Title
Uticaj Mg(II), Ca (II) i Cu(II) jona na formiranje i karakteristike proizvoda produžene autooksidacije odabranih fenolnih jedinjenja u baznim vodenim rastvorima
Creator
Nikolić, Milica, 1990-
CONOR:
85939721
Copyright date
2022
Object Links
Select license
Autorstvo-Nekomercijalno-Bez prerade 3.0 Srbija (CC BY-NC-ND 3.0)
License description
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Language
Serbian
Cobiss-ID
Theses Type
Doktorska disertacija
description
Datum odbrane: 26. 05 2022.
Other responsibilities
Academic Expertise
Prirodno-matematičke nauke
Academic Title
-
University
Univerzitet u Nišu
Faculty
Prirodno-matematički fakultet
Group
Odsek za hemiju
Alternative title
The influence of Mg(II), Ca(II) and Cu(II) ions on the formation and characteristics of products resulting from prolonged autoxidation of selected phenolic compounds in alkaline aqueous solutions
Publisher
[M. G. Nikolić]
Format
175 listova
description
Bibliografija: listovi 150-167.
description
General and Inorganic Chemistry
Abstract (en)
The goal of this doctoral dissertation is to determine the influence of
the Mg(II), Ca(II) and Cu(II) ions on the formation and characteristics
of products resulting from prolonged autoxidation of selected phenolic
compounds: catechol, 4-methylcatechol, hydroquinone, pyrogallol,
protocatechuic acid, and gallic acid. These specific phenolic
compounds have been chosen because of their presence in both
biological systems and the environment. Furthermore, the ubiquitous
presence of aforementioned biometal ions in these environments
enables their interaction. Autoxidation reactions were carried out in
alkaline aqueous solutions of the particular phenolic compound both in
the absence and in the presence of individual metal ion. Following of
the reaction flow using UV-Vis spectrophotometry and comparing
yields of the obtained products gave insight into the influence of each
of the metal ions used on the rate and efficiency of the autoxidation
process of these diverse phenolic compounds. Obtained products are
characterized using ATR-FTIR, MALDI-TOF mass spectrometry and
ESR spectroscopy. These techniques allowed the determination of
molar masses, degree of polymerization, and paramagnetic properties
of the products, as well as the presence of specific functional groups.
Data acquired during the autoxidation process along with
characteristics of obtained products point to this method being a valid
and economically more viable alternative to production of phenolic
polymers using enzymes. This data also gives insight in the possible
applications of the obtained products.
Authors Key words
autooksidacija, joni biometala, katehol, 4-metilkatehol,
hidrohinon, pirogalol, protokatehinska kiselina, galna
kiselina, fenolni polimeri
Authors Key words
autoxidation, biometal ions, catechol, 4-methylcatechol,
hydroquinone, pyrogallol, protocatechuic acid, gallic acid, phenolic
polymers
Classification
546.4:[542.943:547.565(043.3)
Subject
P 360
Type
Tekst
Abstract (en)
The goal of this doctoral dissertation is to determine the influence of
the Mg(II), Ca(II) and Cu(II) ions on the formation and characteristics
of products resulting from prolonged autoxidation of selected phenolic
compounds: catechol, 4-methylcatechol, hydroquinone, pyrogallol,
protocatechuic acid, and gallic acid. These specific phenolic
compounds have been chosen because of their presence in both
biological systems and the environment. Furthermore, the ubiquitous
presence of aforementioned biometal ions in these environments
enables their interaction. Autoxidation reactions were carried out in
alkaline aqueous solutions of the particular phenolic compound both in
the absence and in the presence of individual metal ion. Following of
the reaction flow using UV-Vis spectrophotometry and comparing
yields of the obtained products gave insight into the influence of each
of the metal ions used on the rate and efficiency of the autoxidation
process of these diverse phenolic compounds. Obtained products are
characterized using ATR-FTIR, MALDI-TOF mass spectrometry and
ESR spectroscopy. These techniques allowed the determination of
molar masses, degree of polymerization, and paramagnetic properties
of the products, as well as the presence of specific functional groups.
Data acquired during the autoxidation process along with
characteristics of obtained products point to this method being a valid
and economically more viable alternative to production of phenolic
polymers using enzymes. This data also gives insight in the possible
applications of the obtained products.
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