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 71 for “"thermolysis"”.
-
Model pathways in lignin thermolysis
Thesis (Sc.D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1981.
-
Thermolysis of multiply-methylated acenes : experiments and mechanicstic modelling
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1996.
-
Binder distribution processes in ceramic green tapes during thermolysis
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1991.
-
Synthesis of benzocarbazoles, indoloquinolines and indolonaphthridines from thermolysis of benzoenynyl ketenimines and carbodiimides
The development of a general route to the N-[2-(1-alkynyl)phenyl]ketenimines (enyne-ketenimines) and N-[2-(1-alkynyl)phenyl]carbodiimides (enyne-carbodiimides) and their subsequent thermal behavior are described. Like enyne-allene and enyne-ketene systems, these enyne-hetereocumulenes undergo …
-
An investigation of the gas phase thermolysis of hexaborane (10) by quantitative mass spectrometry
… the composition of the mixture. The gas phase thermolysis of hexaborane(10) has been studied by this method for pressures in the range 1-10 mmHg, and at temperatures between 75 and 153°C. Hexaborane(10) is found to decompose by a second order process having an activation energy of 79 ± 5 kJ mol …
-
Thermolysis Route for Accessing Amorphous Metal Sulfide Thin-Film Catalysts for the Hydrogen Evolution Reaction
In this work, low temperature thermolysis of metal ethyl xanthates (M = Mo, Co, Fe, Ni) was used to prepare amorphous metal and mixed metal sulfide films on fluorine-doped tin oxide for the hydrogen evolution reaction (HER). Films prepared by dip-coating showed optimal coverage, as monitored by …
-
Metal deposition on TiO2(110) via thermal evaporation, photolysis and thermolysis: a combined FT-RAIRS and XPS study
Model systems combined with surface science techniques provide a powerful tool for the study of oxide supported metal overlayers. This thesis describes the synthesis and characterisation of Cu, Mo and Au overlayers on TiO2(110) deposited using a number of methods.<br/>Cu overlayers were deposited …
-
Low-pressure chemical vapor deposition by thermolysis of disilane for low-temperature fabrication of pn junction solar cells
<p>A low-pressure chemical vapor deposition (LPCVD) reactor was built in order to implement a low-temperature process to deposit thin-films of silicon and fabricate pn junction photovoltaic devices using disilane as the source gas. This work represents the first reported work on using disilane for …
-
Part One: Ozonolysis of Diphenylvinylene Carbonate. Synthesis and Thermolysis of Dibenzoyl Monoperoxycarbonate. Part Two: Singlet Oxygen: The Lifetime of Singlet Oxygen in Solution and Its Reaction With Ene-Type Olefins
… mechanism for ozonolysis of most olefins. The thermolysis of dibenzoyl monoperoxycarbonate in benzene is also reported. The products of that thermolysis are very similar to the products of benzoyl peroxide thermolysis, but the rate of decay is significantly faster. The activation parameters for …
-
Part I. Synthesis and thermolysis of cyclopentadienyl and pentamethylcyclopentadienyl molybdenum dioxo alkoxides. Part II. Structural characterization of polysilicate intermediates formed during sol-gel polymerization
… $<$ ethoxide $<$ 2-propoxide $<$ t-butoxide. Thermolysis of CpMoO$\sb2$ (OCH$\sb2$(CH$\sb3)\sb2$)) at 55$\sp\circ$C in CD$\sb3$CN produced, after a ten minute induction period in which no organic products were observed, equal amounts of acetone and 2-propanol. Thermolysis of …
-
I. Dissociation and aromatization of a semibenzene. Reactions of triphenylmethyl and methyl isobutyryl radicals. II. The chemistry of alpha- and beta- azo radicals
… (5), affords exactly these intermediates on thermolysis or, inefficiently, on direct photolysis. Whereas thiophenol or triplet 9-fluorenone aromatize 1, thermolysis in the presence of 1,4-cyclohexadiene allows trapping of 5 and oligomeric radicals. From the measured heat of aromatization, the …
-
Cracking Meldrum's Acid: Lowering the Temperature
… the C2 and C5 residues of Meldrum's acid on the thermolysis pathway, which is currently unknown to literature. A library of 17 varying C2 substituted Meldrum's acids were prepared. The thermolytic behaviour of these compounds were investigated through thermogravimetric analyses. A constraining …
-
Cracking Meldrum's Acid: Lowering the Temperature
… the C2 and C5 residues of Meldrum's acid on the thermolysis pathway, which is currently unknown to literature. A library of 17 varying C2 substituted Meldrum's acids were prepared. The thermolytic behaviour of these compounds were investigated through thermogravimetric analyses. A constraining …
-
Part One: Photochemistry of Aryl Azides. Chemical Properties of the Transient Intermediates. Part Two: Thermolysis of an Endoperoxide. Generation of an O-Xylylene Peroxide (Nitrene)
One. The photochemistry of phenyl azide, 1-naphthyl azide, 2-naphthyl azide, 1-anthryl azide, 2-anthryl azide, 1-pyrene azide, and 2-pyrene azide was examined by laser flash photolysis inert and reactive solvents. The products of direct photolysis of the aryl azides can depend dramatically on the …
-
Mechanistic Studies of the Chemical Vapor Deposition of Ceramic and Metal Films From Organometallic Precursors
Investigations of the thermolysis of tetra(neopentyl)titanium (TiNp$\sb4$) in solution have been carried out in parallel with studies of the chemical mechanism responsible for its conversion to titanium carbide under CVD conditions. A kinetic isotope effect $(k\sb{\rm\alpha (H)}/k\sb{\rm\alpha (D)} …
-
Synthesis of a Series of Secondary Peresters: An Investigation of Their Thermolyses and Chemiluminescence
… were investigated. Thermolysis in benzene gives acetophenone and the corresponding carboxylic acid. The study of the reaction kinetics and kinetic isotope effect indicate that the unimolecular thermolysis proceeds by homolysis of the oxygen-oxygen bond. Electronically …
-
Chemiluminescence From the Thermal Decomposition of 1,4-Diphenyl-1,4-Dioxa-2-Benzopyran-3-One. Direct and Indirect Luminescence Involving an Ortho-Xylylene Peroxide
… and phenyl-(o-benzoyl) benzoate upon thermolysis in p-xylene at 112(DEGREES)C. Chemiluminescence is observed during the decomposition of the endoperoxide. Light is also produced when 37 is heated to 112(DEGREES)C in the presence of added fluorescers. The direct chemiluminescence is the …
-
Stereoselective Synthesis of Trisubstituted Olefins
… phosphonamidates followed by their thermolysis to provide trisubstituted olefins in extremely high geometrical purity ($>$99/1).
-
Controlling ceramic porosity using carboxylate-alumoxane nanoparticles
… into 94 nm pore sized alumina ceramics, and upon thermolysis forming a homophase, Al2O3, ceramic composite. When the alumoxanes are doped with metals forming MxAlyOz upon thermolysis, a heterophase ceramic composite forms. The additional ceramic material (either a homo or hetero-layer) into the …
-
Silenes: Novel Reagents for Organic Synthesis
… dienes were studied. Silenes, generated by the thermolysis of acylpolysilanes, add to α,β-unsaturated esters to form silacyclobutanes and silyl-substituted cyclopropanes in moderate yields. Upon silicon-carbon bond oxidation the cyclopropanes were converted directly to 1,4-dicarbonyl compounds, …
Page 1 of 4