rational manipulation of the steric and electronic environme

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