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Full-Text Articles in Physical Sciences and Mathematics
Physical Properties Of Traditional And Water-Miscible Oil Paints As Assessed By Single-Sided Nmr, Nicholas Anthony Sanchez Udell
Physical Properties Of Traditional And Water-Miscible Oil Paints As Assessed By Single-Sided Nmr, Nicholas Anthony Sanchez Udell
Dissertations, Theses, and Masters Projects
Single-sided NMR has been demonstrated as a useful technique for the inexpensive and non-invasive study of cultural heritage objects, including numerous different painting and paint samples. The relatively recent invention of water-miscible oil paints – a new form of environmentally friendly oil paint that can be thinned and cleaned by water – provides a need for analysis of the physical properties of the cured paint films. Single-sided NMR offers an excellent analytical tool to study the structural effects of the emulsifying agent present in water-miscible oil paints on the paint linoxyn network by measuring the transverse (T2) relaxation times for …
Synthesis, Structure And Optical Memory Properties Of Copper (I) Thiocyanate Networks With Aromatic Amines, Diimines And Alkyl Sulfides, Gerardo Ayala
Synthesis, Structure And Optical Memory Properties Of Copper (I) Thiocyanate Networks With Aromatic Amines, Diimines And Alkyl Sulfides, Gerardo Ayala
Dissertations, Theses, and Masters Projects
A series of CuSCN compounds were synthesized. Ligands included the alkyl sulfides methyl sulfide (Me2S), ethyl sulfide (Et2S), isopropyl sulfide (Pri2S) and tetrahydrothiophene (THT); diimine ligands pyrazine (Pyz), 2,3-dimethylpyrazine (2,3- Me2Pyz), 2,5-dimethylpyrazine (2,5-Me2Pyz), 2-aminopyrazine (2-NH2Pyz) and 2- methoxypyrazine (2-MeOPyz); two-ring diimines quinoxaline (Qox), quinazoline (Qnz), phthalazine (Ptz); and 3-halopyridines 3-chloropyridine (3-ClPy), 3-bromopyridine (3- BrPy), 3-iodopyridine (3-IPy). Crystal structures were solved for twelve products. With the exception of one Cu(II) compound, all could be classified in the common motifs of chains, ladders or sheets. Alkyl sulfides formed either 1:2 (CuSCN)L2 1-D chains (L = Me2S, 1a and THT, 4) or 1:1 …
Dye-Sensitized Tio2 Modified With Iron Polypyridyl Catalyst For Photocatalytic Hydrogen Evolution, Wanji Zhang
Dye-Sensitized Tio2 Modified With Iron Polypyridyl Catalyst For Photocatalytic Hydrogen Evolution, Wanji Zhang
Dissertations, Theses, and Masters Projects
Artificial Photosynthesis (AP) focuses on finding a way to harness solar energy to generate a chemical fuel. TiO2 semiconductors are of interest to AP research due to its relatively low cost and widespread use as an efficient charge-separating support. This research focuses on the development of a device for photocatalytic hydrogen generation. Our approach utilizes the immobilization of iron polypyridyl catalysts and ruthenium chromophores on TiO2 through stable phosphonic acid anchoring groups.
Gas-Phase Thermochemical Properties Of Proline-Containing Dipeptides And Fluorinated Alcohols Using The Extended Kinetic Method, Kathy Tang Huynh
Gas-Phase Thermochemical Properties Of Proline-Containing Dipeptides And Fluorinated Alcohols Using The Extended Kinetic Method, Kathy Tang Huynh
Dissertations, Theses, and Masters Projects
No abstract provided.
Expanding The Scope Of Terminal Alkynes In Chemical Biology, Johnathan Charles Maza
Expanding The Scope Of Terminal Alkynes In Chemical Biology, Johnathan Charles Maza
Dissertations, Theses, and Masters Projects
The terminal alkyne is one of the most widely used chemical moieties in chemical biology. Thanks to the relative absence of this functional group in biology, it has become a widespread functional handle for a plethora of biorthogonal chemistries. Our group has extended the scope of this functionality by developing a biological variant of the Glaser-Hay coupling, which brings together two terminal alkynes to form a diyne linkage. However, our initial findings revealed that the chemistry is plagued by protein degradation due to a deleterious copper(II) hydroxyl intermediate. Herein we extend the scope of the terimanl alkyne be developing a …