Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 84 for “"Phthalocyanine"”.
-
Methane partial oxidation over phthalocyanine catalyst
… of methane over a zeolite-supported ruthenium phthalocyanine catalyst is studied in a packed bed reactor. The investigation of such reaction is desirable because partial oxidation of methane yields a synthesis gas that can be upgraded to liquid chemicals and fuels. Reactants of this study are …
-
Electrochromism of Transition Metal Phthalocyanine Thin Films
… Fe(II), Co(II), Ni(II), and Cu(II), and Zn(II) phthalocyanines on gold or indium oxide electrodes undergo stoichiometric oxidation and rereduction. Excepting FePc and CoPc, the process is essentially reversible. Chronocoulometry showed that ZnPc films oxidized to the extent of 1.21 electrons per …
-
Stability of zinc phthalocyanine and fullerene C60 organic solar cells
Organic solar cells promise electricity generation at very low cost, and higher installation flexibility as compared to inorganic solar cells. The lower cost is achieved by cheaper semiconductors and easier manufacturing processes. The flexibility is naturally given by these ultra-thin, amorphous …
-
Investigations of the optoelectronic behaviour of novel phthalocyanine Langmuir-Blodgett films.
A review of phthalocyanine materials is presented, their history, properties, applications, and potential. The two materials under investigation in this thesis (A410 H[2] and A40iso6 H[2]) are introduced as metal free, non-peripheral octa-substituted phthalocyanines, molecularly engineered for …
-
Electrical and optical properties of novel phthalocyanine compounds for sensor devices.
… are performed for a number of vacuum-sublimed phthalocyanine compounds.Steady state electrical measurements and optical absorption experiments were performed on samples of sublimed heavy fraction rare-earth element, fluorochromium and lutetium bisphthalocyanine films. From the Arrhenius plot of …
-
Electrical and optical properties of novel phthalocyanine compouns for sensor devices
… are performed for a number of vacuum-sublimed phthalocyanine compounds. Steady state electrical measurements and optical absorption experiments were performed on samples of sublimed heavy fraction rare-earth element, fluorochromium and lutetium bisphthalocyanine films. From the Arrhenius plot …
-
Rectifying Properties, Photovoltaic Effects, and Electrochemical Studies of Phthalocyanine Thin Films
Made available in DSpace on 2014-12-13T20:10:30Z (GMT). No. of bitstreams: 1 7913449.pdf: 5385884 bytes, checksum: 6b94fb2fce943e2e0140119da0202192 (MD5) Previous issue date: 1978
-
Degradation study of substituted Iron phthalocyanine molecular electrocatalysts toward oxygen reduction reaction
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-05-01
-
Nucleation and growth of unsubstituted metal phthalocyanine films from solution on planar substrates
… to conventional solar cells. Unsubstituted Metal-phthalocyanines (Pc) are excellent electron donating molecules for heterojunction OSC. Usually organic solar cells with Pcs are produced by vapor deposition, although solution based deposition (like spin casting) is cheaper and offers more …
-
The Photophysics and Transport Properties of Non-Covalent Silicon Phthalocyanine Gold Nanoparticle Conjugates
… the non-covalent interactions between silicon phthalocyanine 4 (Pc 4) and polyethylene glycol coated gold nanoparticles (PEGylated Au NPs) through photophysics and transport studies. A detailed investigation of Pc 4’s photophysical behavior in water both with and without Au NPs is presented, …
-
Structural studies of Copper Tetra-Tert-Butyl Phthalocyanine Langmuir-Blodgett and vacuum deposited films
The Langmuir-Blodgett (LB) technique was employed to fabricate thzn films of Copper-Tetra-Tert-Butyl Phthalacyanine (CuTTBPc). However, CuTTBPc has a strong tendency to aggregate and hence inhibit the synthesis of uniform layers. It has been found that the incorporation of Arachidic Aczd (AA) can …
-
Temperature-dependent structures of heteroepitaxial metallo-phthalocyanine (Mpc, M = Cu, Fe) thin films on silver.
Metallo-phthalocyanines (MPcs, M = Cu, Fe) thin films were formed on Ag(111) surface by vapor deposition in ultra high vacuum (UHV). The morphology and structure of the MPcs were studied by scanning tunneling microscope (STM). Submonolayer (sub-ML) MPcs deposited at room temperature (RT) without …
-
Kinetic analysis of thiol oxidation to study the effects of fluorinated groups on metal phthalocyanine catalysts
… 4-fluorobenzenethiol (4-FBT) catalyzed by cobalt phthalocyanines: H_{16}PcCo, F_{16}PcCo, and F_{64}PcCo, each exhibiting a metal center subject to increasing Lewis acidity and steric hindrance. The experiments were performed in a reaction-limited, isothermal, bench-scale, semi-batch reactor, with …
-
The Electronic and Vibrational Spectroscopy of Metal Phthalocyanines and Metal Phthalocyanine Chlorides Isolated in Low Temperature Solids
Phthalocyanines (Pcs) are an important class of dye molecules, capable of incorporating a wide range of metal atoms into their macrocyclic cavity and can be heavily substituted on their outer carbons. These highly stable molecules play an important role not only in the commercial dye industry, but …
-
Contracted phthalocyanine macrocycles: Conjugation with nanoparticles and the first synthesis of meso-substituted Boron SubTriBenzoDiAzaPorphyrin hybrids (SubTBDAPs)
… thesis is concerned with the attachment of subphthalocyanines to quantum dots. The macromolecule was chosen as encapsulant due to its perfect curvature and interesting optical properties. CdSe quantum dots are well-known materials with size-dependent properties that makes them unique. Hence, …
-
Tetrasulphonated phthalocyanine thin films deposited on gold electrodes : a study using voltammetry and synchrotron micro X-ray fluorescence
Het doel van dit werk was de studie van de modificatie van goudelektroden met kobalt(II)tetrasulfoftalocyanine (CoTSPc) en 3,4’,4’’,4’’’ koper(II)-tetrasulfoftalocyanine in een pH 12 bufferoplossing. Een beter begrip van de karakteristieken van de ftalocyaninelagen op de elektrode maakt immers de …
-
Aspects of Photovoltaic Systems: Study and Simulation of Silicon Phthalocyanine Bulk Heterojunction Solar Cells and Monochromatic Photonic Power Converters
… assessed using the acceptor molecule silicon phthalocyanine (bis(tri-n-butyl silyl oxide) silicon phthalocyanine ((3BS)2-SiPc) as a potential low-cost non-fullerene alternative to the typical acceptor [6,6]-phenyl-C61-butyric acid methyl ester (PC₆₁BM). These acceptors are compared within …
-
Covalently Linked Dyads and Triads of Phthalocyanines and Porphyrins
The phthalocyanines are a family of intensively coloured compounds, with some important properties and are classified as important materials for many applications. Structurally, a phthalocyanine is similar to a porphyrin. In chapter one, a brief introduction of their synthesis, properties, and …
-
THE MODIFICATION OF ELECTROCHEMICAL AND PHOTOELECTROCHEMICAL PROPERTIES IN THIN FILMS OF TRI- AND TETRAVALENT METAL PHTHALOCYANINES
Four different trivalent and tetravalent metal phthalocyanine systems (chlorogallium, chloroindium, vanadyl, and titanyl phthalocyanines) were used singly to prepare thin films (0.05-2.0 micron thickness) on gold, optically transparent substrates. The photoelectronic properties of these electrodes …
-
Understanding the factors which Influence the interactions of iron (II) and iron (III) in porphyrins and the chemistry of silicon phthalocyanine
… chloride [Fe(III)TPPCl] and silicon phthalocyanine di-4pyridinecarboxylic acid [Si-Pc(4PyCOO)2]. The synthesis of tetraphenylporphyrin (H2TPP) and Fe(III)TPPCl was achieved and verified using CHN analysis, UV spectrometry and ambient pressure Mössbauer spectroscopy. However the …
Page 1 of 5