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Holger Frauenrath

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Publications associées (53)

Optical gap and fundamental gap of oligoynes and carbyne

Jan Cornelius Brauer, Laurent Alexis Clément Vannay, Anne-Clémence Corminboeuf, Holger Frauenrath, Stephen Schrettl, Emmanuel Romaric Contal, Eric Albert Georges Bremond

The optoelectronic properties of various carbon allotropes and nanomaterials have been well established, while the purely sp-hybridized carbyne remains synthetically inaccessible. Its properties have therefore frequently been extrapolated from those of def ...

Nature Research2020

Engineering polymers with improved charge transport properties from bithiophene-containing polyamides

John Christopher Plummer, Rosario Scopelliti, Holger Frauenrath, Farzaneh Fadaei Tirani, Bilal Özen, Nicolas Candau

Polymer semiconductors show unique combinations of mechanical and optoelectronic properties that strongly depend on their microstructure and morphology. Here, we have used a model pi-conjugated bithiophene repeat unit to incorporate optoelectronic function ...

Royal Society of Chemistry2020

Crystallization and Organic Field-Effect Transistor Performance of a Hydrogen-Bonded Quaterthiophene

Philippe Bugnon, Rosario Scopelliti, Stéphane Suarez, Anne-Clémence Corminboeuf, Holger Frauenrath, Jan Gebers, Riccardo Petraglia, Piotr De Silva, Bilal Özen

Crystalline thin films of pi-conjugated molecules are relevant as the active layers in organic electronic devices. Therefore, materials with enhanced control over the supramolecular arrangement, crystallinity, and thin-film morphology are desirable. Herein ...

2020

Hexayne Amphiphiles and Bolaamphiphiles

Rosario Scopelliti, Holger Frauenrath, Enzo Jean Raymond Bomal, Vincent Matthieu Guillaume Croué, Reuben Yeo Jueyuan

Oligoynes with two or more conjugated carbon-carbon triple bonds are useful precursors for carbon-rich nanomaterials. However, their range of app0lications has so far been severly limited by the challenging syntheses, particularly in the case of oligoynes ...

2020

Long‐Lived Photocharges in Supramoelcular Polymers of Low‐Bandgap Chromophores

Andrzej Sienkiewicz, Holger Frauenrath, Regina Judith Hafner, Daniel Görl

Photoinduced charge separation in supramolecular aggregates of π‐conjugated molecules is a fundamental photophysical process, and a key criterion for the development of advanced organic electronics materials. Here, we report on the self‐assembly of novel l ...

2020

Composition and method for the preparation of sheets, films, fibers, and molded parts

Holger Frauenrath, Daniel Görl, Oguzhan Oguz

The invention describes a composition containing a) a functionalized polymer (10) that comprises at least one polyester segment (13) and at least one, in particular at least two, polymer aggregating segment (11, 12) capable of forming non-covalent bonds ba ...

2020

Composition containing a polymer and an additive

John Christopher Plummer, Holger Frauenrath, Daniel Görl

The invention describes a composition containing a) a functionalized polymer (10) that comprises at least one polymer segment (13) and at least two polymer aggregating segments (11,12) capable of forming non-covalent bonds based on a supramolecular interac ...

2019

Unusually Long-Lived Photocharges in Helical Organic Semiconductor Nanostructures

Andrzej Sienkiewicz, Jürgen Brugger, Jan Cornelius Brauer, Valentin Flauraud, Holger Frauenrath, Liangfei Tian, Regina Judith Hafner, Thomas Schmaltz

Photocharge generation and formation of long-lived charge carriers are relevant in photosynthesis, photocatalysis, photovoltaics, and organic electronics. A better understanding of the factors that determine these processes in synthetic polymer semiconduct ...

AMER CHEMICAL SOC2018

Polyamide material

John Christopher Plummer, Holger Frauenrath, Sylvain Cyril Claude Galland, Nicolas Candau

The invention relates to a polyamide material containing a polyamide as the matrix polyamide and fibrillar polyamide particles, wherein at least 10 vol.% of the fibrillar polyamide particles, based on the total volume of the fibrillar polyamide particles, ...

2018

High-temperature copolyamides obtained by the efficient transamidation of crystalline-crystalline polyamide blends

John Christopher Plummer, Véronique Michaud, Holger Frauenrath, Sylvain Cyril Claude Galland

High-performance thermoplastic composites based on semiaromatic polyamides are prime candidates for metal replacement in lightweight structural applications. However, the low ductility and toughness of semiaromatic polyamides remain major obstacles to thei ...

Wiley-Blackwell2017

Method for the preparation of a coating comprising oligomeric alkynes

Yves Leterrier, Holger Frauenrath, Stephen Schrettl, Bjoern Schulte

The invention relates to a method for the preparation of a coating comprising at least one coating layer on a substrate, the method comprising the steps of a. providing monomers of the type R- (N)x-(L)m- (C=C)n-(L')o- (N')y-R', wherein R is a head moiety, ...

2017

Synthesis and Characterisation of Semiaromatic Polyamides Comprising Benzofurobenzofuran Repeating Units

Rosario Scopelliti, Anne-Clémence Corminboeuf, Julien Philippe Cretenoud, Holger Frauenrath, Alberto Fabrizio, Farzaneh Fadaei Tirani, Bilal Özen, Thomas Schmaltz, Daniel Görl

Semiaromatic polyamides are attractive engineering polymers owing to their outstanding thermo-mechanical properties. To expand the scope of semiaromatic polyamides by additional optoelectronic features, one may consider the incorporation of extended pi-con ...

2017

Method for the preparation of a coating

Yves Leterrier, Holger Frauenrath, Stephen Schrettl, Bjoern Schulte

The invention relates to a method for the preparation of a coating comprising at least one coating layer on a solid substrate, said method comprising the steps of a, providing monomers of the type R-(N)x-(L)m-(C≡C)n-(L']o(N')y-R', wherein R is a head moiet ...

2016

Facile synthesis of oligoyne amphiphiles and their rotaxanes

Holger Frauenrath, Stephen Schrettl, Tobias Hoheisel, Ruth Szilluweit, Martin Fritzsche, Emmanuel Romaric Contal

Carbon-rich organic compounds containing a series of conjugated triple bonds (oligoynes) are relevant synthetic targets, but an improved access to oligoynes bearing functional groups would be desirable. Here, we report the straightforward synthesis of two ...

Royal Soc Chemistry2015

Soft-landing electrospray ion beam deposition of sensitive oligoynes on surfaces in vacuum

Klaus Kern, Stephan Rauschenbach, Holger Frauenrath, Stephen Schrettl, Tobias Hoheisel, Gordon Rinke

Characterizing the complex structure of such molecules with highly resolving, vacuum-based methods like scanning probe microscopy requires their transfer into the gas phase and further onto an atomically clean surface in ultrahigh vacuum without causing ad ...

Elsevier2015

Solubility and Crystallizability: Facile Access to Functionalized pi-Conjugated Compounds with Chlorendylimide Protecting Groups

Rosario Scopelliti, Stéphane Suarez, Jan Cornelius Brauer, Holger Frauenrath, Damien Rolland, Roman Niklaus Marty, Jan Gebers, Luca Cervini

Functional pi-conjugated molecules are relevant for the preparation of new organic electronic materials with improved performance. However, their synthesis is often rendered difficult by their inherently low solubility, and the permanent attachment of solu ...

Wiley-V C H Verlag Gmbh2015

Two-Fold Odd-Even Effect in Self-Assembled Nanowires from Oligopeptide-Polymer-Substituted Perylene Bisimides

Deborah Leite, Holger Frauenrath, Roman Niklaus Marty, Robin Nigon

Organic nanowires are important building blocks for nanoscopic organic electronic devices. In order to ensure efficient charge transport through such nanowires, it is important to understand in detail the molecular parameters that guide self-assembly of pi ...

Amer Chemical Soc2014

Blends of oligopeptide terminal polyisobutylene or polystyrene

Véronique Michaud, Emmanuel Croisier, Holger Frauenrath, Su Liang

Various blends of polymers are disclosed, comprising oligopeptide functionalised polymers such as polyisobutylene and polystyrene. Mono-functionalised and di-functionalised polymers (each containing 0 to 5 peptide units beyond its terminal amide group) may ...

2014

Functional carbon nanosheets prepared from hexayne amphiphile monolayers at room temperature

Guillaume Pasche, Yannik Fontana, Anne-Clémence Corminboeuf, Anna Fontcuberta i Morral, Holger Frauenrath, Emad Oveisi, Stephen Schrettl, Javier Reguera Gomez, Riccardo Petraglia

Carbon nanostructures that feature two-dimensional extended nanosheets are important components for technological applications such as high-performance composites, lithium-ion storage, photovoltaics and nanoelectronics. Chemical functionalization would ren ...

Nature Publishing Group2014

Aggregates from Perylene Bisimide Oligopeptides as a Test Case for Giant Vibrational Circular Dichroism

Holger Frauenrath, Roman Niklaus Marty

Vibrational circular dichroism (VCD) spectroscopy has become an excellent tool to study biological nanostructures and biomimetic materials in their functional environment and is thus complementary to otherwise employed diffraction, imaging, and spectroscop ...

Amer Chemical Soc2014

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