Stefan Bauroth
University of Erlangen-Nuremberg
Electron transferElectronPhotoexcitationChemical physicsFullereneNanotechnologyMolecular wireCovalent bondExcited stateChemistryMaterials scienceElectron donorPorphyrinAcceptorElectron acceptorAttenuation factorMicrosecondElectrochemistryPhotochemistrySupramolecular chemistryUltrafast laser spectroscopy
Publications 12
#1Anna Zieleniewska (FAU: University of Erlangen-Nuremberg)H-Index: 6
#2Xiaotao Zhao (Durham University)H-Index: 8
Last. Dirk M. Guldi (FAU: University of Erlangen-Nuremberg)H-Index: 113
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There are notably few literature reports of electron donor-acceptor oligoynes, even though they offer unique opportunities for studying charge transport through "all-carbon" molecular bridges. In this context, the current study focuses on a series of carbazole-(C≡C)n-2,5-diphenyl-1,3,4-oxadiazoles (n = 1-4) as conjugated π-systems in general and explores their photophysical properties in particular. Contrary to the behavior of typical electron donor-acceptor systems, for these oligoynes, the rat...
3 CitationsSource
#2Jan Joseph (FAU: University of Erlangen-Nuremberg)H-Index: 2
Last. Tomás Torres (IMDEA)H-Index: 97
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#1Maximilian Wolf (International Council on Mining and Metals)H-Index: 4
#2Dominik Lungerich (University of Oxford)H-Index: 13
Last. Dirk M. Guldi (International Council on Mining and Metals)H-Index: 113
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Here, we present a novel butadyine-linked HBC-ethynyl-porphyrin dimer, which exhibits in the ground state strong absorption cross sections throughout the UV and visible ranges of the solar spectrum. In short, a unidirectional flow of excited state energy from the HBC termini to the (metallo)porphyrin focal points enables concentrating light at the latter. Control over excitonic interactions within, for example, the electron donating porphyrin dimers was realized by complexation of bidentate liga...
3 CitationsSource
#1Tomás Torres (UAM: Autonomous University of Madrid)H-Index: 97
#1Eduardo Anaya-Plaza (UAM: Autonomous University of Madrid)H-Index: 8
Last. Dirk M. Guldi (FAU: University of Erlangen-Nuremberg)H-Index: 113
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In the scientific race to build up photoactive electron donor-acceptor systems with increasing efficiencies, little is known about the interplay of their building blocks when integrated into supramolecular nanoscale arrays, particularly in aqueous environments. Here, we describe an aqueous donor-acceptor ensemble whose emergence as a nanoscale material renders it remarkably stable and efficient. We have focused on a tetracationic zinc phthalocyanine (ZnPc) featuring pyrenes, which shows an unpre...
3 CitationsSource
#1Ramandeep KaurH-Index: 4
#2Fabio Possanza (University of Rome Tor Vergata)H-Index: 3
Last. Dirk M. GuldiH-Index: 113
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We have probed a series of multicomponent electron donor2-donor1-acceptor1 conjugates, both experimentally and computationally. The conjugates are based on the light harvester and primary electron-...
17 CitationsSource
#1Bingzhe Wang (FAU: University of Erlangen-Nuremberg)H-Index: 4
#2Stefan Bauroth (FAU: University of Erlangen-Nuremberg)H-Index: 6
Last. Dirk M. Guldi (FAU: University of Erlangen-Nuremberg)H-Index: 113
view all 7 authors...
The current work focuses on self-assembled nano-architectures in which metal–ligand coordination between a zinc tetraphenyl-porphyrin (ZnP) and a zinc tetrakis(4-((1,3-dithiol-2-ylidene)methyl)phenyl)-porphyrin (ZnP-TDP), as electron donors, and functionalized fullerenes (C60) featuring different conjugated pyridine substituents as electron acceptors have been designed and investigated. Stoichiometric ratios and binding constants were derived from absorption and fluorescence measurements. Import...
9 CitationsSource
#1Peter W. Münich (FAU: University of Erlangen-Nuremberg)H-Index: 3
#2Christoph Schierl (FAU: University of Erlangen-Nuremberg)H-Index: 6
Last. Dirk M. Guldi (FAU: University of Erlangen-Nuremberg)H-Index: 113
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Different water-soluble perylenediimides (PDIs) have been used to individualize and stabilize single-walled carbon nanotubes (SWCNTs) in aqueous media. A key feature of the PDIs is that they can be substituted at the bay positions via the addition of two and/or four bromines. This enables control over structural and electronic PDI characteristics, which prompted us to conduct comparative assays with focus on SWCNTs’ chirality and charge transfer. Electrochemical, microscopic, and spectroscopic e...
11 CitationsSource
#1Konstantin DirianH-Index: 7
#2Stefan BaurothH-Index: 6
Last. Dirk M. GuldiH-Index: 113
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The aggregation and the photophysics of a water soluble perylenediimide (PDI) derivative that features two bromine substituents in the bay positions has been probed. Non-fluorescent aggregates were found to be present at concentrations of 1.0 × 10−5 M. In situ small-angle X-ray scattering (SAXS) measurements and complementary molecular modeling showed the presence of PDI aggregates. In their singlet excited states, the PDI aggregates are characterized by distinct transient fingerprints and rapid...
8 CitationsSource
#1Gilles Yzambart (Durham University)H-Index: 6
#2Anna Zieleniewska (FAU: University of Erlangen-Nuremberg)H-Index: 6
Last. Dirk M. Guldi (FAU: University of Erlangen-Nuremberg)H-Index: 113
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The synthesis of a series of new electron donor–bridge–acceptor (D–B–A) conjugates (18–20) comprising electron-donating zinc(II) porphyrins (ZnPs) and electron-accepting fullerenes (C60s) connected through various co-oligomer bridges containing both dibenzothiophene-S,S-dioxide and fluorene units is reported. Detailed investigations using cyclic voltammetry, absorption, fluorescence, and femto/nanosecond transient absorption spectroscopy in combination with quantum chemical calculations have ena...
12 CitationsSource
#1Tristan A. Reekie (ETH Zurich)H-Index: 16
#2Michael Sekita (FAU: University of Erlangen-Nuremberg)H-Index: 10
Last. François Diederich (ETH Zurich)H-Index: 108
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We report on a series of electron donor-acceptor conjugates incorporating a ZnII porphyrin-based electron donor and a variety of non-conjugated rigid linkers connecting to push-pull chromophores as electron acceptors. The electron acceptors comprize multicyanobutadienes or extended tetracyanoquinodimethane analogues with first reduction potentials ranging from -1.67 to -0.23 V vs. Fc+/Fc in CH2Cl2, which are accessible through a final-step cycloaddition-retroelectrocyclization (CA-RE) reaction. ...
14 CitationsSource