Publications
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Recent Publications
Valentina Pirela, Leire Unanue, Justine Elgoyhen, Javier Ramos, Juan Francisco Vega, Agurtzane Mugica, Manuela Zubitur, Cuong Minh Quoc Le, Abraham Chemtob, Radmila Tomovska, Günter Reiter, Jaime Martín, Alejandro J. Müller. European Polymer Journal (2025) 113721
This work studies how the chemical structure of relatively similar high-sulfur alternating polythioether homopolymers (DMDS-alt-DVE, DMDS-alt-TEGDVE, and DMDS-alt-BDDVE) affects their structural properties, morphology, polymorphism, and crystallization kinetics. Differential scanning calorimetry (DSC) and polarized light optical microscopy (PLOM) experiments revealed a complex crystallization for the samples in which up to three different polymorphic phases were identified: a very low melting crystal form (VL-Tm form), a low melting crystal form (L-Tm form) and a high melting crystal form (H-Tm form), characterized by their corresponding melting temperature ranges and confirmed via Wide-Angle X-ray Scattering (WAXS). A coexistence of negative and positive spherulites was found, and their origin was revealed by atomic force microscopy (AFM), which showed how the lamellar arrangement varied in the samples from predominantly radial to a cross-hatched morphology. (more...)
Gabriele Greco, Benjamin Schmuck, Fredrik G. Bäcklund, Günter Reiter and Anna Rising. ACS Appl. Polym. Mater. 6 (2024) 14342–14350
Recent biotechnological advancements in protein production and development of biomimetic spinning procedures make artificial spider silk a promising alternative to petroleum-based fibers. To enhance the competitiveness of artificial silk in terms of mechanical properties, refining the spinning techniques is imperative. One potential strategy involves the integration of post-spin stretching, known to improve fiber strength and stiffness while potentially offering additional advantages. Here, we demonstrate that post-spin stretching not only enhances the mechanical properties of artificial silk fibers but also restores a higher and more uniform alignment of the protein chains, leading to a higher fiber toughness. (more...)
Raphael Hertel, Maximilian Raisch, Michael Walter, Günter Reiter, Michael Sommer. Angew. Chem. Int. Ed. 2024, e202409369
Sterically distorted donor-acceptor p‑systems, termed DA springs, can be progressively planarized under mechanical load causing a bathochromic shift of the photoluminescence (PL) spectrum. By combining theory and experiment, we here use a simple linear force calibration for two different conformational mechanochromophores to determine molecular forces in polymers from the mechanochromic shift in PL wavelength during multiple uniaxial tensile tests. Two systems are used, i) a highly entangled linear glassy polyphenylene and ii) a covalent elastomeric polydimethylsiloxane network. The mean forces estimated by this method are validated using known threshold forces for the mechanochemical ring-opening reactions of two different spiropyran force probes. The agreement between both approaches underlines that these DA springs provide the unique opportunity for the online monitoring of local molecular forces present in diverse polymer matrices.(more...)
List of Publications
- Triangular dewetting by symmetry breaking in blends of stiff and flexible polymers
- Paul Freyberg. Inaugural-Dissertation zur Erlangung des Doktorgrades der Fakultät für Mathematik und Physik der Albert-Ludwigs-Universität Freiburg, 2015
- Conductive atomic force microscopy measurements on organic nanocrystals
- Sven Renkert. Master Thesis, Fakultät für Mathematik und Physik der Albert-Ludwigs-Universität Freiburg, 2014
- The influence of the additive composition on degradation induced changes in poly(ethylene-co-vinyl acetate) during photochemical aging
- Angelika Beinert, Cornelia Peike, Ines Dürr, Michael D. Kempe, Günter Reiter, Karl-Anders Weiß. 29th European PV Solar Energy Conference and Exhibition, 22-26 Sept. 2014, Amsterdam, The Netherlands
- Wie kristallisieren Polymere?
- Gert Strobl. Physik Journal 13, 47-50 (2014)
- The Crucial Role of Cadmium Acetate-Induced Conformational Restriction in Microscopic Structure and Stability of Polystyrene-block-Polyvinyl pyridine Thin Films
- Feifei Xue, Hongfei Li, Jichun You, Conghua Lu, Günter Reiter, Shichun Jiang. Polymer 55, 5801-5810 (2014)
- Molecular Weight Dependent Changes in Morphology of Solution Grown Polyethylene Single Crystals
- Bin Zhang, Jingbo Chen, Moritz C. Baier, Stefan Mecking, Renate Reiter, Rolf Mülhaupt, Günter Reiter. Macrom. Rapid Comm. 36, 181-189 (2015)
- Annealing-Induced Periodic Patterns in Solution Grown Polymer Single Crystals
- Bin Zhang, Jingbo Chen, Hui Zhang, Moritz C. Baier, Stefan Mecking, Renate Reiter, Rolf Mülhaupt, Günter Reiter, RSC Advances 5, 12974 (2015)
- Anisotropic Photophysical Properties of Highly Aligned Crystalline Structures of a Bulky Substituted Poly(thiophene)
- Yingying Wang, Barbara Heck, Daniel Schiefer, John O. Agumba, Michael Sommer, Tao Wen, and Günter Reiter. ACSMacroLett. 3, 881-885 (2014)
- Cellulose nanocrystals’ production in near theoretical yields by 1-butyl-3-methylimidazolium hydrogen sulfate ([Bmim]HSO4) – mediated hydrolysis
- Jia Mao, Barbara Heck, Günter Reiter, Marie-Pierre Laborie. Carbohydrate Polymers 117, 443–451 (2015)
- Correlating polymer crystals via self-induced nucleation
- Hui Zhang, Muhuo Yu, Bin Zhang, Renate Reiter, Maximilian Vielhauer, Rolf Mülhaupt, Jun Xu, Günter Reiter. PhysRevLett 112, 237801 (2014)
- Nickel Catalyst with a Hybrid P, N Ligand for Kumada Catalyst Transfer Polycondensation of Sterically Hindered Thiophenes
- Daniel Schiefer, Tao Wen, Yingying Wang, Pierre Goursot, Hartmut Komber, Ralf Hanselmann, Pierre Braunstein, Günter Reiter, Michael Sommer. ACSMacroLett. 3, 617-621 (2014)
- Tunneling Spectroscopy Measurements on Hydrogen-Bonded Supramolecular Polymers
- François Vonau, Dominique Aubel, Laurent Bouteiller, Roozbeh Shokri, Günter Reiter, Olga Guskova, Laurent Simon. Nanoscale 6, 8250 (2014)
- Pattern Formation on Single Crystals of Isotatic Polystyrene in Thin Films
- Hui Zhang. Inaugural-Dissertation zur Erlangung des Doktorgrades der Fakultät für Mathematik und Physik der Albert-Ludwigs-Universität Freiburg, 2014
- Investigation of Structure Formation and Reorganization of Polymer Crystals
- Bin Zhang. Inaugural-Dissertation zur Erlangung des Doktorgrads der Fakultät für Chemie und Pharmazie, 2014
- Anisotropic charge transport in large single crystals of π-conjugated organic molecules
- Wael Hourani, Khosrow Rahimi, Ioan Botiz, Felix Peter Vinzenz Koch, Günter Reiter, Peter Lienerth, Thomas Heiser, Jean-Luc Bubendorff, and Laurent Simon. Nanoscale 6, 4774 (2014)
- Crystallization of Poly(γ-benzyl L-glutamate) in Thin Film Solutions: Structure and Pattern Formation
- Kaiwan Jahanshahi, Ioan Botiz, Renate Reiter, Ralf Thomann, Barbara Heck, Roozbeh Shokri, Werner Stille and Günter Reiter. Macromolecules 46, 1470-1476 (2013)
- Light absorption of poly(3-hexylthiophene) single crystals
- Khosrow Rahimi, Ioan Botiz, John O. Agumba, Sajedeh Motamen, Natalie Stingelin, Günter Reiter. RSC Adv. 4, 11121 (2014)
- Some unique features of polymer crystallisation
- Günter Reiter. Chem. Soc. Rev., 43, 2055-65 (2014), DOI: 10.1039/C3CS60306G
- Reversible Crystallization and Dissolution of Poly(γ-benzyl L-glutamate) in Thin Film Solutions via Addition and Removal of a Nonsolvent
- Kaiwan Jahanshahi. Inaugural-Dissertation zur Erlangung des Doktorgrades der Fakultät für Mathematik und Physik der Albert-Ludwigs-Universität Freiburg, 2013
- Massive Enhancement of Photoluminescence through Nanofilm Dewetting
- Peiwei Lee, Wei-Cheng Li, Bin-Jih Chen, Chih-Wei Yang, Chun-Chih Chang, Ioan Botiz, Günter Reiter, Tsang-Lang Lin, Jau Tang, and Arnold Chang-Mou Yang. ACS Nano 7, 6658–6666 (2013)