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Identifier

uch.chemistry.msc//2002birikaki

Title

Φωτοοξειδώσεις αλκενίων και αρωματικών αλκανίων με φωτοευαισθητοποιητή το Υδατοδιαλυτό σύμπλοκο γ-κυκλοδεξτρίνη / C60

Alternative Title

Photooxidations of alkenes and aromatic alkanes with the water-soluble complex γ-Cyclodextrine/C60 as photosensitizer

Creator

Birikaki, Lemonia

Abstract

In this dissertation, the photosensitizing properties of the water-soluble inclusion complex of C60 with two molecules of γ-cyclodextrine (γ-CD/C60) will be described. To this purpose, photooxidation of several alkenes and aromatic alkanes were performed in polar solvents with the γ-CD/C60 complex as photosensitizer. The most important findings are summarized as follows: The γ-CD/C60 complex photosensitizes the oxidation of alkenes and also aromatic alkanes in polar solvents and in very low concentrations (~ 10-5 M). The photooxygenation of aryl-substituted alkenes produces both, singlet oxygen and electron transfer induced products. With the alkyl-substituted alkenes only the ene products (via singlet oxygen) were obtained. It is known that the cyanoaromatic sensitizers sensitize the photooxidations of alkenes by these two distinct mechanisms. The γ-CD/C60 complex photosensitizes the oxidation of aromatic compounds in the presence of methyl viologen (MV+2) to produce oxygenated compounds via an electron transfer process. The photocatalytic properties of γ-CD/C60 complex are comparable with those of the electron-deficient sensitizer 9,10-dicyanoanthracene.

Issue date

2002-03-01

Date available

2002-03-29

Collection

School/Department--School of Sciences and Engineering--Department of Chemistry--Post-graduate theses

Type of Work--Post-graduate theses

Permanent Link

https://elocus.lib.uoc.gr//dlib/a/a/6/metadata-dlib-2002birikaki.tkl

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