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Dissertations / Theses on the topic 'Oligomers'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Sun, Xiaohua. "Synthesis and properties of monodisperse oligomer-substituted calix[4]arene assemblies and related oligomers." HKBU Institutional Repository, 2006. http://repository.hkbu.edu.hk/etd_ra/706.

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2

Cerf, Emilie. "Unraveling Alzheimer's disease: insight into the influence of apolipoprotein E isoforms on Abeta aggregation." Doctoral thesis, Universite Libre de Bruxelles, 2011. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209880.

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Nowadays, the emerging role of amyloid-β peptide (Aβ) oligomers in Alzheimer’s disease (AD) is widely accepted, putting aside the old idea that fibrils are the primary entities responsible for the onset of the disease. Recent studies indeed show that the level of soluble Aβ oligomeric forms better correlates with the progression of the disease than the level of fibrillar forms. <p>Using conditions which yield characteristic Aβ42 oligomers or fibrils, we studied the secondary structure of these species by ATR (attenuated total reflection)-FTIR (Fourier transform infrared) spectroscopy. Whereas

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3

Lederer, Kay. "Crystalline assemblies of folded oligomers." [S.l. : s.n.], 1999. http://ArchiMeD.uni-mainz.de/pub/2000/0036/diss.pdf.

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4

Anderson, Sally. "Templated synthesis of porphyrin oligomers." Thesis, University of Cambridge, 1993. https://www.repository.cam.ac.uk/handle/1810/251546.

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5

Forrest, Martin J. "Characterisation of vinyl chloride oligomers." Thesis, Loughborough University, 1988. https://dspace.lboro.ac.uk/2134/27931.

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A low molecular weight fraction was obtained from a mass polymerised PVC resin by using diethyl ether Soxhlet extraction followed by either preparative gel filtration or solvent fractionation. A gas chromatography - mass spectroscopy (GC-MS) analysis of this fraction revealed that, in addition to vinyl chloride (VC) oligomers, it contained a large number of other compounds, in particular a large concentration of phthalates. By using adsorption liquid chromatography it was possible to remove the phthalates, along with other contaminants having a similar or greater polarity, from the low molecul

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6

Szczypiński, Filip Tomasz. "Ester-based synthetic information oligomers." Thesis, University of Cambridge, 2019. https://www.repository.cam.ac.uk/handle/1810/289396.

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7

Wahl, Markus C. "Crystal Structures of RNA Oligomers /." The Ohio State University, 1996. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487933245536475.

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8

Doss, Raymond Michael Stoltz Brian M. Dervan Peter B. "Programmable oligomers for DNA recognition /." Diss., Pasadena, Calif. : California Institute of Technology, 2006. http://resolver.caltech.edu/CaltechETD:etd-09202008-110622.

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9

Stross, Alexander. "Synthetic H-bonding information oligomers." Thesis, University of Sheffield, 2016. http://etheses.whiterose.ac.uk/12365/.

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The nucleic acids contain chemical information in the form of a sequence of bases. This information content is expressed through sequence selective duplex formation and template directed synthesis. To date, the only programmable artificial information molecules that can truly rival the nucleic acids, in terms of their function, are structurally very similar to the nucleic acids. This thesis describes a synthetic approach to duplex forming hydrogen bonding oligomers that contain information in the form of a sequence of H-bond donor and acceptor groups, in the pursuit of a programmable material

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10

Deloule, Vivien. "Study on extraction and characterization of softwoods hemicelluloses oligomers and their influence on gut microbiota." Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAI107.

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11

Haid, Stefan [Verfasser]. "Functionalized selenophene oligomers and co-oligomers and their application in organic solar cells / Stefan Haid." Ulm : Universität Ulm. Fakultät für Naturwissenschaften, 2012. http://d-nb.info/1028055110/34.

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12

Fecchio, Chiara. "Alfa-synuclein oligomers induced by docosahexaenoic acid: a study of activity and molecular characterization." Doctoral thesis, Università degli studi di Padova, 2014. http://hdl.handle.net/11577/3423765.

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Parkinson disease (PD) is the main neurodegenerative disease that involves motor symptoms. About 1% of population above 65 years is affected by PD. Main symptoms are bradikinesia, resting tremor, postural instability, muscle rigidity, and sometimes, cognitive problems and personality. Neuropathological features of PD are neuronal death in the substantia nigra pars compacta and formation of cytoplasmatic inclusion, named Lewy bodies, constituted by fibrillar form of α-synuclein (aS). aS is a 140 amino acid protein, whose structure and function is yet not well defined. As a consequence of specif

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13

Price, David. "Characterisation of oligomers of vinyl polymers." Thesis, Loughborough University, 1996. https://dspace.lboro.ac.uk/2134/26866.

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Large scale Soxhlet extraction and fractional precipitation have been utilised to provide low molecular weight extracts from poly(vinyl chloride) (PVC), polystyrene and polyethylene. These extracts were then resolved into their constituent oligomers by high performance gel permeation chromatography and high performance liquid chromatography.

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14

Huang, Da Wei. "Purification and characterization of HP1 oligomers." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape10/PQDD_0006/MQ44185.pdf.

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15

Conroy, M. "Synthesis of #alpha#, #omega# functionalised oligomers." Thesis, Lancaster University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240508.

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16

Bewsher, Alan. "New crosslinking methods for functionalised oligomers." Thesis, Lancaster University, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335350.

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17

Li, Junhui. "Studies of hydroxybutyrate oligomers crystalllization behaviour." Thesis, Open University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.417487.

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18

Webb, Simon John. "Mixed metalloporphyrin oligomers as oxidation catalysts." Thesis, University of Cambridge, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.627427.

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19

Swain, Jonathan. "Phenylacetylene oligomers as synthetic information molecules." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/279084.

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Nucleic acids store genetic information in the sequence of nucleobases. Through duplex formation and template directed synthesis, the information stored in nucleic acids determines their three-dimensional structure and function. Nucleic acids are essential molecules for biological processes and have been used in nanotechnology. Modified nucleic acids have been synthesised that still form duplexes and can be tolerated by enzymes, suggesting that it is possible to construct a synthetic system comparable to nucleic acids, orthogonal to nucleic acids. This thesis describes the synthesis of a new c

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20

Macdonell, Andrew. "Hybrid polyoxometalates : aromatics, asymmetrics and oligomers." Thesis, University of Glasgow, 2015. http://theses.gla.ac.uk/6386/.

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This thesis looks at the synthesis of hybrid polyoxometalates (POMs), a family of polyoxometalate compounds grafted to organic moieties. Focussing particularly on the Mn-Anderson hybrid, it looks at new ways of isolating and purifying them and at how the organic component can be used to alter their crystal structure or to link multiple Mn-Anderson cores together to form short oligomer chains. In the first section, two Mn-Anderson hybrids are prepared with large aromatic organic moieties, as a continuation of earlier work looking at how aromatic organic components can influence the structure of

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21

Cremers, Jonathan. "Electronic communication in heterometallated porphyrin oligomers." Thesis, University of Oxford, 2017. http://ora.ox.ac.uk/objects/uuid:2a9d43e5-1700-4f74-be65-288fdcca1357.

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This thesis presents the synthesis and characterisation of a range of heterometallated porphyrin oligomers and other novel 3D π-conjugated porphyrin nanostructures. Subsequently, their physical organic properties were evaluated which revealed some fascinating electronic properties. Chapter 1 summarises some of the work done in the Anderson group on porphyrin nanostructures and reviews the literature regarding heterometallated porphyrin oligomers. In addition it introduces the main concepts and techniques used in the remainder of the thesis. In Chapter 2 the stabilities of a family of four line

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22

Schneider, Stephen Edward. "Guanidinium linked oligomers : design, synthesis, and applications /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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23

Al-Aeeb, Ahmed. "The synthesis of 1-butene oligomers with vinyl endgroups and their use in further reactions." Thesis, Link to the online version, 2007. http://hdl.handle.net/10019/379.

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24

Mohammed, Nor Hussin Bin. "Telechelic natural rubber oligomers via controlled ozonolysis." Thesis, Lancaster University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.306916.

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25

Förtsch, Sebastian [Verfasser]. "Dithienopyrroles: monomers, oligomers, and polymers / Sebastian Förtsch." Ulm : Universität Ulm, 2018. http://d-nb.info/1173249710/34.

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26

Hania, Majid I. M. "Studies on polyester networks and their oligomers." Thesis, Queen's University Belfast, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.388094.

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27

Zhu, Zhixue. "Cyclic oligomers in macromolecular and supramolecular chemistry." Thesis, University of Reading, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.272293.

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28

Crase, Jason L. "Synthesis and Characterization of Ortho-Phenylene Oligomers." Miami University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=miami1282931679.

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29

Yang, Wenwen. "Synthesis of N-alkyl urea peptoid oligomers." University of Cincinnati / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1378197097.

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30

Mathew, Sanyo. "Folding of ortho-phenylene oligomers." Miami University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=miami1406553741.

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31

Woodward, Alison Francesca. "Laccase-catalysed depolymerisation of lignin model oligomers." Thesis, University of Nottingham, 2017. http://eprints.nottingham.ac.uk/42457/.

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Laccase-catalysed depolymerisation of lignin offers substantial opportunities to form bio-derived aromatic chemicals. Laccase works with exquisite selectivity to oxidise the 5-5’ and β-5’ linkages in lignin and to cleave the β-O-4’ linkages in the presence of 1-hydroxybenzotriazole (1-HBT). However, the laccase/1-HBT system is inefficient when applied to industrial lignin, and the complexity of the product mixtures hinders rapid optimisation. Therefore, I studied laccase-catalysed oxidation of three synthetic lignin model oligomers, which had well-defined structures, yielded analytically tract

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32

Tomsett, Michael. "Signal transduction in helical oligomers and polymers." Thesis, University of Bristol, 2017. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.742998.

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33

Mitrpant, Chalermchai. "Pre-mRNA splicing manipulation via Antisense Oligomers." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2009. https://ro.ecu.edu.au/theses/421.

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Duchenne muscular dystrophy (DMD), the most common lethal neuromuscular disease in childhood, arises from protein-truncating mutations in the dystrophin gene. A deficiency in dystrophin leads to loss of the dystrophin associated protein complex (DAPC), which in turn, renders muscle fibres vulnerable to injury, and eventually leads to muscle loss, necrosis and fibrosis. Although, the dystrophin gene was identified nearly two decades ago, and extensive research has been directed at finding a therapy for DMD, to date, there is still no effective treatment available. One promising molecular approa

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34

Hall, Grace Louise. "A comparison of ultraviolet, thermal, and microwave polymerized acrylamide terminated polydimethylsiloxane." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-12172008-063727/.

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35

Yao, Dandan. "Synthesis of new conjugated meso porphyrin dendrimers and oligomers and study of their optical properties." Thesis, Rennes, INSA, 2015. http://www.theses.fr/2015ISAR0008/document.

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Au cours de cette thèse, nous avons synthétisé et caractérisé de nouveaux composés en utilisant le macrocycle porphyrine en tant que brique moléculaire. L’objectif, après la synthèse, était d’étudier les propriétés photophysiques de ces nouvelles molécules. Plus précisément, nous avons considérés trois groupes de dendrimères fluorènyles-porphyrines et deux oligomères avec des structures conjuguées. Les corrélations structures et propriétés optiques ont été discutées en détail, ainsi que le transfert d’énergie du dendron conjugué donneur. Dans le premier chapitre, nous avons décrit la chimie de

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36

Hao, Yu. "Synthesis and conformational studies of beta 2,3-cyclic aminoxy peptides." Click to view the E-thesis via HKUTO, 2005. http://sunzi.lib.hku.hk/hkuto/record/B36363236.

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37

Clarke, Tracey Michelle, and n/a. "An investigation of polaron, bipolaron and exciton structures in oligothiophenes : a resonance raman and theoretical study." University of Otago. Department of Chemistry, 2007. http://adt.otago.ac.nz./public/adt-NZDU20070420.150451.

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This thesis presents a spectroscopic and computational study of a variety of substituted oligothiophenes. The purpose of this study was to elucidate the structural properties of their neutral, oxidised and excited states. This was accomplished using a number of spectroscopic methods, including electronic absorption, resonance Raman and fluorescence spectroscopy. Analysis of the data provided by these methods was aided by the application of density functional theory (DFT) to the neutral and charged species, allowing conclusions regarding bond length changes and molecular orbitals to be drawn. A

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38

Lim, Christina Go. "Synthesis and characterization of poly(oxazoline) rotaxanes and literature review on separation, detection and identification of cyclic oligomers in poly(ethylene terephthalate) and poly(c̋aprolactam) /." This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-01202010-020257/.

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39

Mayes, Benjamin A. "Towards polyhydroxylated nylon and cyclopeptide-cyclodextrin analogues." Thesis, University of Oxford, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289367.

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40

Lo, Pik Kwan Peggy. "Synthesis and structure-property relationships of novel multi-[pi] conjugated molecular systems." HKBU Institutional Repository, 2006. http://repository.hkbu.edu.hk/etd_ra/704.

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41

Allared, Fredrik. "Synthesis of new building blocks for conjugated oligomers." Doctoral thesis, KTH, Chemistry, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3782.

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<p>This thesis deals with the synthesis of new organicmaterials for electronic applications. Several new ring-formingmethods are employed to construct sulphur heterocycles: Tandemelectrophilic aromatic substitution and acid-catalyzedtransetherification of methoxythiophene, double electrophilicaromatic substitutions with ethane-1, 2-disulphenyl chloride,and also, the reaction of dienes with sulphur dichloride. Twonew condensed thiophenes have been incorporated in end-cappedoligothiophenes. An improvement of the synthesis of [3,2-b:2, 3-d]thiophene is reported, with some attempts toincorporate

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42

Balbo, Block Marco Amaru. "Folding architectures containing phenylene ethynylene oligomers and polymers." [S.l.] : [s.n.], 2006. http://www.diss.fu-berlin.de/2006/437/index.html.

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43

Troiber, Christina. "Sequence-defined polycationic oligomers for nucleic acid delivery." Diss., lmu, 2013. http://nbn-resolving.de/urn:nbn:de:bvb:19-153439.

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44

Haywood, Rachael. "Synthesis of telechelic oligomers for potential new materials." Thesis, Lancaster University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.404263.

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45

Shyam, Radhe. "Cationic amphipathic peptoid oligomers as antimicrobial peptide mimics." Thesis, Université Clermont Auvergne‎ (2017-2020), 2018. http://www.theses.fr/2018CLFAC048/document.

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Les organismes vivants produisent des peptides antimicrobiens (PAMs) pour se protéger contre les microbes. La résistance croissante aux antibiotiques nécessite le développement de nouvelles stratégies thérapeutiques et les PAMs sont des candidats prometteurs pour résoudre ce problème. Ils possèdent une activité à large spectre et leur principal mécanisme d'action par perméation de la membrane engendre peu de phénomènes de résistance. Néanmoins, leur faible biodisponibilité empêche leur utilisation. Certaines limitations peuvent être surmontées en développant des mîmes de PAMs qui conservent le

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46

Hoong, Seng Soi. "Synthesis of oligomers/polymers from plant oil derivatives." Thesis, University of Warwick, 2013. http://wrap.warwick.ac.uk/57716/.

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The work presented in this thesis represents the chemical modifications of unsaturated plant oils to yield oligomeric/polymeric polyols suitable for polyurethane synthesis. Chapter 1 provides the introduction to the chemistry of polyurethanes, plant oils and plant oil based polyols. Chapter 2 focus on making oligomeric polyols from unsaturated plant oils through epoxidation and subsequent epoxide ring opening oligomerization that yielded oligomeric polyols. The properties of these oligomeric polyols were influence by the level of unsaturation of the plant oils. In addition, catalyst loading, m

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47

Andrade, Helena. "DNA Oligomers - From Protein Binding to Probabilistic Modelling." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-218709.

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This dissertation focuses on rationalised DNA design as a tool for the discovery and development of new therapeutic entities, as well as understanding the biological function of DNA beyond the storage of genetic information. The study is comprised of two main areas of study: (i) the use of DNA as a coding unit to illustrate the relationship between code-diversity and dynamics of self-assembly; and (ii) the use of DNA as an active unit that interacts and regulates a target protein. In the study of DNA as a coding unit in code-diversity and dynamics of self-assembly, we developed the DNA-Based

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48

Olugbemiga, Caroline Teniola. "Heterocyclic ladder polymers and oligomers for electronic devices." Thesis, Kingston University, 2003. http://eprints.kingston.ac.uk/20717/.

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In this project it was planned to synthesise and investigate the physical, chemical and electrical properties of the "polyquinoxaline" family of materials. The compounds synthesised and studied included 5,14-dihydro-5, 7,12, 14-tetraazapentacene(L5H[sub]2), dibutyldihydro-5, 7,12, 14-tetraazapentacene (L5Bu[sub]2H[sub]2), 7, 16-dihydro-5, 7,9,14,16,18-hexaazaheptacene(L7H[sub]2), 7,20-dihydro-5, 7, 9, 11, 16, 18, 20, 22-octaazanonacene (L9H[sub]2), dibutyldihydro-5, 7, 9, 11, 16, 18, 20, 22- octaazanonacene (L9Bu[sub]2H[sub]2), "Polyquinoxaline"(poly[ 1, 6-dihydropyrazino(2, 3-g)-quinoxaline-2

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49

Peeks, Martin. "Electronic delocalisation in linear and cyclic porphyrin oligomers." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:58a35932-320c-47dc-828e-0d121d693fd8.

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This thesis presents a combined experimental and computational evaluation of the physical-organic properties of butadiyne-linked porphyrin oligomers. The principal result from the thesis is the synthesis and characterisation of the largest aromatic and antiaromatic systems to date, in the form of an oxidised [6]-porphyrin nanoring, with diameter 2.4 nm. This large electronically coherent system provides insight into the connection between aromatic ring currents and persistent currents in metal and semiconductor mesoscopic rings. Chapter 1 briefly reviews the concepts used in the remainder of t

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50

Tan, Biao. "Synthesis and characterization of phenylethynyl endcapped polyetherimide oligomers." Diss., Virginia Tech, 1997. http://hdl.handle.net/10919/40330.

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