Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Andreas Wohlfarth"'
Autor:
Jan-Patrick Melchior, Andreas Wohlfarth, Thomas Bräuniger, Klaus-Dieter Kreuer, Giuseppe Portale
Publikováno v:
Macromolecules. 48:8534-8545
Interactions controlling the viscoelastic properties of Nafion are identified by investigating morphological changes induced through stretching at a wide range of controlled temperature and relative humidity. 2H-goniometer NMR exploiting the pseudone
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cef3b7a83ea311c71d273a0c529e0ee8
https://doi.org/10.1021/acs.macromol.5b01559
https://doi.org/10.1021/acs.macromol.5b01559
Autor:
Jens Smiatek, Andreas Wohlfarth, Patric Jannasch, Shogo Takamuku, Klaus-Dieter Kreuer, Joachim Maier
Publikováno v:
Macromolecules. 48:1134-1143
The counterion condensation behavior of proton conducting sulfonated polysulfones has been investigated by combining electrophoretic NMR, pulsed magnetic field gradient NMR, and conductivity measurements on monomeric and polymeric samples with concen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f57fafbd9b45605dcc71b2ebfd7ed8d6
https://doi.org/10.1021/ma502550f
https://doi.org/10.1021/ma502550f
Publikováno v:
Polymer Chemistry. 6:1267-1274
Specially tailored polyelectrolytes are becoming important as energy-related materials. Here we explore a synthetic strategy to prepare fully aromatic polymers containing single phenylene rings in the backbone functionalized with four sulfonic acid g
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c2a86bda05b45a031953f5afcde0e25f
https://doi.org/10.1039/c4py01177e
https://doi.org/10.1039/c4py01177e
Publikováno v:
Journal of Membrane Science. 464:61-71
Transport of water and anions (OH−, HCO3−, F−, Cl−, Br−, and I−) in a model poly(arylene ether) anion exchange membrane (AEM) with quaternary ammonium (QA) functional groups is studied for water volume fractions of Φwater=5–99.9%. At e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9fcbb100d897f8fea3b336b627616fe7
https://doi.org/10.1016/j.memsci.2014.04.003
https://doi.org/10.1016/j.memsci.2014.04.003
Publikováno v:
Fuel Cells. 14:325-331
Multi-block copolymers with sulfonated polysulfones as hydrophilic blocks and polyethersulfones as hydrophobic blocks have been modified by two methods: covalent and ionic crosslinking. Both methods can easily be integrated into a membrane casting pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::28f6c15256b5f1aca06c4b217501f390
https://doi.org/10.1002/fuce.201300261
https://doi.org/10.1002/fuce.201300261
Publikováno v:
Chemistry - A European Journal. 17:13814-13824
Here we present a general and common catalytic asymmetric strategy for the total and formal synthesis of a broad number of optically active natural products from the corynantheine and ipecac alkaloid families, for example, indolo[2,3-a]- and benzo[a]
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cd0d45c21e1a2365fd09e0bcc4f26d67
https://doi.org/10.1002/chem.201102012
https://doi.org/10.1002/chem.201102012
Autor:
Matthias Buerger, Michael Schuster, Klaus-Dieter Kreuer, Vladimir Atanasov, Andreas Wohlfarth, Joachim Maier
Publikováno v:
Polymer Bulletin. 68:317-326
The preparation of highly sulfonated poly(phenylene sulfone) (ion exchange capacity = 4.45 meq g−1) by polycondensation of sulfonated difluorodiphenyl sulfone with metal sulfide and subsequent oxidation with hydrogen peroxide is optimized. The mono
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::46a83a263b85db3bcf8e2cc8edf496df
https://doi.org/10.1007/s00289-011-0539-3
https://doi.org/10.1007/s00289-011-0539-3
Publikováno v:
Zeitschrift für Naturforschung B. 65:1416-1426
Several new alkali metal oxometallates with anions built up from tetrahedral [MO4] units were obtained in reactions aimed at the formation of alkali metal suboxometallates or by thermally decomposing the latter. Rubidium orthoaluminate tetrahydroxide
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7bbc59fe6b34b786e69dadd6b8308b41
https://doi.org/10.1515/znb-2010-1202
https://doi.org/10.1515/znb-2010-1202
Publikováno v:
Zeitschrift für anorganische und allgemeine Chemie. 635:1777-1782
Single crystals of the suboxometallates A9MO4 (A = Rb, Cs;M = Al, Ga, Fe, Sc) were prepared by reaction of stoichiometric mixtures of M2O3 with alkali metals and their oxides A2O. They crystallize in the tetragonal Cs9InO4 structure type (space group
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c8cbac3902b74346661decd8673f5728
https://doi.org/10.1002/zaac.200900193
https://doi.org/10.1002/zaac.200900193
Autor:
Klaus-Dieter Kreuer, Andreas Wohlfarth
Publikováno v:
Angewandte Chemie. 124:10604-10606
Parasitic current seems to be the cause for the "highest proton conductivity" of a material reported to date. Kreuer and Wohlfarth verify this hypothesis by measuring the conductivity of the same materials after preparing them in a different way. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1712ad34354e86810ef1ab079fa2072c
https://doi.org/10.1002/ange.201203887
https://doi.org/10.1002/ange.201203887