TY  - JOUR
A1  - Bold, Kevin
A1  - Stolte, Matthias
A1  - Shoyama, Kazutaka
A1  - Krause, Ana‐Maria
A1  - Schmiedel, Alexander
A1  - Holzapfel, Marco
A1  - Lambert, Christoph
A1  - Würthner, Frank
T1  - Macrocyclic Donor‐Acceptor Dyads Composed of Oligothiophene Half‐Cycles and Perylene Bisimides
JF  - Chemistry – A European Journal
N2  - A series of donor‐acceptor (D−A) macrocyclic dyads consisting of an electron‐poor perylene bisimide (PBI) π‐scaffold bridged with electron‐rich α‐oligothiophenes bearing four, five, six and seven thiophene units between the two phenyl‐imide substituents has been synthesized and characterized by steady‐state UV/Vis absorption and fluorescence spectroscopy, cyclic and differential pulse voltammetry as well as transient absorption spectroscopy. Tying the oligothiophene strands in a conformationally fixed macrocyclic arrangement leads to a more rigid π‐scaffold with vibronic fine structure in the respective absorption spectra. Electrochemical analysis disclosed charged state properties in solution which are strongly dependent on the degree of rigidification within the individual macrocycle. Investigation of the excited state dynamics revealed an oligothiophene bridge size‐dependent fast charge transfer process for the macrocyclic dyads upon PBI subunit excitation.
KW  - donor-acceptor dyad
KW  - macrocycle
KW  - oligothiophene
KW  - perylene bisimide
KW  - photoinduced electron transfer
Y1  - 2022
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-276435
VL  - 28
IS  - 30
ER  - 
TY  - THES
A1  - Schulze, Marcus
T1  - Ruthenium Complexes as Water Oxidation Catalysts and Photosensitizers
T1  - Rutheniumkomplexe als Wasseroxidationskatalysatoren und Photosensibilisatoren
N2  - In der vorliegenden Arbeit werden Aspekte der photokatalytischen Wasseroxidationsreaktion behandelt. Der erste Themenschwerpunkt der Dissertation beschäftigt sich mit einem supramolekularen Makrozyklus, der drei Rutheniummetallzentren enthält. Dieser neuartige Katalysator zeigt eine sehr hohe katalytische Aktivität und gewährt neue Einblicke in den Mechanismus der Wasseroxidationsreaktion. Des Weiteren wird auf die  mit Licht interagierenden Komponenten der photokatalytischen Wasseroxidation eingegangen. Hierbei haben sich azabenz-anellierte Perylenderivate als vielseitige Farbstoffklasse herausgestellt. Die Kombination dieser Farbstoffe mit Metallkomplexen liefert metallorganische Verbindungen, die als Photosensibilisatoren eingesetzt werden können.
N2  - The thesis discusses aspects of the photocatalytic water oxidation reaction. The first chapter deals with a supramolecular macrocycle which contains three ruthenium metal centers. This novel catalyst shows promising catalytic activity and provides insides into the mechanism of the water oxidation reaction.  After this part, the focus lies on the light interacting components of the photocatalytic water oxidation.  In this regard, the azabenz-annulated perylene derivatives appeared to be a promising dye class. The combination of these chromophores and metal complexes result in metal organic compounds, which have photosensitizer potential.
KW  - Farbstoff
KW  - Ruthenium
KW  - Fotokatalyse
KW  - Photosensibilisator
KW  - Makrozyklus
KW  - macrocycle
KW  - Wasseroxidationsreaktion
KW  - water oxidation reation
KW  - Perylen-Farbstoffe
KW  - perylene dyes
KW  - Katalyse
KW  - Wasserspaltung
Y1  - 2016
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-142454
ER  -