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Dissertations / Theses on the topic 'Solid-state nuclear magnetic resonance spectroscopy'

Author: Grafiati

Published: 4 June 2021

Last updated: 10 February 2022

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1

Borisov, Alexey S., and University of Lethbridge Faculty of Arts and Science. "Solid-state nuclear magnetic resonance spectroscopy of phosphazene polymers." Thesis, Lethbridge, Alta. : University of Lethbridge, Dept. of Chemistry and Biochemistry, c2009, 2009. http://hdl.handle.net/10133/1305.

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High-resolution one-dimensional 1H, 19F, 31P and 13C MAS NMR experiments were used in a morphological study of solvent-cast and heat-treated poly[bis(trifluoroethoxy)phosphazene] (PBFP). Deconvolution analyses performed on all Nuclear Magnetic Resonance (NMR) spectra are presented. These results suggest the presence of broad and narrow overlapping components at ambient temperature, which were assigned to the crystalline, amorphous and the mesophase regions within the polymer, respectively. The number of signals in the spectra was independently verified using 1H, 19F and 13C Discriminati

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2

Stourton, E. C. "Anisotropic interactions in solid-state nuclear magnetic resonance spectroscopy." Thesis, University of Cambridge, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243269.

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3

Campbell, Susan Christina. "Pharmaceutical polymorphism : an investigation using solid-state nuclear magnetic resonance spectroscopy." Thesis, Durham University, 1998. http://etheses.dur.ac.uk/5021/.

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The study of two pharmaceutically active systems that each display polymorphism has provided a platform upon which to develop and apply solid-state NMR techniques in order to increase the understanding of the solid-state structure of small organic molecules. The multidisciplinary approach adopted has highlighted the advantages of solid-state NMR as a non-invasive probe of molecular conformation and crystallographic packing.Carbon-13 CP/MAS spectra of the two polymorphs of BRL55834 - a fluorinated benzopyran derivative - immediately suggest the presence of one and three molecules in the asymmet

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4

Bennett, Andrew E. (Andrew Ernest). "Dipolar recoupling and decoupling in solid state nuclear magnetic resonance spectroscopy." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/37016.

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5

Itin, Boris. "Structure and dynamics studies by solid-state nuclear magnetic resonance spectroscopy." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/8051.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 2002.<br>Vita.<br>Includes bibliographical references.<br>The major goal of this work is the development of high resolution solid state 205T1 NMR techniques and their application to the elucidation of the mechanism and dynamics of ion exchange in biological solids. The thesis starts with a review of recent progress in solid state NMR spectroscopy. The importance of directly observing ions in biological systems is discussed, and the advantages of 205T1 spectroscopy are noted of. Theoretical framework of the NMR experime

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6

Maus, Douglas C. (Douglas Charles). "Molecular and spin dynamics in solid state nuclear magnetic resonance spectroscopy." Thesis, Massachusetts Institute of Technology, 1996.

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Thesis: Ph. D., Massachusetts Institute of Technology, Dept. of Chemistry, 1996<br>Cataloged from PDF of thesis. Microfiche contains the reproduction of the print thesis.<br>Includes bibliographical references (page 152).<br>Nuclear Magnetic Resonance (NMR) spectroscopic data often involve spatial and spin dynamics and interference phenomena between the two. Experimental results are presented which demonstrate several of these phenomena and exploitation of these anomalies to acquire and improve knowledge regarding relevant chemistry. In some cases numerical analysis of such data are illustrate

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7

Nagapudi, Karthik. "Solid-state NMR investigation of structure and dynamics of polyrotaxanes." Thesis, Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/8638.

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8

Miller, Paul Arthur. "Characterizing internal DNA dynamics using solution and solid state nuclear magnetic resonance spectroscopy /." Thesis, Connect to this title online; UW restricted, 2007. http://hdl.handle.net/1773/8677.

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9

Ironside, Matthew Stuart. "Accurate measurement of chemical shift anisotropy in solid-state nuclear magnetic resonance spectroscopy." Thesis, University of Cambridge, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.608484.

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10

Groves, Ronald William. "O17 spin-lattice relaxation solid state NMR studies of pure and doped ices." Columbus, Ohio : Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1021903674.

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Thesis (Ph. D.)--Ohio State University, 2002.<br>Title from first page of PDF file. Document formatted into pages; contains xx, 128 p.; also contains graphics. Includes abstract and vita. Co-advisors: Charles H. Pennington and James V. Coe, Dept. of Chemistry. Includes bibliographical references (p. 124-128).

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11

Colaux, Henri. "Investigating sensitivity improvement methods for quadrupolar nuclei in solid-state nuclear magnetic resonance." Thesis, University of St Andrews, 2016. http://hdl.handle.net/10023/9628.

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The study of quadrupolar nuclei using NMR spectroscopy in the solid state significantly increased in popularity from the end of the 20th century, with the introduction of specific methods to acquire spectra free from the effects of the quadrupolar interaction, that results in broadened lineshapes that cannot be completely removed by spinning the sample at the magic angle (MAS), unlike most of the other interactions present in the solid state. The first technique which allows, without any specific hardware, the removal of this broadening has been the Multiple-Quantum MQMAS experiment. The metho

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12

Grainger, David S. "The application of the maximum entropy method to one- and two-dimensional nuclear magnetic resonance spectroscopy." Thesis, University of Oxford, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.291092.

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13

Pooransingh-Margolis, Neela. "Vanadium-51 solid-state magic angle spinning NMR spectroscopy of vanadium haloperixodases and oxovanadium (V) haloperoxidase mimics." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file 2.19 Mb., 157 p, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:3200531.

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14

Montina, Anthony D., and University of Lethbridge Faculty of Arts and Science. "Multiple-pulse techniques for solid-state nuclear magnetic resonance spectroscopy of materials / Anthony D. Montina." Thesis, Lethbridge, Alta. : University of Lethbridge, Dept. of Chemistry and Biochemistry, c2010, 2010. http://hdl.handle.net/10133/2614.

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Solid state NMR has the ability to obtain detailed structural information at the molecular level in materials. This has led to the development of a large number of high resolution techniques, some of which utilize multiple pulse methods. The behaviour of these multiple pulse techniques has, to date, been explained using either relaxation or spin dynamics. Ultimately, an explanation based on a combination of both dynamics is required in order to properly understand the underlying mechanism of these techniques. This work presents an explanation of the experimental behaviour observed for three mu

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15

Nasreddine, Victor Fuad. "Solid state nuclear magnetic resonance spectroscopy of polymer thin films : chain conformation, dynamics, and morphology." Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=83081.

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This dissertation presents solid-state NMR studies of the chain conformation, dynamics and morphology of three adsorbed polymer systems: two random semi-crystalline copolymers, poly(ethylene-co-acrylic acid) (PEA) and poly(propylene-co-acrylic acid) (PPA), and an amorphous homopolymer, poly(n-butyl methacrylate) (PnBMA). Zirconia (ZrO2) was chosen as the substrate for all three polymers since the binding of carboxylic acids to this metal oxide is well understood. The choice of polymers was based on their particular bulk conformational and dynamic properties as well as their common use i

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16

Nadaud, Philippe S. "High-Resolution Structural Studies of Paramagnetic Proteins by Multidimensional Solid-State Nuclear Magnetic Resonance Spectroscopy." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1268318234.

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17

Wang, Hao. "Mechanistic studies of electrochemical double layer capacitors using solid-state NMR spectroscopy." Thesis, University of Cambridge, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708302.

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18

Lu, Jun-xia. "Solid-state NMR studies of phospholipid model membranes and membrane-associated macromolecules." Oxford, Ohio : Miami University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=miami1184090235.

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19

Xu, Wei. "Studies of molecular dynamics of FMOC Amino Acids using solid state deuteron nuclear magnetic resonance spectroscopy." W&M ScholarWorks, 2015. https://scholarworks.wm.edu/etd/1563899059.

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The purpose of devising and validating models for intramolecular motions for FMOC amino acids is to quantify side chain motion in proteins which plays an important role in understanding biological structure function relations of proteins. In this thesis, spin lattice relaxation times (Ti) of FMOC amino acids were m easured under both static and magic angle spinning (MAS) condition at variable tem peratures. Lower activation energies of the relaxation times than the normal amino acids observed indicate a less sterically crowded environment for the rotation methyl group. A three-site jump model

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20

Marulanda, Dabeiba. "Structural studies of reassembled and intact thioredoxin by high-resolution solid-state NMR magic angle spinning spectroscopy." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file 13.72 Mb., 213 p, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:3205438.

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21

Huang, Wenlin. "Structural studies of polyoxoanionic solids by vanadium-51 and phosphorus-31 solid state magic angle spinning NMR spectroscopy." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 302 p, 2007. http://proquest.umi.com/pqdweb?did=1354134041&sid=15&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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22

Lisic, Edward C. "Nuclear magnetic resonance studies of dynamic cobalt and rhodium clusters in solution and in the solid state." Diss., Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/49823.

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23

Huster, Daniel. "Solid-state NMR spectroscopy to study protein-lipid interactions." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-190961.

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The appropriate lipid environment is crucial for the proper function of membrane proteins. There is a tremendous variety of lipid molecules in the membrane and so far it is often unclear which component of the lipid matrix is essential for the function of a respective protein. Lipid molecules and proteins mutually influence each other; parameters such as acyl chain order, membrane thickness, membrane elasticity, permeability, lipid-domain and annulus formation are strongly modulated by proteins. More recent data also indicates that the influence of proteins goes beyond a single annulus of next

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24

Carnevale, Diego. "Nuclear magnetic resonance spectroscopy and computational methods for the characterization of materials in solution and the solid state." Thesis, University of St Andrews, 2010. http://hdl.handle.net/10023/1349.

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Nuclear Magnetic Resonance (NMR) and computational methods increasingly play a predominant and indispensable role in modern chemical research. The insights into the local nuclear environment that NMR can provide is unique information which allows the structural characterization of novel materials, as well as the understanding and explanation of their relevant properties on an atomic scale. Computational methods, on the other hand, can be used to support experimental findings, providing a rigorous theoretical basis. Furthermore, when more complex chemical systems are considered, calculations ca

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25

Chen, Lingling. "Through-bond correlation methods for assigning protein resonances with solid-state NMR spectroscopy." Diss., [Riverside, Calif.] : University of California, Riverside, 2008. http://proquest.umi.com/pqdweb?index=1&did=1663077841&SrchMode=2&sid=1&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1268248965&clientId=48051.

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Thesis (Ph. D.)--University of California, Riverside, 2008.<br>Includes abstract. Available via ProQuest Digital Dissertations. Title from first page of PDF file (viewed March 10, 2010). Includes bibliographical references. Also issued in print.

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26

Keates, Julian Mark. "Multinuclear solution and solid state nuclear magnetic resonance spectroscopic studies of selected organometallic compounds." Thesis, University of Sussex, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390081.

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27

Spratt, Michael Phillip. "Solution and solid state NMR studies of fluorine tagging reagents." Diss., Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/49865.

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A series of studies are presented in which fluorine tagging reagents are used to analyze complex mixtures for compounds containing active hydrogen functional groups (e.g., hydroxyl, amine, thiol, and carboxylic groups). The existence of these derivatized functional groups is determined by utilizing a number of solution and solid-state nuclear magnetic resonance (NMR) techniques. In solution NMR studies p-fluorobenzoyl chloride was the fluorine tagging reagent of choice because of a large ¹⁹F chemical shift range for the different derivatized substrates (~10 ppm) and generally good reaction y

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28

Drew, Daniel L. Jr. "Investigating the Structure and Dynamic Properties of Bacteriophage S21 Pinholin Using Solid-State Nuclear Magnetic Resonance and Electron Paramagnetic Resonance Spectroscopy." Miami University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=miami1610187893016095.

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29

Raghunathan, Vinodhkumar. "Elucidation of molecular recognition mechanisms of a peptide involved in biomineralization using solid state nuclear magnetic resonance spectroscopy /." Thesis, Connect to this title online; UW restricted, 2006. http://hdl.handle.net/1773/8644.

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30

Hatcher, Mary Elana. "A solid-state deuterium NMR investigation of the local dynamics of nucleotides in the EcoRI restriction endonuclease binding site /." Thesis, Connect to this title online; UW restricted, 1996. http://hdl.handle.net/1773/8640.

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31

McAlduff, Michael. "Solid-state NMR studies of polymer adsorption onto metal oxide surfaces." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=115692.

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This dissertation presents solid-state NMR studies that probe the dynamic and conformational properties of polymers adsorbed on solid surfaces in the dry state. The systems studied include a series of ethylene based random copolymers where the binding group is modified, and two diblock copolymer systems where the blocks have different intrinsic mobilities and surface interactions. The thesis begins by looking at the structures formed by the adsorption of poly (ethylene-co-acrylic acid) (PEA), poly (ethylene- co-vinyl alcohol) (EVOH), poly (ethylene-co-vinyl acetate) (EVA), and polyethylene (PE

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32

Huster, Daniel. "Solid-state NMR spectroscopy to study protein-lipid interactions." Universität Leipzig, 2014. https://ul.qucosa.de/id/qucosa%3A14047.

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The appropriate lipid environment is crucial for the proper function of membrane proteins. There is a tremendous variety of lipid molecules in the membrane and so far it is often unclear which component of the lipid matrix is essential for the function of a respective protein. Lipid molecules and proteins mutually influence each other; parameters such as acyl chain order, membrane thickness, membrane elasticity, permeability, lipid-domain and annulus formation are strongly modulated by proteins. More recent data also indicates that the influence of proteins goes beyond a single annulus of next

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33

Kiihne, S. R. "Development and application of multidimensional dipolar recoupling methods for distance measurement in nucleic acids /." Thesis, Connect to this title online; UW restricted, 1998. http://hdl.handle.net/1773/8680.

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34

Gu, Juan. "Nuclear magnetic resonance and dynamic polarization studies of liquid/liquid and liquid/solid interfaces." Diss., This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-09232008-144712/.

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35

Xia, Yongjie. "Conformation of Y145Stop Prion Protein in Solution and Amyloid Fibrils Probed by Nuclear Magnetic Resonance Spectroscopy." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1493901910397545.

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36

Dumez, Jean-Nicolas. "Many body dynamics in nuclear spin diffusion." Phd thesis, Ecole normale supérieure de lyon - ENS LYON, 2011. http://tel.archives-ouvertes.fr/tel-00657067.

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Since its introduction by Bloembergen in 1949, nuclear spin diffusion has been a topic of significant interest in magnetic resonance. Spin diffusion, which can be defined as the transfer of spin polarisation induced by the dipolar interaction, is a ubiquitous transport mechanism in solids. Experimental observations of spin diffusion contain structural information. However, the many-body nature of the problem makes it difficult to describe from first principles. The central goal of this thesis is to obtain a quantitative description of the spin diffusion phenomenon from first-principles, throug

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37

Zagdoun, Alexandre. "Dynamic Nuclear Polarisation Surface Enhanced NMR Spectroscopy." Phd thesis, Ecole normale supérieure de lyon - ENS LYON, 2014. http://tel.archives-ouvertes.fr/tel-01065554.

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Since its discovery in the 1950's, DNP has been a topic of significant interest in magnetic resonance. DNP is the transfer of polarization between single electrons and nuclei, driven by micro-wave irradiation. Since its renaissance at high field in the 90's, due to the introduction of gyrotrons as high-power, high-frequency microwave sources most application of this technique have been samples of biological interest in frozen solution. The long standing interest of our group in the characterization of surface species such as supported catalysts on silica lead us to apply this technique to the

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38

Chaudhary, Praveen, and University of Lethbridge Faculty of Arts and Science. "Lewis-acid and fluoride-ion donor properties of SF₄ and solid-state NMR spectroscopy of Me₃SnF." Thesis, Lethbridge, Alta. : University of Lethbridge, Dept. of Chemistry and Biochemistry, c2011, 2011. http://hdl.handle.net/10133/2621.

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Trimethyltin fluoride (Me3SnF) is a useful fluorinating agent in organometallic chemistry. Its solid-state structure has been investigated by X-ray crystallography showing a polymeric fluorine-bridged structure. Disorder, however, has precluded the accurate refinement of all structural parameters. In order to obtain accurate structural information, trimethyltin fluoride was investigated using high-resolution 13C, 19F, and 119Sn solid-state NMR spectroscopy using a four-channel HFXY capability. The 119Sn{1H} solid-state NMR spectrum agrees with pentacoordination about Sn in this compound. The h

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39

Lay-Fortenbery, Ashley. "INVESTIGATION OF FACTORS INFLUENCING PROTEIN STABILITY IN LYOPHILIZED FORMULATIONS USING SOLID-STATE NMR SPECTROSCOPY." UKnowledge, 2019. https://uknowledge.uky.edu/pharmacy_etds/105.

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Many proteins are unstable in solution and must be formulated in the solid state. This has led to an increase in the use of lyophilized dosage forms. Lyophilization is a complicated processing method consisting of three major steps: freezing, primary drying, and secondary drying. This can lead to several formulation stability challenges including changes in ionization within the matrix, phase separation of the protein drug from added stabilizers, sufficient mobility within the system for movement of reactive species and protein side chains, and crystallization of excipients upon storage. Solid

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40

Schoelzel, Daniel [Verfasser], та Gunnar [Gutachter] Schröder. "Structural characterization of recombinant and pathogenic Amyloidβ(1-42)-Peptide by solid-state Nuclear Magnetic Resonance Spectroscopy / Daniel Schoelzel ; Gutachter: Gunnar Schröder". Düsseldorf : Universitäts- und Landesbibliothek der Heinrich-Heine-Universität Düsseldorf, 2020. http://d-nb.info/1211813908/34.

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41

Sneddon, Scott. "Characterisation of inorganic materials using solid-state NMR spectroscopy." Thesis, University of St Andrews, 2016. http://hdl.handle.net/10023/8239.

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This thesis uses solid-state nuclear magnetic resonance (NMR) spectroscopy and density functional theory (DFT) calculations to study local structure and disorder in inorganic materials. Initial work concerns microporous aluminophosphate frameworks, where the importance of semi-empirical dispersion correction (SEDC) schemes in structural optimisation using DFT is evaluated. These schemes provide structures in better agreement with experimental diffraction measurements, but very similar NMR parameters are obtained for any structures where the atomic coordinates are optimised, owing to the simila

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42

Weirich, Franziska [Verfasser], Henrike [Gutachter] Heise, and Manuel [Gutachter] Etzkorn. "Structural characterization of recombinant fibrillar human Islet Amyloid Polypeptide by solid-state Nuclear Magnetic Resonance Spectroscopy / Franziska Weirich ; Gutachter: Henrike Heise, Manuel Etzkorn." Düsseldorf : Universitäts- und Landesbibliothek der Heinrich-Heine-Universität Düsseldorf, 2017. http://d-nb.info/1137699930/34.

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43

Xu, Mingcan [Verfasser]. "Preparation of mesoporous MCM-41 materials with enhanced Brønsted acidity and their characterization by multi-nuclear solid-state magnetic resonance spectroscopy / Mingcan Xu." Aachen : Shaker, 2003. http://d-nb.info/1181602327/34.

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44

George, Laurel. "Applications of solid-state 15N NMR spectroscopy to the study of nitrogen cycling in sub-tropical forest plantations." View thesis, 2008. http://handle.uws.edu.au:8081/1959.7/39262.

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Thesis (Ph.D.) -- University of Western Sydney, 2008.<br>A thesis submitted to the University of Western Sydney, College of Health and Science, School of Natural Sciences, in fulfilment of the requirements for the degree of Doctor of Philosophy. Includes bibliographical references.

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45

Lee, Gregory Mitchell. "Solution-state conformational studies of endothelin analogs /." Thesis, Connect to this title online; UW restricted, 1999. http://hdl.handle.net/1773/11619.

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46

Rankin, Andrew Gordon McLaughlin. "Applications of multinuclear solid-state NMR spectroscopy to the characterisation of industrial catalysts." Thesis, University of St Andrews, 2018. http://hdl.handle.net/10023/12793.

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This thesis describes applications of advanced multinuclear solid-state nuclear magnetic resonance (NMR) experiments to the characterisation of industrially-relevant catalyst materials. Experiments on γ-Al₂O₃ introduce the use of solid-state NMR spectroscopy for the investigation of disordered solids. The existence of Al(V) sites on the surface of this material is demonstrated, showing that removal of adsorbed H₂O may facilitate a rearrangement effect in γ-Al₂O₃ that promotes the formation of these Al environments. A range of aluminium oxide-based supported metal catalysts has been investigate

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47

Griffin, Joanna Louise. "Investigations of the metal fluoride transition state and ground state analogue complexes of HAD superfamily proteins by nuclear magnetic resonance spectroscopy." Thesis, University of Sheffield, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.574570.

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Metal fluorides (MgF3-, AIF4 - and BeF3-) have been used to mimic the transition state and ground state of phosphate transfer enzymes. The aim of this thesis is to study how phosphate transfer enzymes are able to achieve rate enhancements of 1021 over the uncatalysed reaction, using the full complement of metal fluoride analogues. NMR and X-ray crystallography have been used synchronically to extend the current knowledge of phosphate transfer in β-phosphoglucomutase (βPGM) and phosphoserine phosphatase (PSP). The charge balance theory proposes that the active site of phosphate transfer enzymes

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48

Mello, Nilson Camargo. "Caracterização de zeolitas utilizando espectroscopia de alta resolução em sólidos por ressonância magnética nuclear." Universidade de São Paulo, 1993. http://www.teses.usp.br/teses/disponiveis/54/54132/tde-22112013-111448/.

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O objetivo deste trabalho consistiu na caracterização das zeólitas Y e ZSM-5, usando a técnica de Espectroscopia de Alta resolução em sólidos por Ressonância Magnética Nuclear (RMN). Os espectros de alta resolução do 13C e 27Al foram obtidos usando, simultaneamente, as técnicas de desacoplamento em alta potência (DEC) e rotação da amostra em torno de ângulo mágico (MAS). Utilizamos os espectros de alta resolução dos núcleos de 27Al para analisarmos a coordenação e a quantificação dos alumínios estruturais e extra-estruturais em zeólitas Y e de 13C para analisarmos o posicionamento de moléculas

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49

Sarpal, Kanika. "PHASE BEHAVIOR OF AMORPHOUS SOLID DISPERSIONS: MISCIBILITY AND MOLECULAR INTERACTIONS." UKnowledge, 2019. https://uknowledge.uky.edu/pharmacy_etds/98.

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Over the past few decades, amorphous solid dispersions (ASDs) have been of great interest to pharmaceutical scientists to address bioavailability issues associated with poorly water-soluble drugs. ASDs consist of an active pharmaceutical ingredient (API) that is typically dispersed in an inert polymeric matrix. Despite promising advantages, a major concern that has resulted in limited marketed formulations is the physical instability of these complex formulations. Physical instability is often manifested as phase heterogeneity, where the drug and carrier migrate and generate distinct phases, w

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50

Bignami, Giulia Paola Maria. "Exploiting isotopic enrichment for a solid-state NMR investigation of 'ADORable' zeolites and breathing metal-organic frameworks." Thesis, University of St Andrews, 2018. http://hdl.handle.net/10023/14202.

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This thesis combines synthetic studies for isotopic enrichment with solid-state characterisation techniques to investigate two classes of microporous materials: zeolites and metal-organic frameworks (MOFs). These materials have a wide range of successful applications, from industrial catalysis to medicine, resulting in the increasing need for both a complete understanding of their unique structural features and synthetic methods to target new frameworks. Nuclear magnetic resonance (NMR) spectroscopy, thanks to its sensitivity to the local, atomic-scale, environment and its element specificity,

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