@article{WeisHessKircheretal.2019,
  author    = {Weis, Philipp and Hess, Andreas and Kircher, Gunnar and Huang, Shilin and Auernhammer, G{\"u}nter K. and Koynov, Kaloian and Butt, Hans-J{\"u}rgen and Wu, Si},
  title     = {Effects of Spacers on Photoinduced Reversible Solid-to-Liquid Transitions of Azobenzene-Containing Polymers},
  series = {Chemistry - a European journal},
  volume    = {25},
  journal   = {Chemistry - a European journal},
  number    = {46},
  publisher = {Wiley-VCH},
  address   = {Weinheim},
  issn      = {0947-6539},
  doi       = {10.1002/chem.201902273},
  pages     = {10946 -- 10953},
  year      = {2019},
  abstract  = {Photoisomerization in some azobenzene-containing polymers (azopolymers) results in reversible solid-to-liquid transitions because trans- and cis-azopolymers have different glass transition temperatures. This property enables photoinduced healing and processing of azopolymers with high spatiotemporal resolution. However, a general lack of knowledge about the influence of the polymer structure on photoinduced reversible solid-to-liquid transitions hinders the design of such novel polymers. Herein, the synthesis and photoresponsive behavior of new azopolymers with different lengths of spacers between the polymer backbone and the azobenzene group on the side chain are reported. Azopolymers with no and 20 methylene spacers did not show photoinduced solid-to-liquid transitions. Azopolymers with 6 or 12 methylene spacers showed photoinduced solid-to-liquid transitions. This study demonstrates that spacers are essential for azopolymers with photoinduced reversible solid-to-liquid transitions, and thus, gives an insight into how to design azopolymers for photoinduced healing and processing.},
  language  = {en}
}
@article{MuellerFoerstendorfSteudtneretal.2019,
  author    = {M{\"u}ller, Katharina and Foerstendorf, Harald and Steudtner, Robin and Tsushima, Satoru and Kumke, Michael Uwe and Lef{\`e}vre, Gr{\´e}gory and Rothe, J{\"o}rg and Mason, Harris and Szab{\´o}, Zolt{\´a}n and Yang, Ping and Adam, Christian K. R. and Andr{\´e}, R{\´e}mi and Brennenstuhl, Katlen and Chiorescu, Ion and Cho, Herman M. and Creff, Ga{\"e}lle and Coppin, Fr{\´e}d{\´e}ric and Dardenne, Kathy and Den Auwer, Christophe and Drobot, Bj{\"o}rn and Eidner, Sascha and Hess, Nancy J. and Kaden, Peter and Kremleva, Alena and Kretzschmar, Jerome and Kr{\"u}ger, Sven and Platts, James A. and Panak, Petra and Polly, Robert and Powell, Brian A. and Rabung, Thomas and Redon, Roland and Reiller, Pascal E. and R{\"o}sch, Notker and Rossberg, Andr{\´e} and Scheinost, Andreas C. and Schimmelpfennig, Bernd and Schreckenbach, Georg and Skerencak-Frech, Andrej and Sladkov, Vladimir and Solari, Pier Lorenzo and Wang, Zheming and Washton, Nancy M. and Zhang, Xiaobin},
  title     = {Interdisciplinary Round-Robin Test on molecular spectroscopy of the U(VI) Acetate System},
  series = {ACS omega / American Chemical Society},
  volume    = {4},
  journal   = {ACS omega / American Chemical Society},
  number    = {5},
  publisher = {American Chemical Society},
  address   = {Washington},
  issn      = {2470-1343},
  doi       = {10.1021/acsomega.9b00164},
  pages     = {8167 -- 8177},
  year      = {2019},
  abstract  = {A comprehensive molecular analysis of a simple aqueous complexing system. U(VI) acetate. selected to be independently investigated by various spectroscopic (vibrational, luminescence, X-ray absorption, and nuclear magnetic resonance spectroscopy) and quantum chemical methods was achieved by an international round-robin test (RRT). Twenty laboratories from six different countries with a focus on actinide or geochemical research participated and contributed to this scientific endeavor. The outcomes of this RRT were considered on two levels of complexity: first, within each technical discipline, conformities as well as discrepancies of the results and their sources were evaluated. The raw data from the different experimental approaches were found to be generally consistent. In particular, for complex setups such as accelerator-based X-ray absorption spectroscopy, the agreement between the raw data was high. By contrast, luminescence spectroscopic data turned out to be strongly related to the chosen acquisition parameters. Second, the potentials and limitations of coupling various spectroscopic and theoretical approaches for the comprehensive study of actinide molecular complexes were assessed. Previous spectroscopic data from the literature were revised and the benchmark data on the U(VI) acetate system provided an unambiguous molecular interpretation based on the correlation of spectroscopic and theoretical results. The multimethodologic approach and the conclusions drawn address not only important aspects of actinide spectroscopy but particularly general aspects of modern molecular analytical chemistry.},
  language  = {en}
}
@misc{RajuLiebigHessetal.2019,
  author    = {Raju, Rajarshi Roy and Liebig, Ferenc and Hess, Andreas and Schlaad, Helmut and Koetz, Joachim},
  title     = {Temperature-triggered reversible breakdown of polymer-stabilized olive},
  series = {Postprints der Universit{\"a}t Potsdam Mathematisch-Naturwissenschaftliche Reihe},
  journal   = {Postprints der Universit{\"a}t Potsdam Mathematisch-Naturwissenschaftliche Reihe},
  number    = {751},
  issn      = {1866-8372},
  doi       = {10.25932/publishup-43646},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-436461},
  pages     = {19271 -- 19277},
  year      = {2019},
  abstract  = {A one-step moderate energy vibrational emulsification method was successfully employed to produce thermo-responsive olive/silicone-based Janus emulsions stabilized by poly(N,N-diethylacrylamide) carrying 0.7 mol\% oleoyl side chains. Completely engulfed emulsion droplets remained stable at room temperature and could be destabilized on demand upon heating to the transition temperature of the polymeric stabilizer. Time-dependent light micrographs demonstrate the temperature-induced breakdown of the Janus droplets, which opens new aspects of application, for instance in biocatalysis.},
  language  = {en}
}
@article{BehrendtHessLehmannetal.2019,
  author    = {Behrendt, Felix Nicolas and Hess, Andreas and Lehmann, Max and Schmidt, Bernd and Schlaad, Helmut},
  title     = {Polymerization of cystine-derived monomers},
  series = {Polymer Chemistry},
  volume    = {10},
  journal   = {Polymer Chemistry},
  number    = {13},
  publisher = {Royal Society of Chemistry},
  address   = {Cambridge},
  issn      = {1759-9954},
  doi       = {10.1039/c9py00118b},
  pages     = {1636 -- 1641},
  year      = {2019},
  abstract  = {Cystine was used as a platform chemical to prepare cyclic and acyclic monomers for entropy-driven ringopening polymerization (ED-ROMP) via olefin or disulfide metathesis and for step-growth polymerization. The olefin ED-ROMP of an olefin/disulfide containing 16-atom macrocycle using the 3rd generation Grubbs catalyst was examined in greater detail. Kinetic studies revealed that the catalyst turned inactive during the polymerization, which limited the achievable (apparent) polymer molar mass to similar to 70 kg mol(-1). Such limitation could be overcome with the disulfide ED-ROMP of the same macrocycle to yield polymers with molar masses of up to 180 kg mol(-1). The step-growth polymerizations of acyclic diene and dithiol monomers via olefin metathesis or oxidation were far less effective and yielded just low molar mass polymers or oligomers; photopolymerization of a thiol-ene monomer produced a polyester with a molar mass of 35 kg mol(-1).},
  language  = {en}
}
@article{MaticHessSchanzenbachetal.2020,
  author    = {Matic, Aleksandar and Hess, Andreas and Schanzenbach, Dirk and Schlaad, Helmut},
  title     = {Epoxidized 1,4-polymyrcene},
  series = {Polymer chemistry},
  volume    = {11},
  journal   = {Polymer chemistry},
  number    = {7},
  publisher = {Royal Society of Chemistry},
  address   = {Cambridge},
  issn      = {1759-9954},
  doi       = {10.1039/c9py01783f},
  pages     = {1364 -- 1368},
  year      = {2020},
  abstract  = {1,4-Polymyrcene was synthesized by anionic polymerization and epoxidized using meta-chloroperbenzoic acid. Samples with different degrees of epoxidation (25\%, 49\%, 74\%, and 98\%) were prepared and examined according to their chemical and thermal properties. Epoxidation was found to increase the glass transition temperature (T-g = 14 degrees C for the 98\% epoxidized 1,4-polymyrcene) as well as the shelf live (>10 months). The trisubstituted epoxide groups were remarkably stable against nucleophiles under basic conditions but cross-linked or hydrolyzed in the presence of an acid. Also, highly epoxidized 1,4-polymyrcene readily cross-linked upon annealing at 260 degrees C to produce an epoxy resin.},
  language  = {en}
}
@article{HessSchmidtSchlaad2020,
  author    = {Hess, Andreas and Schmidt, Bernhard Volkmar Konrad Jakob and Schlaad, Helmut},
  title     = {Aminolysis induced functionalization of (RAFT) polymer-dithioester with thiols and disulfides},
  series = {Polymer Chemistry},
  volume    = {11},
  journal   = {Polymer Chemistry},
  number    = {48},
  publisher = {Royal Society of Chemistry},
  address   = {Cambridge},
  issn      = {1759-9954},
  doi       = {10.1039/d0py01365j},
  pages     = {7677 -- 7684},
  year      = {2020},
  abstract  = {A series of polystyrene- and poly(methyl methacrylate)-dithioesters was subjected to aminolysis under ambient atmospheric conditions, i.e., in the presence of oxygen. Polymer disulfide coupling by oxidation occurred within tens of minutes and the yield of disulfide-coupled polymer increased with decreasing polymer molar mass. Oxidation of thiolates is usually an unwanted side reaction, here it is employed to obtain exclusively polymeric mixed disulfides through in situ aminolysis/functionalization in the presence of a thiol. The in situ aminolysis/functionalization in the presence of a disulfide, Ellman's reagent or polymer disulfide, resulted in the exclusive formation of polymer-dithionitrobenzoic acid, which can be further reacted with a thiol to exchange the terminal functionality, or block copolymer with dynamic disulfide linker, respectively.},
  language  = {en}
}
@article{RajuLiebigHessetal.2019,
  author    = {Raju, Rajarshi Roy and Liebig, Ferenc and Hess, Andreas and Schlaad, Helmut and Koetz, Joachim},
  title     = {Temperature-triggered reversible breakdown of polymer-stabilized olive},
  series = {RSC Advances},
  volume    = {9},
  journal   = {RSC Advances},
  number    = {35},
  publisher = {RSC Publishing},
  address   = {London},
  issn      = {2046-2069},
  doi       = {10.1039/c9ra03463c},
  pages     = {19271 -- 19277},
  year      = {2019},
  abstract  = {A one-step moderate energy vibrational emulsification method was successfully employed to produce thermo-responsive olive/silicone-based Janus emulsions stabilized by poly(N,N-diethylacrylamide) carrying 0.7 mol\% oleoyl side chains. Completely engulfed emulsion droplets remained stable at room temperature and could be destabilized on demand upon heating to the transition temperature of the polymeric stabilizer. Time-dependent light micrographs demonstrate the temperature-induced breakdown of the Janus droplets, which opens new aspects of application, for instance in biocatalysis.},
  language  = {en}
}
@misc{AnlaufLayusFreweretal.2008,
  author    = {Anlauf, Lena and Layus, Rosario Figari and Frewer, Andreas and Furtmayr, Holger and Georgas, Margarita and Golovnenkov, Pavel and Heß, Asmus and Kintzel, Yvonne and Kotzur, Markus and Kr{\´a}sa, Kerstin and Menke, Christoph and Meyer, Gunda and Moewes, Udo and Reiß, Tim and Rothhaar, Markus and Weiß, Norman},
  title     = {MenschenRechtsMagazin : Informationen | Meinungen | Analysen},
  volume    = {13},
  number    = {2},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  issn      = {1434-2820},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-36208},
  year      = {2008},
  abstract  = {Themenschwerpunkt: Medizin und Menschenrechte - 60 Jahre Allgemeine Erkl{\"a}rung der Menschenrechte - Reflexionen zur Entstehungsgeschichte, Ideengeschichte und Wirkungsgeschichte - Zum Wohle des Vaterlands - Zur „Erkl{\"a}rung zu Menschenrechten und Menschenw{\"u}rde" des World Russian People´s Council - Bericht {\"u}ber die Arbeit des Menschenrechtsausschusses der Vereinten Nationen im Jahre 2007 - Teil II},
  language  = {de}
}
@phdthesis{Hess2021,
  author    = {Hess, Andreas},
  title     = {Synthese von funktionalisierbaren und abbaubaren Polymersystemen mit Disulfiden},
  school      = {Universit{\"a}t Potsdam},
  pages     = {v, 135},
  year      = {2021},
  abstract  = {Die vorliegende Arbeit besch{\"a}ftigt sich mit der Synthese von Disulfiden, der Thiol-Disulfid Metathesereaktion als M{\"o}glichkeit, Polymere zu funktionalisieren, und der Synthese von Polydisulfiden. Im ersten Teil der Arbeit wird die Aminolyse von RAFT-Polymeren und die Abh{\"a}ngigkeit der Polymer-Polymer Disulfidbildung von der Molmasse untersucht. Dabei wurde durch die Aufnahme von Reaktionskinetiken mittels Gel-Permeations-Chromatographie (GPC) festgestellt, dass je l{\"a}nger die Polymerketten sind, desto weniger Disulfid Polymerkopplung tritt auf. RAFT-Polymere werden oft genutzt, um die RAFT-Polymer Endgruppe nach der Polymerisation zu modifizieren oder in einer chemischen Reaktion zu funktionalisieren. Hier kann die Aminolyse in Anwesenheit von kurzkettigen Disulfiden, wie zum Beispiel Cystin, durchgef{\"u}hrt werden, um die Bildung von Polymer-Polymer Disulfiden vollst{\"a}ndig zu unterdr{\"u}cken und ein endgruppenfunktionalisiertes Polymer zu erhalten. Bei dieser Reaktion greift das bei der Aminolyse entstehende Polymerthiolat die kurzkettigen Disulfide an, und es kommt zur Bildung von funktionalisierten Polymeren. Es wurde ein Polyethylenglykoldisulfid eingesetzt, um ein amphiphiles Blockcopolymer zu erhalten. Als RAFT-Polymer wurde Polystyrol (PS) verwendet, und es konnte die Bildung von Polystyrol-Polyethylenglykol Copolymeren nachgewiesen werden. Das amphiphile Polymer bildet im w{\"a}ssrigen Medium Vesikel. Die Oberfl{\"a}che der Vesikel konnte mittels der Thiol-Disulfid Metathese umfunktionalisiert werden. Die Aminolyse von PS RAFT-Polymeren mit einem Polylaktiddisulfid oder einem Polybenzylglutamatdisulfid ergab Polystyrol-block-Polyester und Polystyrol-block-Polyaminos{\"a}uren Copolymere. Im zweiten Teil der Arbeit liegt der Fokus auf der Synthese von Polydisulfiden und ihren thermischen Eigenschaften. Es wurden verschiedene Alkyldithiole synthetisiert und mittels Wasserstoffperoxid und Triethylamin polymerisiert. Dabei konnte gezeigt werden, dass die Polymere teilkristallin sind und dass der Schmelzpunkt und die Kristallinit{\"a}t der Polymere mit steigender Alkylkettenl{\"a}nge zwischen den Disulfidbindungen zunehmen. Die M{\"o}glichkeit einer Polymerkettenerweiterung nach der Polymerisation ist mit diesem System gegeben. Die Abbaubarkeit der Polydisulfide konnte durch den Einsatz von Thiolen im basischen Milieu gezeigt werden.},
  language  = {de}
}