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Dissertations / Theses on the topic 'Ion multivalent'

Author: Grafiati
Published: 9 November 2024
Last updated: 31 July 2025

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1

Keyzer, Evan. "Development of electrolyte salts for multivalent ion batteries." Thesis, University of Cambridge, 2019. https://www.repository.cam.ac.uk/handle/1810/288431.

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This dissertation focuses on the synthesis and electrochemical testing of new electrolyte salts for rechargeable multivalent ion batteries. In chapters 2 and 3 the synthesis of Mg and Ca hexafluoropnictogenate salts as well as the electrochemical behaviour of Mg(PF6)2 is presented. Pure samples of Mg(EF6)2 (E = P, As, and Sb) can be synthesized using Mg metal and NOPF6/NOSbF6 in CH3CN or via a ammonium salt deprotonation route using Me3NHAsF6 and Bu2Mg. The NOPF6 method was extended to the Ca variant, but isolation of a pure Ca(PF6)2 material required the presence of a crown ether. Electrochem
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2

Li, Na. "Aluminum intercalation behaviours of Molecular Materials." Electronic Thesis or Diss., Sorbonne université, 2024. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2024SORUS222.pdf.

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Le premier chapitre introduit le concept et les caractéristiques fondamentales des matériaux moléculaires. Il met en évidence leurs vastes applications et les avantages qu'ils offrent dans les dispositifs électrochimiques, ainsi qu'un aperçu de leur développement dans ce domaine. Ensuite, les matériaux moléculaires sont classés de trois manières distinctes selon différents critères. Les sous-catégories de chaque classification sont systématiquement expliquées, mettant en lumière différents aspects des matériaux moléculaires selon la méthode de classification.À partir des batteries à ions multi
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3

Wu-Tiu-Yen, Jenny. "Valorisation de la vinasse de canne à sucre : étude d'un procédé d'extraction d'un acide organique multivalent." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLA008.

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La vinasse de distillerie, co-produit de l’industrie canne-sucre-alcool-énergie, contient de 5 à 7 g/L d’un acide d’intérêt, l’acide aconitique, au sein d’un milieu complexe comportant d’autres acides organiques, des acides aminés, mais surtout des sels minéraux (chlorures et sulfates) et des colorants, rendant sa purification complexe. Afin d’améliorer les performances du procédé d’échange d’ions, au coeur de cette purification, la résine anionique faible Lewatit S4528 a été caractérisée. Le dosage de la résine et des mesures d’isothermes d’échange d’ions ont permis de définir : la capacité t
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4

Padigi, Sudhaprasanna Kumar. "Multivalent Rechargeable Batteries." PDXScholar, 2015. https://pdxscholar.library.pdx.edu/open_access_etds/2464.

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Li+ ion batteries have been the mainstay of high energy storage devices that have revolutionized the operating life time of consumer electronic devices for the past two decades. However, there is a steady increase in demand for energy storage devices with the ability to store more energy and deliver them at high power at low cost, without comprising safety and lifetime. Li-ion batteries have had significant challenges in increasing the amount of stored energy without affecting the overall lifetime and the ability to deliver stored energy. In order to store and deliver more energy, more lithium
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5

Mehta, Mary Anne. "Multivalent ions in polymer electrolytes." Thesis, University of St Andrews, 1993. http://hdl.handle.net/10023/15517.

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The electrochemical, thermal and structural properties of polyethylene oxide (PEO) based polymer electrolytes containing multivalent ions were investigated. The phase diagram for the PEO:Ca(CF3SO3)2 system was determined by x-ray diffraction and differential scanning calorimetry techniques. Precipitation of the salt from the system at high temperatures was directly observed by variable temperature x- ray diffraction. This was ascribed to a negative entropy of dissolution of the salt in the polymer. A new crystalline complex PEO6Ca(CF3SO3)2, which exhibits a phase transition between two polymor
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6

Matsarskaia, Olga [Verfasser]. "Multivalent ions for tuning the phase behaviour of protein solutions / Olga Matsarskaia." Tübingen : Universitätsbibliothek Tübingen, 2020. http://d-nb.info/1223451739/34.

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7

Louisfrema, Wilfired. "Caractérisation des oxydes nanoporeux contenant des ions lourds en milieu aqueux." Thesis, Paris Sciences et Lettres (ComUE), 2016. http://www.theses.fr/2016PSLEE055/document.

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Les aluminosilicates poreux cristallins tels que les zéolithes cationiques de type faujasite sont largement étudiés en raison de leurs propriétés d’adsorption, d’échange ionique et de catalyse, ce qui leurs valent d’être engagées dans de nombreuses applications industrielles, qui font intervenir de plus en plus de cations multivalents (détergents/ adoucissants, craquage catalytique, décontamination,...). Ces différentes applications industrielles ont en commun les propriétés d’adsorption, résultant d’une part de la taille de leurs pores du même ordre de grandeur que les espèces introduites, et
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8

Ritt, Marie-Claude. "Thermodynamics of interaction of macrocyclic ligands with multivalent ions and organic molecules of biological importance." Thesis, University of Surrey, 1991. http://epubs.surrey.ac.uk/843105/.

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The first part of this work deals with the determination of the thermodynamic parameters for the complexation of lanthanide cations (La3+, Pr3+ and Nd3+) with Cryptand-221 and Cryptand-222 in acetonitrile and propylene carbonate at 298.15 K. The complexation process between these cations and these ligands in these solvents is enthalpy-controlled. The higher stability observed for these cations and these ligands in propylene carbonate with respect to acetonitrile is attributed to the increase in entropy observed for the complexation reaction in propylene carbonate. Enthalpies of solution of lan
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9

Grawe, Thomas. "Multivalente Rezeptoren auf Phosphonatbasis molekulare Erkennung und Selbstorganisation in Wasser /." [S.l.] : [s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=963938290.

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10

Wolf, Marcell Verfasser], and Frank [Akademischer Betreuer] [Schreiber. "Effective interactions in liquid-liquid phase separated protein solutions induced by multivalent ions / Marcell Wolf ; Betreuer: Frank Schreiber." Tübingen : Universitätsbibliothek Tübingen, 2015. http://d-nb.info/1197057757/34.

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11

Wolf, Marcell [Verfasser], and Frank [Akademischer Betreuer] Schreiber. "Effective interactions in liquid-liquid phase separated protein solutions induced by multivalent ions / Marcell Wolf ; Betreuer: Frank Schreiber." Tübingen : Universitätsbibliothek Tübingen, 2015. http://d-nb.info/1197057757/34.

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12

HEITZ, CAROLINE. "Contribution a l'etude des interactions polyions-ions multivalents : (poly(acide methacrylique) - cuivre, poly(acide acrylique) - chrome)." Université Louis Pasteur (Strasbourg) (1971-2008), 1996. http://www.theses.fr/1996STR13090.

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Nous avons etudie des solutions de poly acide methacrylique (pma) dans l'eau en presence et en absence de cuivre(ii). Dans l'eau pure, le pma presente une transition conformationnelle forme compacte pelote expansee pendant sa neutralisation. L'etude du polymere non ionise dans sa forme compacte par diffusion du rayonnement montre que le polymere est en bon solvant a temperature ambiante. Le facteur de forme indique une structure gaussienne a grande echelle, alors qu'une decroissance en 1/q#3 est observee a grand q. Nos resultats suggerent que la forme compacte est due a l'existence de portions
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13

Thumshirn, Georgette. "Multivalente zyklische RGD-Peptide und RGD-Mimetika für den Einsatz in Tumordiagnostik und Tumortherapie." [S.l.] : [s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=96988950X.

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14

Schmidt, Piet O. "Origins of Effective Charge of Multivalent Ions at a Membrane/Water Interface and Distribution of 2,3,4,5-Tetrachlorophenol in a Membrane Model System." PDXScholar, 1995. https://pdxscholar.library.pdx.edu/open_access_etds/5049.

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Biological cells and subcellular organelles are surrounded by membranes to form compartments performing specialized functions. Adsorption or partitioning of biologically active compounds into the membrane is the first step in the process of modification of cell function. This work is concerned with the problem of distribution of charged molecules between water and electrically charged membrane surface and between water and octanol. Part I of this thesis is focused on the electrostatic interactions taking place between charges on the membrane and ions present in the aqueous region of the membra
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15

Laugel, Nicolas. "Mécanismes de construction de films multicouches de polyélectrolytes : Relations entre les régimes linéaire et exponentiel et la perméabilité aux ions multivalents." Université Louis Pasteur (Strasbourg) (1971-2008), 2007. https://publication-theses.unistra.fr/public/theses_doctorat/2007/LAUGEL_Nicolas_2007.pdf.

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Les films muticouches de polyélectrolytes sont des revêtements organiques d’épaisseur allant du nanomètre au micromètre. Ils peuvent être classés en deux catégories aux propriétés distinctes, selon le régime de croissance de leur épaisseur : linéaire ou exponentiel. L’objectif essentiel de cette thèse a été d’approfondir la compréhension des interactions à l’origine de la formation de ces films et de leur structure interne. Le premier volet a permis d’établir une relation entre le régime de croissance des films formés à partir d’un couple de polyélectrolytes donné et l’enthalpie de la réaction
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16

Laugel, Nicolas Ball Vincent Schaaf Pierre. "Mécanismes de construction de films multicouches de polyélectrolytes relations entre les régimes linéaire et exponentiel et la perméabilité aux ions multivalents /." Strasbourg : Université Louis Pasteur, 2008. http://eprints-scd-ulp.u-strasbg.fr:8080/906/01/LAUGEL_Nicolas_2007.pdf.

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17

Johnson, Rebecca. "The clash of articulations : aesthetic shock, multivalent narratives and Islam in the post-9/11 era." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/the-clash-of-articulations-aesthetic-shock-multivalent-narratives-and-islam-in-the-post911-era(4b88517c-6052-4d4d-90a6-4df8134f1138).html.

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This study investigates a multilingual, multi-genre data set of 13 post-9/11 popular culture videos, produced by performative artists from across global society, which use digital media aesthetics to defy hegemonic narratives relating to Islam and the War on Terror. The languages represented across the 13 texts are English, French, Spanish and Arabic; and the popular culture genres are hip-hop, comedy, punk and parkour. The texts are grouped thematically for analytical purposes into the following categories: 9/11, War on Terror, Clash of Civilisations, and Palestine. Using the sociological man
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18

Shao, Yuan-Fu, and 邵元輔. "DNA Condensation with Multivalent ions and Electrical Manipulation in Nanostructures." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/79308527742706078507.

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碩士<br>國立臺灣大學<br>物理研究所<br>97<br>This thesis is focus on the studying of DNA behaviors in nanoconfinement. In nano/micro fluidic systems, the surface to volume ratio becomes too large to neglect the electrokinetics on the surface. And in nanoconfinement, DNA is forced to be confined to a limit region. This changes the conformation and transport mechanism of DNA and generates lots of novel phenomena. We studied two separate parts: DNA condensation induced by multivalent ions and DNA transport induced by electric field in nanostructures. DNA condensation is a well-known phenomenon. The free-coil-c
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19

Hughes, Sean. "A theoretical investigation of the microsolvation of multivalent ions in clusters." Thesis, 2006. http://spectrum.library.concordia.ca/9086/1/NR23831.pdf.

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Trivalent lanthanide metals (Ln 3+ ) are among the most spectroscopically active ions in the periodic table and are characterized by their exceptional ability to absorb and emit light in the ultraviolet, visible and near infra-red regions of the electromagnetic spectrum. These ions are sensitive to the nature of their ligands, as has been evidenced from their spectral properties in different environments. In an effort to predict the behaviour of lanthanide ions in different environments, solvated Ln 3+ ions in clusters, Ln 3+ (solvent) n , were investigated as a model system. Cluster studies p
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