Dissertations / Theses on the topic 'Porphyrin'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Porphyrin.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
Luo, Jin-Li. "Porphyrin metabolism in porphyria cutanea tarda." Thesis, Open University, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315308.
Full textGuo, Rong. "Porphyrin metabolism in congenital erythropoietic porphyria." Thesis, Open University, 1992. http://oro.open.ac.uk/57392/.
Full textLefley, Colin Richard. "Raman spectroscopic studies of porphyrins and porphyrin-protein complexes." Thesis, University of York, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239782.
Full textWessendorf, Florian. "Supramolecular fullerene-porphyrin architectures = Supramolekulare Fulleren-Porphyrin-Architekturen." kostenfrei, 2010. http://d-nb.info/1000613593/34.
Full textBeavington, Richard. "Porphyrin arrays." Thesis, University of Oxford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.388909.
Full textPromarak, Vinich. "Porphyrin arrays." Thesis, University of Oxford, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249614.
Full textZhang, Wei. "Porphyrin arrays." Thesis, University of Oxford, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.494395.
Full textTannert, Sebastian. "Energy and electron transfer in porphyrin-phthalocyanin-porphyrin heterotrimers." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2013. http://dx.doi.org/10.18452/16850.
Full textThis thesis contributes to the comprehension of energy and electron transfer within novel supra-molecular structures, denominated triads, consisting of a central phthalocyanine axially-coupled to two porphyrins. In the course of this thesis, two of the trimers, were quantitatively characterized regarding their intramolecular transfer processes. Both feature a dative bond between the porphyrins and the phthalocyanine via the central silicium atom of the latter. These investigations aimed at answering whether this class of compounds allows the desired combination of light harvesting and charge separation. The rate constants of both investigated trimers in two solvents with different polarity were determined by the combination of data from a variety of measurement methods. An efficient charge transfer from the porphyrins to the phthalocyanine and a hole transfer from the phthalocyanine to one of the porphyrins occurs in all investigated cases. This result confirms the prospect that light harvesting and charge separation can occur combined in one molecule. Depending on solvent polarity and the structure of the porphyrines, electron transfer parallel to the energy transfer and a charge back transfer takes place in addition to both above-mentioned processes. However, the charge-separated state of the investigated substances decays to fast, still preventing a practical utilization of these compounds in solar cells and necessitating further developments.
Sek, Sau Yin. "The synthesis of haematoporphyrin derivative III and other novel porphyrins /." Title page, table of contents and abstract only, 1990. http://web4.library.adelaide.edu.au/theses/09PH/09phs4622.pdf.
Full textIakushev, Aleksei A. "Amination catalysée par des sels de palladium ou de cuivre pour la synthèse de polymacrocycliques contenant des fragments aza éthers-couronnes, porphyrines et calix[4]arènes." Thesis, Montpellier, 2016. http://www.theses.fr/2016MONTT221/document.
Full textPolymacrocyclic compounds are of great interest due to their unique coordination properties. The first convenient synthetic approach to various polycyclic compounds containing several azacrown-ether moieties, to cryptands and supercryptands, based on azacrown-ethers, has been developed by Krakowiak and coworkers in the beginning of 1990s using simple nucleophilic substitution reactions. At present time heteropolytopic polymacrocyclic compounds, capable of forming polynuclear complexes with various metals, attract the utmost interest. In the majority of publications dealing with the synthesis of polymacrocyclic compounds non-catalytic approaches were applied, except for several porphyrin dyads and triads, which were obtained using Suzuki, Sonogashira and Heck reactions. The laboratory of organoelement compounds of Chemistry Department of Lomonosov Moscow State University has a great experience of the application of Pd-catalyzed amination reactions for the synthesis of polymacrocyclic compounds, nowadays Cu-catalyzed arylation of di- and polyamines is under investigation. Bearing it in mind we have found the research for Cu-catalyzed amination to be important in synthesis of polymacrocyclic compounds containing di- and polyamine linkers; as well as the synthesis of new types of polytopic polymacrocyclic conjugates, bearing azacrown-ether, porphyrin and calixarene moieties, by means of Pd- and Cu-catalyzed reactions; and studying their properties as metal cations detectors.The aim of the research is to develop catalytic synthetic approaches to polymacrocyclic conjugates, bearing azacrown-ether, porphyrin and calix[4]arene moieties, and to study their abilities as detectors for metal cations. For this purpose it is necessary to carry out the following investigations: 1) to study the regularities of Cu(I)-catalyzed amination of halogen derivatives of azacrown-ethers and porphyrins and to synthesize corresponding amino derivatives; 2) to develop the methods for the catalytic macrocyclization aimed at the synthesis of macrobicyclic and macrotricyclic compounds, containing diazacrown-ether, cyclen, cyclam and calix[4]arene moieties; 3) to introduce fluorophoric fragments (including porphyrins) into macrocyclic and macrobicyclic compounds; 4) to investigate metal cations binding by thus synthesized polymacrocycles using UV and fluorescent spectroscopy, and to find possible fluorescent and colorimetric detectors among them
Abeykoon, Brian. "Conception, synthèse et caractérisations de MOFs à base de porphyrines." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSE1259/document.
Full textPorphyrins are important macrocyclic compounds which are prevalent in nature and have been extensively studied by chemists in homogeneous catalysis as enzyme mimics. Incorporating porphyrins in metal-organic frameworks (MOFs) offer an ideal opportunity to obtain material with extended frameworks possessing the same properties as the homogenous systems. Much work has been done on porphyrinic MOFs but their stability remains a problem and a major limitation for possible wide scale applications. In literature, more stable MOFs have been realised using high valent metal ions in the inorganic building unit (such as Fe3+, Al3+, Zr4+) and/or by using more basic functionalities in the organic linker. However, regarding porphyrinic MOFs, little work is reported with ligands based on functionalities other than carboxylic acid groups. Therefore, our work focused on investigating the reactivity of porphyrinic ligands carrying various functionalities with high valent metal ions. More precisely, we focused on the design, synthesis optimisation and characterisation of such materials. This included studying existing stable carboxylate porphyrinic frameworks with a goal of incorporating new functionalities, which led to new variations of these materials. Our work also demonstrated that the framework topologies observed with carboxylate based porphyrinic ligand can be expanded to other functionalities with the synthesis of a new tetrazolate based porphyrinic MOF. MOF synthesis was also investigated with phenolate functionalised ligands and resulted in the first gallate based porphyrinic MOF reported. The stability of this new material was assessed. This manuscript discusses the synthesis and the characterisation of these MOFs via a combination of experimental techniques (X-ray diffraction, TGA analysis, UV-vis spectroscopy, IR-spectroscopy, sorption studies etc.). The preliminary evaluation of the catalytic activity of some of the MOFs is also described
Huo, Zhaohui. "Polyoxometalate - porphyrin hybrids systems : application for the photocurrent generation and the photocatalysis." Thesis, Strasbourg, 2015. http://www.theses.fr/2015STRAF032/document.
Full textPolyoxometalates-porphyrin hybrid films were synthesized based on covalent or electrostatic interactions. Copolymeric polyoxometalate–porphyrin films were obtained by the electro-oxidation of zinc octaethylporphyrin (ZnOEP) or 5,15-ditolyl porphyrin (H2T2P) in the presence of a different type of polyoxometalates (POMs) bearing two pyridyl groups (py-POM-py). Three type of py-POM-py have been used: i) a tris-alkoxo functionalized Lindqvist polyoxovanadate, ii) an organosilyl functionalized Keggin-type [PW11Si2O40C26H16N2]3- and Dawson-type [P2W17Si2O62C26H16N2]6-, and iii) a bis-pyridine-substituted organo-polyoxometallic bricks using [P2W15V3O62]9− diolamide-grafting method with various geometries of the pendant group. All are applied for photocurrent generation and photocatalytical recovery of metals (Ag and Pt). Electrostatic POM-porphyrin films were also prepared by incorporated Preyssler type polyanion [NaP5W30O110]14- onto the electropolymerized polycationic porphyrin (poly-ZnOEP) with viologen or bis-viologen as spacers. [NaP5W30O110]14- as an efficient electron shuttle between the excited ZnOEP and viologen (or bis-viologen) which effectively retarded the fast charge pair recombination and enhanced the photocurrent magnitude. Later, we introduced nanoparticles POM@MNPs to a bis-porphyrin copolymer through metathesis reaction to further improve the efficiency of the photocurrent generation in which the localized surface plasmon resonance that occurs at the surface of silver nanoparticles has substantially enhanced the electronic excitation of surface-anchored porphyrin
Jones, Liza T. "Nitrogen dioxide sensing using porphyrin and porphyrin-calixarene hybrid LB films." Thesis, University of Sheffield, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.397502.
Full textAlemán, Elvin A. "PHOTOCHEMISTRY AND PHOTOPHYSICAL CHARACTERIZATION OF PORPHYRIN & N-CONFUSED PORPHYRIN DYADS: PORPHYRIN PHOTOPHYSICAL PROPERTIES AND ELECTRON AND ENERGY TRANSFER." University of Akron / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=akron1161633478.
Full textHori, Takaaki. "Studies on giant porphyrin wheels and on aggregation behavior of porphyrin family." 京都大学 (Kyoto University), 2010. http://hdl.handle.net/2433/120685.
Full textPijeat, Joffrey. "Anthracenylporphyrin based building blocks for the bottom-up fabrication of nitrogen-doped graphene nanostructures." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS346/document.
Full textThe synthesis of graphene via bottom-up approach is a hot topic of research that aims to control the electronic and optical properties of this material by the fabrication of atomically precised nanostructures. Moreover, the control of dopant in graphene is of great interest to modulate the properties of the material. In this context, the contribution of porphyrins with a controlled content of nitrogen is attractive in this context. Because of structural similarities with graphene quantum dots (GQDs), π-extented porphyrins can be regarded as nitrogen-doped GQD with promising NIR properties. Porphyrins are convenient building blocks for the synthesis on surface of nanoarchitectures of graphene called nitrogen-doped Graphene Nanoribbons (GNRs) and Graphene NanoMeshes (GNMs). This thesis aims to develop the synthesis of symmetrical and robust porphyrins with anthracenes and to use them as precursors for the fabrication of nanostructures. The first part of this thesis is dedicated to the organic synthesis of variety of anthracenylporphyrins and the study of their assemblies on surface in a chamber of a Scanning Tunneling Microscope. The second part is dedicated to the study of formation of π-extended porphyrins via a method of flash pyrolysis able to thermally activate dehydrogenative coupling reactions between Polycyclic Aromatic Hydrocarbons (PAHs) and porphyrins. The last part is dedicated to the post synthetic modification of a tetrabromoanthracenylporphyrin with additional PAHs via Suzuki-Miyaura coupling and the characterization of the optical properties of the resulting porphyrins
Harper, Shannon R. "Diporphyrins linked by two-atom bridges synthestic, structural and theoretical studies." Thesis, Queensland University of Technology, 2014. https://eprints.qut.edu.au/68643/1/Shannon_Harper_Thesis.pdf.
Full textSedghi, Gita. "Porphyrin single molecular wires." Thesis, University of Liverpool, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.539493.
Full textWebb, Matthew James. "Porphyrin dication association complexes." Thesis, University of Cambridge, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.611573.
Full textMackay, Lindsey Gillian. "Porphyrin-based synthetic enzymes." Thesis, University of Cambridge, 1993. https://www.repository.cam.ac.uk/handle/1810/272641.
Full textMaeda, Chihiro. "Chemistry of Porphyrin Assembly." 京都大学 (Kyoto University), 2010. http://hdl.handle.net/2433/120686.
Full textIkeda, Toshiaki. "Chemistry of Porphyrin Tapes." 京都大学 (Kyoto University), 2009. http://hdl.handle.net/2433/124433.
Full textRajapakse, Nimal. "Oxidations using dioxoruthenium (VI)-porphyrin complexes ; and studies on some organoruthenium-porphyrin species." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/30767.
Full textScience, Faculty of
Chemistry, Department of
Graduate
Chitta, Raghu. "Studies on self-assembled porphyrin-fullerene and porphyrin-carbon nanotube donor-acceptor conjugates." Diss., Wichita State University, 2007. http://hdl.handle.net/10057/1485.
Full textThesis (Ph.D.)--Wichita State University, College of Liberal Arts and Sciences, Dept. of Chemistry
"December 2007."
Chitta, Raghu D'Souza Francis. "Studies on self-assembled porphyrin-fullerene and porphyrin-carbon nanotube donor-acceptor conjugates /." Diss., A link to full text of this thesis in SOAR, 2007. http://hdl.handle.net/10057/1485.
Full textJoseph, Jojo. "Photophysical Characterization of a Series of Self-Assembled Donor-Acceptor Dyads Containing Porphyrin and N-Confused Porphyrin Electron Donors and Studies of the Tautomerization of N-Confused Porphyrins." University of Akron / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=akron1376062678.
Full textMerhi, Areej. "Synthèse de nouveaux assemblages à base de porphyrines organiques et organométalliques pour l’optique." Thesis, Rennes, INSA, 2013. http://www.theses.fr/2013ISAR0022/document.
Full textDuring this thesis, we have worked on the synthesis and characterization of new compounds using the porphyrin macrocycle as a starting material. The aim, after synthesis, is to study the photophysical properties of these new molecules. A general bibliographic study was presented followed by introducing the synthetic methods of porphyrins and characterization means. Then, fluorene was considered to be an attracting unit due to its interesting photophysical properties: acting as efficient antennae for collecting light. First, we have presented the synthesis of porphyrin dendrimers having fluorenyl arms of different generations. That is to test the effect of number of fluorenes on the photophysical properties. Another way is to connect the fluorenes directly to the porphyrin core by synthesizing porphyrin dimer and trimer. We have also detailed the synthesis and characterization of a new family of porphyrin organometallic assemblies possessing ruthenium and iron moieties. In addition, a new organometallic porphyrin dendrimer bearing twelve ruthenium species was reported as well. These organometallic porphyrins are of interest in the third order of Nonlinear Optics (NLO). In the last chapter of this thesis we showed an example of application of porphyrin chemistry. We reported the elaboration of a new organic light emitting Diode (OLED) using these new porphyrins that emits in the red region
Hammel, Jörg U. "Bakteriochlorophyllvorstufen und Pigment-Protein-Komplexe in Rhodospirillum rubrum ST3 und GN11." [S.l. : s.n.], 2006. http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-29780.
Full textAnderson, Sally. "Templated synthesis of porphyrin oligomers." Thesis, University of Cambridge, 1993. https://www.repository.cam.ac.uk/handle/1810/251546.
Full textMacAlpine, Jill. "Chemistry at the porphyrin periphery." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0018/NQ46380.pdf.
Full textHasan, Saleem. "Porphyrin-catalyzed oxidation of trichlorophenol /." Access abstract and link to full text, 1994. http://0-wwwlib.umi.com.library.utulsa.edu/dissertations/fullcit/9500706.
Full textWilson, Craig J. "Large porphyrin-based π-systems." Thesis, University of Oxford, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.432265.
Full textElgie, Kerry J. "Combinatorial methods in porphyrin synthesis." Thesis, University of Essex, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.517452.
Full textWicks, Matthew. "Porphyrin arrays for FET devices." Thesis, University of Oxford, 2004. http://ora.ox.ac.uk/objects/uuid:341c9048-3bdf-4935-92d4-e90519087962.
Full textGibson, Elizabeth. "Porphyrin probes for xanthine oxidase." Thesis, University of York, 2007. http://etheses.whiterose.ac.uk/9915/.
Full textAlemán-García, Miguel Angel. "Porphyrin-based multicomponent supramolecular assemblies." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610305.
Full textLevy, Esther Gillian. "Porphyrin-catalysed acyl transfer reactions." Thesis, University of Cambridge, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.627031.
Full textLiu, Pengpeng. "New templates for porphyrin nanorings." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:7d05f302-7002-4fc2-81ea-fc106a8e2e24.
Full textBludin, Alexey O. "Peptide-Porphyrin Self-Assembled Materials." Bowling Green State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1308097842.
Full textHata, Hiroshi. "Regioselective modifications of porphyrin analogs." 京都大学 (Kyoto University), 2006. http://hdl.handle.net/2433/144217.
Full textGong, Juliane Qiaochu. "Excitation delocalization in porphyrin nanorings." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:94d52e56-be55-4931-9671-1cc178b20489.
Full textChauhan, Prashant. "Porphyrin derivatives for functional nanomaterials." Doctoral thesis, Università degli studi di Padova, 2014. http://hdl.handle.net/11577/3423501.
Full textLa Tesi si compone di due principali temi di ricerca che riguardano le porfirine e la nano-cellulosa. Il progetto sulle profirine è iniziato con la produzione cromofori per celle solari a sensibilizzatore organico. Questi derivati sono stati usati come riferimento per un progetto sulla conversione della luce solare in energia che coinvolge il gruppo di ricerca che mi ha ospitato. Inoltre, sono stati preparati dei dimeri porfirina-porfirina, basati sull’uso di una procedura “one-pot” che impiega la triclorotriazina come linker. Questi derivati sono stati preparati nell’ambito di una collaborazione con la Professoressa Nina Berova (Columbia University) che studia il loro uso per la determinazione della configurazione assoluta di molecole chirali mediante dicroismo circolare. Dopo questo periodo di formazione, il progetto di tesi è proseguito con una ricerca originale, basato sull'uso di click -chemistry per la funzionalizzazione del macrociclo profirinico. Il progetto che riguarda la nanocellulosa, è iniziato con la produzione di cellulosa nanocristallina da cellulosa microcristallina mediante idrolisi acida. La nanocellulosa possiede dei gruppi OH modificabili chimicamente sulla superficie che consentono l'utilizzo di una vasta gamma di reazioni chimiche per la sua funzionalizzazione. Si è quindi studiata la funzionalizzazione della nanocellulosa con un colorante sensibile al pH sulla superficie dei nanocristalli. Inoltre, sono state valutate diverse strategie per la funzionalizzazione superficiale con gruppi cationici (utilizzando 2,3-epossipropil cloruro di trimetil ammonio), ammino (con epicloridrina e 3-amminopropiltrimetossisilano), carbossi (utilizzando persolfato di ammonio e TEMPO). Tra le varie strategie di funzionalizzazione esaminate, la carbossilazione mediata dal TEMPO si è dimostrata efficace e robusta. L'utilizzo di questi materiali e la chimica tipica delle carbodiimidi, ha permesso di legare covalentemente alla nanocellulosa gruppi funzionali come porfirine (che agisce come un sensibilizzatore per la produzione ossigeno singoletto) e un nitro- derivato (in grado di produrre NO sotto illuminazione). Questi materiali sono in fase di studio per verificare il loro potenziale in varie applicazioni terapeutiche.
Biellmann, Thomas. "Edifices porphyrine-diaryléthène : synthèses et propriétés." Thesis, Strasbourg, 2017. http://www.theses.fr/2017STRAF021/document.
Full textThe main purpose of this thesis was the synthesis of new molecular structures, combining dithienylethenes and porphyrins, for applications in molecular electronics and spintronic. Metallated and free base porphyrins bearing four DTEs were characterizes and studied in solution by photochemistry and spectroelectrochemistry. The efficiency of switching of our systems reach 88 percent and strong quenching porphyrin’s fluorescence was reported. New synthetic pathways were investigated to prepare a broader scope of tetraDTEs-porphyrin derivatives. Moreover, to better understand the electronic communications between DTEs and porphyrins, a simpler bis(porphyrin)DTE molecular structure was synthetized and studied. These studies demonstrated showed the important role of the metal on photochromic behavior of dithienylethene – porphyrin architectures
Burgess, Robert Marshall. "Ambient gas effects on thin film porphyrins and on Al/Porphyrin/Ag electroluminescent and electrochemical devices /." Thesis, Connect to this title online; UW restricted, 1986. http://hdl.handle.net/1773/11579.
Full text劉純晶 and Chunjing Liu. "Nonplanar and sterically encumbered ruthenium porphyrins and catalyticreactivity of ruthenium and manganese porphyrin complexes supported onMCM-41." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1998. http://hub.hku.hk/bib/B31237423.
Full textLi, Yingfu. "Catalytic DNA molecules for porphyrin metallation." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq24327.pdf.
Full textCho, Jeongguk. "Porphyrin-catalyzed reduction of nitroaromatic compounds /." Access abstract and link to full text, 1992. http://0-wwwlib.umi.com.library.utulsa.edu/dissertations/fullcit/9307476.
Full textGalia, Aslam B. B. "Photobactericidal properties of porphyrin containing polymers." Thesis, Queen Mary, University of London, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312398.
Full textZuurbier, Richard James. "Novel aspects of platinum porphyrin chemistry." Thesis, Brunel University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.307537.
Full textBlake, Iain M. "Conjugated porphyrin systems for nonlinear optics." Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365889.
Full text