@article{HildebrandLaschewskyZehm2014,
  author    = {Hildebrand, Viet and Laschewsky, Andr{\´e} and Zehm, Daniel},
  title     = {On the hydrophilicity of polyzwitterion poly (N, N-dimethyl-N(3-(methacrylamido)propyl)ammoniopropane sulfonate) in water, deuterated water, and aqueous salt solutions},
  series = {Journal of biomaterials science : Polymer edition},
  volume    = {25},
  journal   = {Journal of biomaterials science : Polymer edition},
  number    = {14-15},
  publisher = {Routledge, Taylor \& Francis Group},
  address   = {Abingdon},
  issn      = {0920-5063},
  doi       = {10.1080/09205063.2014.939918},
  pages     = {1602 -- 1618},
  year      = {2014},
  language  = {en}
}
@article{ZehmLaschewskyHeunemannetal.2011,
  author    = {Zehm, Daniel and Laschewsky, Andr{\´e} and Heunemann, Peggy and Gradzielski, Michael and Prevost, Sylvain and Liang, Hua and Rabe, J{\"u}rgen P. and Lutz, Jean-Francois},
  title     = {Synthesis and self-assembly of amphiphilic semi-brush and dual brush block copolymers in solution and on surfaces},
  series = {Polymer Chemistry},
  volume    = {2},
  journal   = {Polymer Chemistry},
  number    = {1},
  publisher = {Royal Society of Chemistry},
  address   = {Cambridge},
  issn      = {1759-9954},
  doi       = {10.1039/c0py00200c},
  pages     = {137 -- 147},
  year      = {2011},
  abstract  = {The combination of two techniques of controlled free radical polymerization, namely the reversible addition fragmentation chain transfer (RAFT) and the atom transfer radical polymerization (ATRP) techniques, together with the use of a macromonomer allowed the synthesis of symmetrical triblock copolymers, designed as amphiphilic dual brushes. One type of brush was made of poly(n-butyl acrylate) as soft hydrophobic block, i.e. characterized by a low glass transition temperature, while the other one was made of hydrophilic poly(ethylene glycol) (PEG). The new triblock polymers represent "giant surfactants" according to their molecular architecture. The hydrophobic and hydrophilic blocks microphase separate in the bulk. In aqueous solution, they aggregate into globular micellar aggregates, their size being determined by the length of the stretched polymer molecules. As determined by the combination of various scattering techniques for the dual brush copolymer, a rather compact structure is formed, which is dominated by the large hydrophobic poly(n-butyl acrylate) block. The aggregation number for the dual brush is about 10 times larger than for the "semi-brush" precursor copolymer, due to the packing requirements for the much bulkier hydrophobic core. On mica surfaces the triblock copolymers adsorb with worm-like backbones and stretched out side chains.},
  language  = {en}
}
@article{SkrabaniaMiasnikovaBivigouKoumbaetal.2011,
  author    = {Skrabania, Katja and Miasnikova, Anna and Bivigou Koumba, Achille Mayelle and Zehm, Daniel and Laschewsky, Andr{\´e}},
  title     = {Examining the UV-vis absorption of RAFT chain transfer agents and their use for polymer analysis},
  series = {Polymer Chemistry},
  volume    = {2},
  journal   = {Polymer Chemistry},
  number    = {9},
  publisher = {Royal Society of Chemistry},
  address   = {Cambridge},
  issn      = {1759-9954},
  doi       = {10.1039/c1py00173f},
  pages     = {2074 -- 2083},
  year      = {2011},
  abstract  = {The absorption characteristics of a large set of thiocarbonyl based chain transfer agents (CTAs) were studied by UV-vis spectroscopy in order to identify appropriate conditions for exploiting their absorbance bands in end-group analysis of polymers prepared by reversible addition-fragmentation chain transfer (RAFT) polymerisation. Substitution pattern and solvent polarity were found to affect notably the wavelengths and intensities of the pi-pi*- and n-pi*-transition of the thiocarbonyl bond of dithioester and trithiocarbonate RAFT agents. Therefore, it is advisable to refer in end group analysis to the spectral parameters of low molar mass analogues of the active polymer chain ends, rather than to rely on the specific RAFT agent engaged in the polymerisation. When using appropriate conditions, the quantification of the thiocarbonyl end-groups via the pi-pi* band of the thiocarbonyl moiety around 300-310 nm allows a facile, sensitive and surprisingly precise estimation of the number average molar mass of the polymers produced, without the need of particular end group labels. Moreover, when additional methods for absolute molar mass determination can be applied, the quantification of the thiocarbonyl end-groups by UV-spectroscopy provides a good estimate of the degree of active end group for a given polymer sample.},
  language  = {en}
}
@article{ZehmLaschewskyLiangetal.2011,
  author    = {Zehm, Daniel and Laschewsky, Andr{\´e} and Liang, Hua and Rabe, J{\"u}rgen P.},
  title     = {Straightforward access to amphiphilic dual bottle brushes by combining RAFT, ATRP, and NMP polymerization in one sequence},
  series = {Macromolecules : a publication of the American Chemical Society},
  volume    = {44},
  journal   = {Macromolecules : a publication of the American Chemical Society},
  number    = {24},
  publisher = {American Chemical Society},
  address   = {Washington},
  issn      = {0024-9297},
  doi       = {10.1021/ma2015613},
  pages     = {9635 -- 9641},
  year      = {2011},
  abstract  = {Molecular brush diblock copolymers were synthesized by the orthogonal overlay of the RAFT (reversible addition-fragmentation chain transfer), the ATRP (atom transfer radical polymerization), and the NMP (nitroxide-mediated polymerization) techniques. This unique combination enabled the synthesis of the complex amphiphilic polymers without the need of postpolymerization modifications, using a diblock copolymer intermediate made from two selectively addressable inimers and applying a sequence of four controlled free radical polymerization steps in total. The resulting polymers are composed of a thermosensitive poly(N-isopropylacrylamide) brush as hydrophilic block and a polystyrene brush as hydrophobic block, thus translating the structure of the established amphiphilic diblock copolymers known as macro surfactants to the higher size level of "giant surfactants". The dual molecular brushes and the aggregates formed on ultra flat solid substrates were visualized by scanning force microscopy (SFM).},
  language  = {en}
}
@inproceedings{LaschewskyLiangRabeetal.2012,
  author    = {Laschewsky, Andr{\´e} and Liang, Hua and Rabe, J{\"u}rgen P. and Skrabania, Katja and Stahlhut, Frank and Weiss, Jan and Zehm, Daniel},
  title     = {Molecularly designed polymer colloids From giant surfactants to multicompartment micelles},
  series = {Abstracts of papers : joint conference / The Chemical Institute of Cananda, CIC, American Chemical Society, ACS},
  volume    = {244},
  booktitle = {Abstracts of papers : joint conference / The Chemical Institute of Cananda, CIC, American Chemical Society, ACS},
  number    = {32},
  publisher = {American Chemical Society},
  address   = {Washington},
  issn      = {0065-7727},
  pages     = {1},
  year      = {2012},
  language  = {en}
}
@article{ZehmLaschewskyGradzielskietal.2010,
  author    = {Zehm, Daniel and Laschewsky, Andr{\´e} and Gradzielski, Michael and Pr{\´e}vost, Sylvain and Liang, Hua and Rabe, J{\"u}rgen P. and Schweins, Ralf and Gummel, J{\´e}r{\´e}mie},
  title     = {Amphiphilic dual brush block copolymers as "giant surfactants" and their aqueous self-assembly},
  issn      = {0743-7463},
  doi       = {10.1021/La903087p},
  year      = {2010},
  abstract  = {Amphiphilic dual brush diblock as well as symmetrical triblock polymers were synthesized by the overlay of the reversible addition-fragmentation chain transfer and the nitroxide mediated polymerization (NMP) techniques. While poly(ethylene glycol) brushes served as hydrophilic block, the hydrophobic block was made of polystyrene brushes. The resulting "giant surfactants" correspond structurally to the established amphiphilic diblock and triblock copolymer known as macrosurfactants. The aggregation behavior of the novel "giant surfactants" in aqueous solution was studied by dynamic light scattering, small-angle neutron scattering (SANS), and small-angle X-ray scattering (SAXS) over a large range in reciprocal space. Further, the self-assembled aggregates Were investigated by scanning force microscopy (SFM) after deposition on differently functionalized ultraflat solid substrates. Despite the high fraction of hydrophobic segments, the polymers form stable mesoscopic, spherical aggregates with hydrodynamic diameters in the range of 150-350 nm. Though prepared from well-defined individual polymers, the aggregates show several similarities to hard core latexes. They are stable enough to he deposited without much changes onto surfaces, where they cluster and show Spontaneous sorting according to their size within the clusters, with the larger aggregates being in the center.},
  language  = {en}
}
@phdthesis{Zehm2010,
  author    = {Zehm, Daniel},
  title     = {Amphiphile Block-B{\"u}rstenpolymere : ihre Synthese durch sequentielle Anwendung von CRP-Methoden und ihre Selbstorganisation in ausgew{\"a}hlten L{\"o}sungsmitteln},
  address   = {Potsdam},
  pages     = {XI, 166 S. : graph. Darst.},
  year      = {2010},
  language  = {de}
}
@article{ZehmFudickarHansetal.2008,
  author    = {Zehm, Daniel and Fudickar, Werner and Hans, Melanie and Schilde, Uwe and Kelling, Alexandra and Linker, Torsten},
  title     = {9,10-Diarylanthracenes as molecular switches : syntheses, properties, isomerisations and their reactions with singlet oxygen},
  issn      = {0947-6539},
  year      = {2008},
  abstract  = {A series of 9,10-diarylanthracenes with various substituents at the ortho positions have been synthesised by palladium-catalysed cross-coupling reactions. Such compounds exhibit interesting physical properties and can be applied as molecular switches. Despite the high steric demand of the substituents, products were formed in moderate-to-good yields. In some cases, microwave conditions further improved yields. Bis-coupling afforded two isomers (syn and anti) that do not interconvert at room temperature. These products were easily separated and their relative stereochemistries were unequivocally assigned by NMR spectroscopy and X-ray analysis. The syn and anti isomers exhibit different physical properties (e.g., melting points and solubilities) and interconversion by rotation around the aryl-aryl axis commences at <100 °C for fluoro-substituted diarylanthracenes and at >300 °C for alkyl- or alkoxy-substituted diarylanthracenes. The reactions with singlet oxygen were studied separately and revealed different reactivities and reaction pathways. The yields and reactivities depend on the size and electronic nature of the substituents. The anti isomers form the same 9,10-endoperoxides as the syn species, occasionally accompanied by unexpected 1,4-endoperoxides as byproducts. Thermolysis of the endoperoxides exclusively yielded the syn isomers. The interesting rotation around the aryl-aryl axis allows the application of 9,10-diarylanthracenes as molecular switches, which are triggered by light and air under mild conditions. Finally, the oxygenation and thermolysis sequence provides a simple, synthetic access to a single stereoisomer (syn) from an unselective coupling step.},
  language  = {en}
}