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Identifier |
000443006 |
Title |
Εφαρμογές νανοσωματιδίων μετάλλων και μεταλλοοργανικών σκελετών στην ετερογενή κατάλυση οργανικών μετασχηματισμών |
Alternative Title |
Applications of metal nanoparticles and metal organic frameworks in the heterogenous catalysis of organic transformations |
Author
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Λουκά, Αναστασία Α
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Thesis advisor
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Στρατάκης, Εμμανουήλ
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Reviewer
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Βασιλικογιαννάκης, Γεώργιος
Τρικαλίτης, Παντελής
Σμόνου, Ιουλία
Νεοχωρίτης, Κωνσταντίνος
Λυκάκης, Ιωάννης
Βουγιουκαλάκης, Γεώργιος
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Abstract |
In the present thesis were studied new applications of gold and palladium
nanoparticles as catalysts on a variety of organic transformations, as well as preliminary
studies regarding the CO2 fixation on epoxides catalyzed by a Zr-metal organic
framework.
In the First Chapter is described the superior reactivity of a dihydrosilane
(diethylsilane), as compared to monohydrosilanes, towards a series of reductive
transformations catalyzed by Au nanoparticles supported on TiO2. Furthermore, an
unprecedented method for the synthesis of N-arylisoindolines is also shown. The
exceptional reductive ability of diethylsilane is ascribed to the formation of reactive
Au-dihydrides on the surface of the nanoparticle.
In the Second Chapter, the Au nanoparticle-catalyzed activation of the Ge-H
and Ge-Ge bonds of hydrogermanes and digermanes and their accompanying addition
to alkynes and allenes forming vinylgermanes is reported for the first time in the
literature. Additionally, the results regarding the Pd nanoparticle-catalyzed C-C
coupling of 1,2-digermyl alkenes with aryl iodides are provided.
In the Third Chapter, the deoxygenation of epoxides catalyzed by Au
nanoparticles using a digermane as the oxygen atom acceptor is presented for the first
time in the literature. The reaction is selective for mono- and di-substituted epoxides.
Moreover, stereoisotopic and kinetic studies showed that the deoxygenation of alkyl
epoxides takes place with retention of stereochemistry, whilst in the case of aryl
epoxides partial inversion is observed, indicative of a polar mechnism
In the Fourth Chapter, preliminary mechanistic studies of the CO2 fixation
reaction with epoxides catalyzed by a Zr MOF (PCN-521) forming cyclic carbonates
are presented. However, it is crucial that more experiments are yet to be carried out in
order to extract confirmed mechanistic conclusions.
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Language |
Greek |
Subject |
Alkynes |
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Allenes |
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C-C coupling |
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C-C σύζευξη |
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CO2 fixation on epoxides |
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Cyclic carbonates |
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Diethylsilane |
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Digermanes |
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Epoxides |
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Gold nanoparticles |
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Hydrogermanes |
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Metalorganic frameworks |
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N-arylisoindolines |
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Reduction |
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Reductive amination |
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Αλκύνια |
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Αλλένια |
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Αναγωγή |
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Αναγωγική αμίνωση |
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Διαιθυλοσιλάνιο |
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Διγερμάνια |
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Εποξείδια |
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Κυκλικοί ανθρακικοί εστέρες |
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Μεταλλοοργανικοί σκελετοί |
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Ν-αρυλοισοινδολίνες |
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Νανοσωματίδια χρυσού |
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Σύζευξη CO2 με εποξείδια |
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Υδρογερμάνια |
Issue date |
2021-11-02 |
Collection
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School/Department--School of Sciences and Engineering--Department of Chemistry--Doctoral theses
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Type of Work--Doctoral theses
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Permanent Link |
https://elocus.lib.uoc.gr//dlib/7/3/6/metadata-dlib-1634641585-289014-1460.tkl
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Views |
450 |
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