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11 Submissions in this community.

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Synthesis, characterization and catalytic testing of metal tungstates as catalysts for activation of lower alkanes

Li, Xuan (2017)

The electronic and structural properties of vanadium-containing phases govern the formation of isolated active sites at the surface of these catalysts for selective alkane oxidation. This concept i...

Processing, structuring, and switching of microporous polymers

Becker, Daniel (2017)

This work presents results from three different topics that stand independent from each other. If one wants to find a common denominator connecting all these topics it might be porosity. Whereas th...

Tunable absorption and emission wavelength in conjugated microporous polymers by copolymerization

Brandt, Jessica; Schmidt, Johannes; Thomas, Arne; Epping, Jan Dirk; Weber, Jens (2011)

Conjugated, microporous polymers based on a spirobifluorene core were synthesized by Suzuki polycondensation of the tetrabromospirobifluorene with benzene diboronic acid and/or thiophene diboronic ...

Synthesis of mesoporous composite materials of nitrogen-doped carbon and silica using a reactive surfactant approach

Paraknowitsch, Jens Peter; Zhang, Yuanjian; Thomas, Arne (2011)

Mesoporous composite materials of nitrogen-doped carbon and silica were synthesised in a one-step-process applying a soft templating procedure. The template used in the sol–gel synthesis of the sil...

Microporous sulfur-doped carbon from thienyl-based polymer network precursors

Paraknowitsch, Jens Peter; Thomas, Arne; Schmidt, Johannes (2011)

Porous sulfur-doped carbon was synthesised by using a thienyl-based polymer network as a precursor. The sulfur amount varies from 5–23 m% while the materials show microporosity with BET surface are...

Nitrogen- and phosphorus-co-doped carbons with tunable enhanced surface areas promoted by the doping additives

Paraknowitsch, Jens Peter; Zhang, Yuanjian; Wienert, Björn; Thomas, Arne (2013)

1-Butyl-3-methyl-pyridinium-dicyanamide (BMP-dca) is carbonised with tetra-alkyl-phosphonium-bromide additives yielding nitrogen- and phosphorus-co-doped carbons with enhanced BET surface areas pro...

A polymer analogous reaction for the formation of imidazolium and NHC based porous polymer networks

Thiel, Kerstin; Zehbe, Rolf; Roeser, Jerômé; Strauch, Peter; Enthaler, Stephan; Thomas, Arne (2013)

A polymer analogous reaction was carried out to generate a porous polymeric network with N-heterocyclic carbenes (NHC) in the polymer backbone. Using a stepwise approach, first a polyimine network ...

Doping carbons beyond nitrogen: an overview of advanced heteroatom doped carbons with boron, sulphur and phosphorus for energy applications

Paraknowitsch, Jens Peter; Thomas, Arne (2013)

Heteroatom doped carbon materials represent one of the most prominent families of materials that are used in energy related applications, such as fuel cells, batteries, hydrogen storage or supercap...

Geomimetics for green polymer synthesis: highly ordered polyimides via hydrothermal techniques

Baumgartner, Bettina; Bojdys, Michael J.; Unterlass, Miriam M. (2014)

Inspired by geological ore formation processes, we apply one-step hydrothermal (HT) polymerization to the toughest existing high-performance polymer, poly(p-phenyl pyromellitimide) (PPPI). We obtai...

Network formation mechanisms in conjugated microporous polymers

Laybourn, Andrea; Dawson, Robert; Clowes, Rob; Hasell, Tom; Cooper, Andrew I.; Khimyak, Yaroslav Z.; Adams, Dave J. (2014)

We discuss in detail the mechanism of formation of a highly microporous polymer, CMP-1, formed mainly via Sonogashira–Hagihara coupling. We demonstrate how the microporosity evolves with time, and ...

Cationic microporous polymer networks by polymerisation of weakly coordinating cations with CO2-storage ability

Fischer, Sabrina; Schimanowitz, Aneta; Dawson, Robert; Senkovska, Irena; Kaskel, Stefan; Thomas, Arne (2014)

Microporous organic polymer networks with weakly coordinating cations in their backbone have been synthesised by metal catalysed C–C bond forming reactions. A functionalised tetraphenylphosphonium ...