Master of Science (MS)
Chemistry and Biochemistry
First Committee Member
Pradip K. Bhowmik
Second Committee Member
Vernon F. Hodge
Third Committee Member
Fourth Committee Member
Laxmi P. Gewali
Number of Pages
Pyrylium salts are an important class of cationic organic molecules that exhibit good absorption, fluorescence, and photo-induced electron transfer properties. They can also function as precursors for synthesis of different heterocyclic organic molecules such as furan, pyridine, pyridinium salt, and betaine dyes. This thesis describes versatile methods of synthesis for a series of 2,4,6-triarylsubstitued pyrylium tosylates with different substituents by using p-toluenesulfonic acid monohydrate instead of conventional acid catalysts including perchloric acid or boron trifluoride diethyl etherate that accompany explosion danger and difficult storage problem, respectively. The chemical structures were established by 1H and 13C NMR spectroscopic techniques and elemental analysis, and their thermal properties were studied by thermal gravimetric analysis (TGA) and differential scanning calorimetry (DSC). Their optical properties including quantum efficiency were measured by UV-Vis and photoluminescent spectroscopy, and they emitted blue and green color depending on the substituents in 2- and 6-positions of phenyl groups.
ionic salt; photoluminescent salt; Pyrylium salt
University of Nevada, Las Vegas
Koh, Jung Jae, "Versatile Synthetic Methods for Photoluminescent Pyrylium Tosylates" (2015). UNLV Theses, Dissertations, Professional Papers, and Capstones. 2487.
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