Gross, Martha M.; Manthiram, Arumugam
Aqueous Polysulfide–Air Battery with a Mediator-Ion Solid Electrolyte and a Copper Sulfide Catalyst for Polysulfide Redox
Aqueous sodium polysulfide–air batteries are a promising system for enabling low-cost, high energy density, environmentally benign batteries for grid-scale deployment. However, the sluggish redox kinetics of aqueous polysulfide requires the use of a catalyst. Cobalt sulfide is a traditional catalyst with good activity and stability, but it uses expensive and…
Rapid and Quantitative De-tert-butylation for Poly(acrylic acid) Block Copolymers and Influence on Relaxation of Thermoassociated Transient Networks
Filippov, Alexei D.; van Hees, Ilse A.; Fokkink, Remco; Voets, Ilja K.; Kamperman, Marleen
The synthesis of charged polymers often requires the polymerization of protected monomers, followed by a polymer-analogous reaction to the polyelectrolyte product. We present a mild, facile method to cleave tert-butyl groups from poly(tert-butyl acrylate) blocks that yields poly(acrylic acid) (pAA) blocks free of traces of the ester. The reaction utilizes…
Guided Assembly of Block Copolymers in Three-Dimensional Woodpile Scaffolds
Choi, Jaewon; Koo, Sangmo; Sakellari, Ioanna; Kim, Hyeyoung; Su, Zhengliang; Carter, Kenneth R.; Farsari, Maria; Grigoropoulos, Costas P.; Russell, Thomas P.
Three-dimensional (3D) nanofabrication using the directed self-assembly of block copolymers (BCPs) holds great promise for the nanoscale device fabrication and integration into 3D architectures over large areas with high element densities. In this work, a robust platform is developed for building 3D BCP architectures with tailored functionality using 3D micron-scale…
Size-Selective Adsorption in Nanoporous Polymers from Coumarin Photo-Cross-Linked Columnar Liquid Crystals
Concellón, Alberto; Schenning, Albertus P. H. J.; Romero, Pilar; Marcos, Mercedes; Serrano, José Luis
We have prepared nanoporous polymers from columnar hexagonal hydrogen-bonded complexes, whose order is fixed by coumarin photoinduced cycloaddition (photodimerization). Two different hydrogen-bonded complexes were used and consisted of a melamine (M) or tris(triazolyl)triazine (T) derivative acting as central templates and three peripheral carboxylic acids containing coumarin units. These…
Thermomechanical and Conductive Properties of Thiol–Ene Poly(ionic liquid) Networks Containing Backbone and Pendant Imidazolium Groups
Bratton, Abigail F.; Kim, Sung-Soo; Ellison, Christopher J.; Miller, Kevin M.
A series of covalently cross-linked poly(ionic liquid) networks were prepared using thiol–ene “click” photopolymerization. In these networks, imidazolium groups are placed in the backbone and pendant to the main chain, creating a “hybrid”-type network architecture. The pendant imidazolium groups were incorporated into the networks from monofunctional “ene” monomers that contained…
Effects of Urea and TMAO on Lipid Self-Assembly under Osmotic Stress Conditions
Pham, Quoc Dat; Wolde-Kidan, Amanuel; Gupta, Anirudh; Schlaich, Alexander; Schneck, Emanuel; Netz, Roland R.; Sparr, Emma
Most land-living organisms regularly experience dehydration. In nature, one commonly applied strategy to protect against this osmotic stress is to introduce small polar molecules with low vapor pressure, commonly called osmolytes. Two examples of naturally occurring small polar compounds are urea and trimethylamine N-oxide (TMAO), which are known to have…
Effects of fluorination and thermal annealing on charge recombination processes in polymer bulk-heterojunction solar cells
Más-Montoya, Miriam; Li, Junyu; Wienk, Martijn M.; Meskers, Stefan CJ; Janssen, René AJ
Journal of Materials Chemistry A, 2018, vol 6, 40, pp. 19520–19531DOI:Back to the overview
The Impact of Device Polarity on the Performance of Polymer–Fullerene Solar Cells
Li, Mengmeng; Li, Junyu; Di Carlo Rasi, Dario; Colberts, Fallon JM; Wang, Junke; Heintges, Gaël HL; Lin, Baojun; Li, Weiwei; Ma, Wei; Wienk, Martijn M.
Advanced Energy Materials, 2018, pp. 1800550DOI:Back to the overview
An Isoindigo-Based “Double-Cable” Conjugated Polymer for Single-Component Polymer Solar Cells
Yu, Changshi; Xu, Yunhua; Li, Cheng; Feng, Guitao; Yang, Fan; Li, Junyu; Li, Weiwei
Chinese Journal of Chemistry, 2018, vol 36, 6, pp. 515–518DOI:Back to the overview
The effect of side-chain substitution on the aggregation and photovoltaic performance of diketopyrrolopyrrole-alt-dicarboxylic ester bithiophene polymers
Heuvel, Ruurd; Colberts, Fallon J. M.; Li, Junyu; Wienk, Martijn M.; Janssen, René A. J.
Using a dicarboxylic ester bithiophene (DCBT) co-monomer, electron-withdrawing ester groups are introduced on the two central thiophene rings of an alternating donor–acceptor polymer (PDPP4T) consisting of diketopyrrolopyrrole (DPP) and quaterthiophene (4T) to increase the oxidation potential and reduce the photon energy loss in solar cells. To counteract the increased solubility…