Academic literature on the topic 'Coordination polymer'

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Dissertations / Theses on the topic "Coordination polymer"

1

Yanai, Nobuhiro. "Controlling Polymer Properties in Coordination Nanospaces." 京都大学 (Kyoto University), 2011. http://hdl.handle.net/2433/142187.

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2

Hall, Andrew J. "Transition metal ion coordination in hydrophilic polymer membranes." Thesis, Aston University, 1994. http://publications.aston.ac.uk/9746/.

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The research described within this thesis is concerned with the investigation of transition metal ion complexation within hydrophilic copolymer membranes. The membranes are copolymers of 4-methyl-4'-vinyl-2,2'-bipyridine, the 2-hydroxyethyl ester of 4,4'- dicarboxy-2,2'-bipyridine & bis-(5-vinylsalicylidene)ethylenediamine with 2-hydroxyethyl methacrylate. The effect of the polymer matrix on the formation and properties of transition metal iron complexes has been studied, specifically Cr(III) & Fe(II) salts for the bipyridyl- based copolymer membranes and Co(II), Ni(II) & Cu(II) salts for the salenH2- based copolymer membranes. The concomitant effect of complex formation on the properties of the polymer matrix have also been studied, e.g. on mechanical strength. A detailed body of work into the kinetics and thermodynamics for the formation of Cu(II) complexes in the salenH2- based copolymer membranes has been performed. The rate of complex formation is found to be very slow while the value of K for the equilibrium of complex formation is found to be unexpectedly small and shows a slight anion dependence. These phenomena are explained in terms of the effects of the heterogeneous phase provided by the polymer matrix. The transport of Cr(III) ions across uncomplexed and Cr(III)-pre-complexed bipyridyl-based membranes has been studied. In both cases, no Cr(III) coordination occurs within the time-scale of an experiment. Pre-complexation of the membrane does not lead to a change in the rate of permeation of Cr(III) ions. The transport of Co(II), Ni(II) & Cu(II) ions across salenH2- based membranes shows that there is no detectable lag-time in transport of the ions, despite independent evidence that complex formation within the membranes does occur.
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3

Yoneda, Ko. "Studies on Magnetic Properties in Porous Coordination Polymer." 京都大学 (Kyoto University), 2009. http://hdl.handle.net/2433/85399.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(工学)<br>甲第14947号<br>工博第3174号<br>新制||工||1476(附属図書館)<br>27385<br>UT51-2009-M861<br>京都大学大学院工学研究科合成・生物化学専攻<br>(主査)教授 北川 進, 教授 榊 茂好, 教授 松田 建児<br>学位規則第4条第1項該当
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4

Kaneko, Wakako. "Studies on multi-functionalization of coordination polymer magnets." 京都大学 (Kyoto University), 2008. http://hdl.handle.net/2433/136283.

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5

Phillips, Rachel Huxford. "Nanoscale coordination polymers for anticancer drug delivery." Thesis, The University of North Carolina at Chapel Hill, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3562787.

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<p> This dissertation reports the synthesis and characterization of nanoscale coordination polymers (NCPs) for anticancer drug delivery. Nanoparticles have been explored in order to address the limitations of small molecule chemotherapeutics. NCPs have been investigated as drug delivery vehicles as they can exhibit the same beneficial properties as the bulk metal-organic frameworks as well as interesting characteristics that are unique to nanomaterials. </p><p> Gd-MTX (MTX = methotrexate) NCPs with a MTX loading of 71.6 wt% were synthesized and stabilized by encapsulation within a lipid bilayer containing anisamide (AA), a small molecule that targets sigma receptors which are overexpressed in many cancer tissues. Functionalization with AA allows for targeted delivery and controlled release to cancer cells, as shown by enhanced efficacy against leukemia cells. The NCPs were doped with Ru(bpy)<sub>3</sub><sup>2+</sup> (bpy = 2,2'-bipyridine), and this formulation was utilized as an optical imaging agent by confocal microscopy. </p><p> NCPs containing the chemotherapeutic pemetrexed (PMX) were synthesized using different binding metals. Zr-based materials could not be stabilized by encapsulation with a lipid bilayer, and Gd-based materials showed that PMX had degraded during synthesis. However, Hf-based NCPs containing 19.7 wt% PMX were stabilized by a lipid coating and showed in vitro efficacy against non-small cell lung cancer (NSCLC) cell lines. Enhanced efficacy was observed for formulations containing AA. </p><p> Additionally, NCP formulations containing the cisplatin prodrug disuccinatocisplatin were prepared; one of these formulations could be stabilized by encapsulation within a lipid layer. Coating with a lipid layer doped with AA rendered this formulation an active targeting agent. The resulting formulation proved more potent than free cisplatin in NSCLC cell lines. Improved NCP uptake was demonstrated by confocal microscopy and competitive binding assays. </p><p> Finally, a Pt(IV) oxaliplatin prodrug was synthesized and incorporated in different NCPs using various binding metals. A moderate drug loading of 44.9 wt% was determined for Zr-based NCPs. This drug loading, along with a diameter less than 200 nm, make these particles promising candidates for further stabilization via lipid encapsulation.</p>
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6

Tas, Huseyin. "Coordination Polymerization Of Cyclic Ethers By Metal Xanthates And Carbamates." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/1225028/index.pdf.

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Zinc xanthates are active catalysts in stereoregular polymerization of propylene oxide and markedly more stable than that of known classical stereoregular catalysts. But steric control of zinc xanthates is weaker. To find more effective catalyst systems the isopropyl xanthates of Cu, Pb, Ni, Fe, Al and Sn are investigated and only copper (Cu(isoPr)Xt) and tin (Sn(isoPr)Xt) isopropyl xanthates were appeared to be active, but Cu(isoPr)Xt yielded only low molecular weight product. Therefore Sn(isoPr)Xt system was investigated in detail in polymerization of propylene oxide (PO). Polymerization of PO with this catalyst produced two contrasting polymers<br>high molar mass, crystalline (K-polymer) and low molar mass (D-polymer). Formation of double bonds in D-polymer was thought to be due to as an anionic process. Polymerization reactions were studied by changing polymerization conditions and reacting catalyst with predetermined amount of water. It&amp<br>#8217<br>s found that Sn(isoPr)Xt have considerably low efficiency than that of Zn(isoPr)Xt catalyst. The yield linearly increases by increasing catalyst concentration. The propagation is competed by termination or transfer process hence overall activation energy is negative. Some mechanistic features of this system was also discussed. The catalytical activity of carbamates in this field has also been reported, without any information about catalytical efficiency and stereoregularity of the process. Therefore zinc diethyl dithiocarbamate was also studied and found as an active catalyst in stereoregular polymerization but it showed weaker efficiency in the PO polymerization than that of Zn(isoPr)Xt catalyst (about 12 times weaker).
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7

Suárez, García Salvio. "Colloidal coordination polymer nanostructures: novel thermochromic and bioimaging probes." Doctoral thesis, Universitat Autònoma de Barcelona, 2019. http://hdl.handle.net/10803/669764.

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Los polímeros de coordinación y su diseño racional permiten la formación de materiales nanoestructurados con una amplia variedad de propiedades. Las múltiples combinaciones entre iones metálicos y ligandos orgánicos como precursores de materiales autoensamblados, han fascinado a los científicos durante décadas. La aplicación de la química de coordinación a nanoescala se considera uno de los enfoques más versátiles para el desarrollo de nuevos materiales nanoestructurados debido a las infinitas posibilidades para alcanzar propiedades sin precedentes. Además, el desarrollo de sistemas metal-orgánicos ha despertado en una gran cantidad de ejemplos para su uso en una amplia gama de aplicaciones. En esta Tesis hemos estado particularmente interesados ​​en el ajuste controlado de las propiedades de los materiales nanoestructurados basados ​​en polímeros de coordinación que se obtuvieron a través de diferentes rutas sintéticas. El método de síntesis, la selección adecuada de precursores y el estudio de las propiedades finales han centrado el trabajo realizado. Además, la formación de suspensiones coloidales estables en agua se estableció como un requisito principal para su potencial aplicación. Para eso, fue necesaria una sinergia multidisciplinaria con el objetivo de buscar la aplicación final de los nuevos materiales nanoestructurados desarrollados. El logro de este objetivo fue posible gracias a un diseño adecuado de la estrategia seguida junto con la caracterización completa de las nanoestructuras preparadas. En una primera parte de esta Tesis, la nanoestructuración de sistemas conmutables basados ​​en Fe(II) con comportamiento de entrecruzamiento de espín (SCO por sus siglas en inglés) se logró siguiendo dos estrategias diferentes. Por un lado, se aplicó una metodología descendente (top-down) basada en la exfoliación en fase líquida para el aislamiento de láminas 2D de cristales multilaminares. Por otro lado, a través de un enfoque ascendente (bottom-up), la síntesis de nuevas nanopartículas fue posible modulando la difusión de la reacción utilizando metodologías basadas en microfluidica. En ambos casos, los materiales nanoestructurados se integraron en matrices poliméricas para evaluar su aplicación potencial como películas termocrómicas para su prueba de concepto. En la segunda parte de la Tesis, se estableció una nueva familia de polímeros de coordinación a nanoescala (NCP por sus siglas en inglés) basados ​​en Fe(III), Gd(III), Mn(II), In(III) y Cu(II) a través de su síntesis racional usando una reacción en un sola etapa. Las nanopartículas obtenidas se validaron mediante pruebas preclínicas in vivo que muestran un rendimiento interesante como posibles agentes teranósticos para la obtención de imágenes (resonancia magnética, tomografía por emisión de positrones y tomografía computarizada por emisión de fotón único) y pretratamiento potencial de glioblastoma y enfermedades pulmonares.<br>Coordination polymers and its rational design let the formation of nanostructured materials with a broad variety of properties. The multiple combinations between metal ions and organic ligands as precursors of self-assembled materials have fascinated scientists for decades. The application of coordination chemistry at the nanoscale is considered one of the most versatile approaches for the development of new nanostructured materials due to the infinite possibilities for reaching unprecedented properties. Furthermore, the development of metal-organic systems has aroused in a plethora of examples for their use in a wide range of applications. In this Thesis we have been particularly interested in the fine tune of the properties of nanostructured materials based on coordination polymers whose were obtained through different synthetic routes. The method of synthesis, the properly selection of precursors and the study of the final properties has centred the work carried out. Additionally, the formation of water-stable colloidal suspensions was stablished as a main requirement for their potential application. For that, a multidisciplinary synergy was necessary with the aim to pursue the final application of the novel nanostructured materials developed. Achieving this objective was possible thanks to a properly design of the strategy followed together with complete characterization of the nanostructures prepared. In a first part of this Thesis, the nanostructuration of Fe(II)-based switchable systems with spin crossover behaviour was achieved by following two different strategies. On the one hand, a top-down methodology based on liquid-phase exfoliation was applied for the isolation of 2D flakes from the bulk crystal. On the other hand, through a bottom-up approach, the synthesis of novel nanoparticles was possible by modulating the reaction diffusion using microfluidic based methodologies. In both cases, the nanostructured materials were integrated in polymeric matrices to evaluate their potential application as proof-of-concept thermochromic films. In the second part of the Thesis, a novel family of nanoscale coordination polymers (NCPs) based on Fe(III), Gd(III), Mn(II), In(III) and Cu(II) was stablished through its rational synthesis by using one-pot reaction. The nanoparticles obtained were validated by pre-clinical in vivo tests showing interesting performance as potential theranostic agents for imaging (Magnetic resonance imaging, positron emission tomography and single-photon emission computed tomography) and potential pre-treatment of glioblastoma and lung diseases.
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8

Tabata, Yasuhiko. "Drug targeting through polymer conjugation based on metal coordination." 京都大学 (Kyoto University), 2003. http://hdl.handle.net/2433/148611.

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9

Perrier, Marine. "Elaboration de nanoparticules magnétiques à base de polymères de coordination cyano-ponté pour l'imagerie médicale." Thesis, Montpellier 2, 2013. http://www.theses.fr/2013MON20262/document.

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Les travaux entrepris au cours de cette thèse ont eu pour objectif d'élaborer de nouvelles nanoparticules magnétiques pour l'imagerie médicale. Ce manuscrit abordera la méthode de synthèse des nanoparticules, leurs caractérisations puis leur évaluation comme agent de contraste pour l'imagerie par résonance magnétique (IRM) et radio-traceur pour la scintigraphie.Dans un premier temps, nous proposerons une méthode de synthèse pour obtenir des nanoparticules magnétiques à base de polymères de coordination cyano-pontés élaborées à partir de précurseurs moléculaires de métaux de transitions et de lanthanides en utilisant des ligands cyanure pontant et stabilisées par des ligands solubles dans l'eau et biocompatibles. Nous présenterons la synthèse, les caractérisations structurales et texturales et les propriétés magnétiques de ces nano-objets de formule générale My[M'(CN)6]z @stabilisant avec M = Fe, Gd, Tb, Y, Ni, Cu ; M' = Fe, Co et stabilisant = PEGNH2, PEG400, Glu-TEG, D-Mannitol, NADG. Nous évaluerons ensuite leur potentielle pour des applications en imagerie médicale. Pour ce faire, nous discuterons de leur capacité à se comporter comme agent de contraste pour l'IRM et comme radio-traceur pour la scintigraphie ou plus précisément la tomographie par émission mono-photonique. Nous développerons une discussion sur les paramètres fondamentaux qui doivent être optimisés afin d'obtenir des nano-objets comme agents de contraste pour l'IRM et dans le but de comprendre le mécanisme de relaxivité de ces nano-objets. Enfin, nous testerons ces agents de contraste et radio-traceurs in vitro et in vivo sur le petit animal. Puis, nous évaluerons la cytotoxicité, la cinétique et les voies d'élimination, la biodistribution, la génotoxicité et la carcinogénèse des nanoparticules utilisées<br>The goal of the present research is to elaborate new magnetic nanoparticles for medical imaging. This manuscript will describe the nanoparticles' synthesis method, their characterization and their evaluation as contrast agent for magnetic resonance imaging (MRI) and functional probe for scintigraphy.In a first time, we will propose synthesis processes allowing to obtain cyano-bridged coordination polymer based magnetic nanoparticles elaborated from transition metals or lanthanides molecular precursors using cyano-bridged ligands and stabilizing ligands soluble in water and biocompatible. We will introduce the synthesis, structural and textural characterizations and magnetic properties of these nano-objects with general formula My[M'(CN)6]z @stabilizer with M = Fe, Gd, Tb, Y, Ni, Cu ; M' = Fe, Co and stabilizer = PEG NH2, PEG400, Glu-TEG, D-Mannitol, NADG.In a second time, we will evaluate their potential as nanoprobles for application in medical imaging. For that, we will discuss about their capacity to act as a contrast agent for MRI and as a functional probe for scintigraphy or more specifically single photon emission computed tomography (SPECT). We will develop discussion about fundamental parameters which must be optimized to obtain contrast agent nano-objects for MRI and to understand nano-object relaxivity mechanisms. Then, we will test these contrast agents and functional probes in vitro and in vivo on mice. Also, we will evaluate the cytotoxicity, the kinetics and way of elimination, the biodistribution, the genotoxicity and the carcinogenesis of the used nanoparticles
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10

Gao, Teng Gao. "Controllable Methylation of Polyethyleneimine by Cu Coordination for NOX, SO2, and CO2 Capture." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1522428169157346.

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