Studies towards green oxidation of alcohols with visible light

Download

index.pdf

Date

2014

Author

Akkaş, Kıvanç

Metadata

Show full item record

Item Usage Stats

260
views

88
downloads

Conversion of alcohols to the corresponding carbonyl compounds is one of the key reactions in organic chemistry. For this, numerous methods have been developed. However, most of these methods produce environmentally hazardous waste. With this in mind, an environmentally benign method was attempted to be developed. The idea was borrowed from Dye Sensitized Solar Cells (DSSC); electron relay mechanism in DSSC to be replaced with oxidation of alcohols. First, TiO2 as metal oxide and O2 as electron acceptor were used. The benzyl alcohol was added to the dye and TEMPO included TiO2/O2 system to yield benzaldehyde, but the method failed in our hands. However, when ZnO as metal oxide and Ag+ as electron acceptor were used, the reaction converted alcohols to the corresponding aldehydes. Our contribution in this thesis is reducing the diffusion control to increase the rate of reaction. To this end, TEMPO incorporated dyes were developed and synthesized.

Subject Keywords

Alcohol., Aldehydes., Oxidation., Light.

URI

http://etd.lib.metu.edu.tr/upload/12616779/index.pdf
https://hdl.handle.net/11511/23267

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Novel Mesoporous Nanocomposite WOx-Silicate Acidic Catalysts: Ethylene and Diethylether from Ethanol Varisli, Dilek; Doğu, Timur; DOĞU, GÜLŞEN (2009-11-04) Solid acid catalysts are extensively used in a number of industrially important catalytic reactions. Here, water-insoluble novel mesoporous solid acid catalysts, with a unique structure composed of WOx nanorods and W nanoballs within an amorphous silicate lattice, were synthesized following a one-pot hydrothermal route. using silicotungstic acid (STA) as the active component. Surface area of these catalysts ire more than 2 orders of magnitude higher than that of pure STA, and they showed very high activity ...
Novel conversion of thiols into disulfides, via S-nitrosothiol intermediates using trichloronitromethane Demir, Ayhan Sıtkı; Igdir, AC; Mahasneh, AS (1999-10-15) An efficient oxidative coupling of thiols to give disulfides via thionitrite (S-nitrosothiol) intermediate is described using trichloronitromethane as an efficient reagent in organic solvents and water. Cysteine and glutathione are converted into the corresponding disulfides in water in high yields.
An investigation of the formation mechanism of allene or alkyne in the 6,7-benzobicyclo[3,2.1]octane system by deuterium labeling experiments Taskesenligil, Y; Tumer, F; Kazaz, C; Balcı, Metin (1999-01-01) In order to reveal the real intermediate in the base-promoted reaction of 1, 3-bromo-4,4-dideuterio-6,7-benaobicyclo[3.2.1]octa-2,6-diene 10 was synthesized and its HBr elimination reaction studied. Reaction of 10 with potassium tert-butoxide yielded butoxyl ether 18 in which proton-deuterium exchange has occured.
Mn(OAc)3 promoted addition of an active methylene compound to alkenes: mechanistic studies Ceyhan, Selin; Balcı, Metin; Department of Chemistry (2015) Radical cyclization of alkenes is one of the most important methods for the synthesis of cyclic compounds. The one electron oxidant Mn(OAc)3 has been used for many years for the oxidative addition of acetic acid to alkenes to give lactones. In this thesis, various alkenes substituted at 1,2-positions by phenyl and thiophene rings were reacted with active methylene compounds in the presence of Mn(OAc)3∙2H2O. The regioselectivity of the addition were searched. The mechanism for the addition was studied in con...
A new synthesis of bromobenzotropones: Oxidation of 8-bromo-5H-benzo[a]cycloheptene Dastan, A; Yildiz, YK; Kazaz, C; Balcı, Metin (2002-01-01) The oxidation of 8-bromo-5H-belizo[a]cycloheptene with some oxidation reagents was studied. 2,3-and 4,5-benzotropone derivatives were obtained. The structures of the bromobenzotropones were determined by H-1- and C-13-NMR data.

Citation Formats

K. Akkaş, “Studies towards green oxidation of alcohols with visible light,” M.S. - Master of Science, Middle East Technical University, 2014.