Article
Polymer Science
Taichi Ikeda
Summary: Glycidyl triazolyl polymer (GTP)-based anionic poly-(ionic liquid)-s were synthesized and characterized. These anionic GTPs exhibited phase separation behavior and lower Tg compared to cationic GTPs. The presence of water improved the ionic conductivity. The electrostatic interaction between the TFSI pendant and the EMIM cation influenced the polymer-polymer interaction.
Article
Chemistry, Physical
Christian Dressler, Jonas Ha''nseroth, Daniel Sebastiani
Summary: Phosphoric acid can exist in both a neutral molecule and an anion form, and our theoretical simulations have confirmed the coexistence of a cationic form (H4PO4+) and an anionic form (H2PO4-) in the same salt. This coexistence is achieved through the partial substitution of Cs+ by H4PO(4)(+) in CsH2PO4. The protonation pattern within the unique hydrogen bond network between the ions is analyzed, showing the need for a fractional assignment of protons to both nearest and next-nearest oxygen neighbors instead of a conventional assignment of protonation states of the phosphate groups.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Engineering, Environmental
Hongling Fang, Yi Li, Hua Li, Songwei Zhang, Qi Ding, Wei Yu, Litian Hu
Summary: Ionic liquids (ILs) have emerged as promising lubricant materials to reduce friction and wear in mechanical systems. A new oil-soluble IL lubricant additive, [C11-IM][DEHP], shows significantly superior lubrication performance compared to conventional additives, even at high normal loads. Its extremely low effective concentration is vital for environmental protection and cost reduction.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Mohammed Zain Aldin, Guillermo Zaragoza, William Deschamps, Jean-Claude Didelot Tomani, Jacob Souopgui, Lionel Delaude
Summary: An efficient synthetic protocol was developed for the preparation of five cationic ruthenium-arene complexes bearing imidazol(in)ium-2-dithiocarboxylate ligands, which were fully characterized using various analytical techniques. The compounds studied showed high solubility in water and exhibited strong cytotoxicity against leukemia cells.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Physical
Faiz Warsi, Mohd Usman, Maroof Ali
Summary: This study investigates the interaction between DTAC and SDS, two conventional surfactants, with IL in aqueous medium, as well as the influence of temperature on their aggregation behavior. By measuring the CMC values and thermodynamic parameters, the effect of IL on aqueous surfactant solutions is revealed, and the use of Fourier transform infrared spectroscopy allows for the exploration of structural changes in the mixed system.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Ahmad Bagheri
Summary: In this study, the interaction between an amphiphilic drug and ionic surfactants in binary mixtures was investigated in the micellar phase using conductometric technique. The results showed attractive interactions between components in both systems, with the NLS/PPL system exhibiting stronger micelle formation capability and synergistic effects. Conductometry measurements indicated higher extent of counterion binding in mixed micelles for the SAIL/PPL system compared to the NLS/PPL system.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Engineering, Environmental
Ligang Zhang, Yuexia Guo, Huanfei Xu, Guitao Li, Fuyan Zhao, Ga Zhang
Summary: The study investigated the lubrication performance of water-soluble graphitic carbon nitride (g-C3N4) materials and ionic liquid grafted WS-CN as water lubricants, revealing that even small amounts of WS-CN can greatly improve lubrication effects. Compared to lubricating with DI water, IL@WS-CN dispersion significantly reduced wear and friction.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Manishkumar R. Shimpi, Patrick Rohlmann, Faiz Ullah Shah, Sergei Glavatskih, Oleg N. Antzutkin
Summary: It was found that Li[BOB]·nH(2)O salts were not suitable for the synthesis of high-purity orthoborate-based tetraalkylphosphonium ionic liquids, while Na[BOB] was found to be more suitable. Therefore, a preparation protocol for ultra-pure Na[BOB] was developed, resulting in boron-impurity-free ionic liquids with significantly different physico-chemical properties compared to those containing transition anionic complexes. This work highlights the implications of boron-containing transition anionic complexes in tetraalkylphosphonium-orthoborate ILs used in various applications.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Masamichi Kiyoura, Ayano Yoshitake, Haruka Soku, Masatoshi Tokita
Summary: We have investigated the ionic conductivity of liquid crystalline poly(substituted methylene)s (PMs) containing ionic liquid (IL) moieties attached to the main chain via alkyl spacers. The results showed that these PMs have twice the ionic conductivity of conventional polyacrylate ILs with similar glass transition temperatures. The atactic PM with a twelve-methylene unit in the alkyl spacer exhibited the highest ionic conductivity of 5.9 x 10-5S cm-1 at 30°C.
Article
Biochemistry & Molecular Biology
Ahmed Salama
Summary: The synthesis and characterization of a novel cellulose derivative as a sustainable adsorbent for cationic and anionic dyes are described. The cellulose derivative demonstrated efficient adsorption for methylene blue and methyl orange removal.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Analytical
Laure Wiest, Barbara Giroud, Azziz Assoumani, Francois Lestremau, Emmanuelle Vulliet
Summary: A multi-family analytical strategy for quantifying surfactants in surface waters was developed, optimized, and validated, with the method suitable for monitoring low concentrations of surfactants. Anionic, cationic, and non-ionic surfactants were detected in French river water samples, with median concentrations ranging from 24 ng/L to 4.6 μg/L.
Article
Environmental Sciences
Asmaa Bouyahya, Berthe-Sandra Sembo-Backonly, Audrey Favrelle-Huret, Sebastien Balieu, Frederic Guillen, Valerie Mesnage, Carole Karakasyan-Dia, Mohammed Lahcini, Didier Le Cerf, Geraldine Gouhier
Summary: A new hybrid material was developed through innovative supramolecular tripartite association, showing excellent inclusion properties and extraction efficiency, which is significant for green analytical chemistry.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Environmental
Rawan Abu Alwan, Botagoz Zhuman, Mahendra Kumar, Hassan A. Arafat, Inas AlNashef
Summary: This study synthesized novel mussel-inspired polydopamine nanoparticles functionalized with ionic liquid (PDA-IL) and used them as an efficient adsorbent for the removal of anionic dyes from aqueous solutions. The PDA-IL showed a high adsorption capacity, fast kinetics, excellent selectivity, and high regeneration efficiency. Characterization results confirmed the formation of nano-sized PDA-IL particles with a polycrystalline structure.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Mamoun Fellah, Naouel Hezil, Kamel Guerfi, Ridha Djellabi, Alex Montagne, Alain Iost, Kirill Borodin, Aleksei Obrosov
Summary: The study found that anionic surfactant showed better adsorption on kaolinite compared to cationic surfactant; the adsorption kinetics fit the pseudo-second-order model well; BDDAB adsorption tended to follow Langmuir-Freundlich and Freundlich isotherm models, while SDS adsorption adhered only to the Langmuir-Freundlich model.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Cesar M. Laureano-Anzaldo, Jorge R. Robledo-Ortiz, Ricardo Manriquez-Gonzalez
Summary: This study developed zwitterionic cellulose with versatile potential for removing various anionic and cationic dyes, achieving high removal efficiency.
Article
Chemistry, Multidisciplinary
Michal Kern, Lorenzo Tesi, David Neusser, Nadine Russegger, Mario Winkler, Alexander Allgaier, Yannic M. Gross, Stefan Bechler, Hannes S. Funk, Li-Te Chang, Joerg Schulze, Sabine Ludwigs, Joris van Slageren
Summary: The study reports the preparation and properties of hybrid materials consisting of conducting polymers and molecular quantum bits. The research shows that the favorable electrical properties of organic semiconductors can be preserved in the presence of molecular quantum bits, and mobile charge carriers exist in low-temperature environments.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Carsten Dingler, Henry Mueller, Matthias Wieland, Dominik Fauser, Holger Steeb, Sabine Ludwigs
Summary: Nature serves as an endless inspiration for man-made smart materials and multifunctional devices. This study presents bilayers as autonomously moving, humidity-triggered bending actuators that show reproducible bending behavior. The research reveals that volumetric strain and Young's modulus, both influenced by water uptake, dominate the bending behavior and curvature of the actuators.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Physical
Parisa Shiri, David Neusser, Claudia Malacrida, Sabine Ludwigs, Loren G. Kaake
Summary: The electrochemical reduction and oxidation of pi-conjugated materials is a common tool for characterization, involving mixed ion-carrier transport. This study characterizes the uptake of perchlorate ions in P3HT thin films using in situ infrared spectroscopy and cyclic voltammetry, highlighting the importance of ion diffusion in the charging and discharging dynamics. The results suggest a single, voltage-dependent diffusivity can almost entirely describe the movement of ClO4-/hole polaron pairs in the system.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Nanoscience & Nanotechnology
Aamir Iqbal Waidha, Thimo Ferber, Manuel Donzelli, Niloofar Hosseinpourkahvaz, Vanita Vanita, Klaus Dirnberger, Sabine Ludwigs, Rene Hausbrand, Wolfram Jaegermann, Oliver Clemens
Summary: The research demonstrates that as the ceramic weight fraction increases in the composites, the ionic conductivity is reduced, and alternative lithium-ion transport pathways become accessible compared to filler-free electrolytes. The study explores the role of the chemical and morphological properties of the ceramic filler in polymer-rich and ceramic-rich composite electrolytes, highlighting the significant contribution of the intrinsic conductivity of the ceramic filler to the overall conductive process in the ceramic-rich systems. Additionally, the stability of the garnet/PEO interface is investigated using X-ray photoelectron spectroscopy, and its impact on lithium-ion transport is studied via EIS.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Review
Chemistry, Multidisciplinary
James W. Borchert, R. Thomas Weitz, Sabine Ludwigs, Hagen Klauk
Summary: This passage discusses the importance of reducing high contact resistance at the interfaces between organic semiconductors and source/drains to fully utilize the performance improvements in organic transistors. The control of thin-film morphology of the organic semiconductor has been the key factor in achieving low contact resistances, while other approaches like increasing charge-carrier density have played a minor role. The challenges in forming optimized interfaces with organic semiconductors and the prevalence of Fermi-level pinning are also highlighted in the discussion.
ADVANCED MATERIALS
(2022)
Article
Polymer Science
Carsten Dingler, Ramon Walter, Bruno Gompf, Sabine Ludwigs
Summary: This study provides insights into the evolution of optical constants, conductivity, and swelling properties of poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) films in an acetonitrile-based electrolyte as a function of doping level. The comprehensive spectroelectrochemical study reveals that the films are optically and electronically anisotropic, with the optical constants strongly varying with applied potential. The films also exhibit a plateau conductivity over large potential ranges and remarkable swelling behavior.
Article
Chemistry, Multidisciplinary
Viktoria Gruen, Satoshi Kajiyama, Sabine Rosenfeldt, Sabine Ludwigs, Anna S. Schenk, Takashi Kato
Summary: This study introduces a bio-inspired room-temperature method to precipitate one-dimensional cobalt carbonate as a precursor to Co3O4. By combining confined submicrometer reaction environments with a carboxylated polyelectrolyte, the infiltration into cylindrical pores can be controlled.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Chemistry, Multidisciplinary
Fabian Borrmann, Takuya Tsuda, Olga Guskova, Nataliya Kiriy, Cedric Hoffmann, David Neusser, Sabine Ludwigs, Uwe Lappan, Frank Simon, Martin Geisler, Bipasha Debnath, Yulia Krupskaya, Mahmoud Al-Hussein, Anton Kiriy
Summary: The understanding and applications of electron-conducting pi-conjugated polymers with naphtalene diimide (NDI) blocks have made remarkable progress. A study has been conducted to develop an n-type conducting NDI polymer with enhanced stability of its n-doped states for prospective in-water applications. The study uses a combined experimental-theoretical approach to identify critical features and parameters that control the doping and electron transport process.
Article
Materials Science, Multidisciplinary
Ji Hwan Kim, Matthias Wieland, Beatrice Omiecienski, Youngseok Kim, Jaeil Park, Gunwoo Kim, Sabine Ludwigs, Myung-Han Yoon
Summary: In this study, the mixed conducting properties of PEDOT:PSS were effectively modulated by crosslinking with biocompatible nonconductive PVA. The resulting PEDOT:PSS-PVA films showed a linear threshold voltage shift with minimal loss of transconductance, suggesting an effective modulation of operational characteristics. The ion transport dynamics were also affected by the PVA content, which was related to the crystallite size and ionic functional group density in the system.
FLEXIBLE AND PRINTED ELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Lorenzo Tesi, Friedrich Stemmler, Mario Winkler, Sherri S. Y. Liu, Saunak Das, Xiuming Sun, Michael Zharnikov, Sabine Ludwigs, Joris van Slageren
Summary: The development of quantum technologies aims to achieve exponentially faster computations, ultrahigh performance sensing, and a comprehensive understanding of many-particle quantum systems. Molecular spins have emerged as excellent candidates for qubits due to their long coherence times, tunability through chemical synthesis, and compatibility with other quantum platforms. However, integrating molecular spin qubits into quantum devices and preserving their quantum properties on surfaces remains a challenge. This study presents a versatile bottom-up approach to arrange molecular qubits as self-assembled monolayers on surfaces, demonstrating the maintenance or even enhancement of qubit properties.
ADVANCED MATERIALS
(2023)
Article
Multidisciplinary Sciences
Julian Karst, Yohan Lee, Moritz Floess, Monika Ubl, Sabine Ludwigs, Mario Hentschel, Harald Giessen
Summary: This study demonstrates electrically switchable metallic polymer metalenses, whose optical states and focal length can be adjusted via CMOS compatible voltages, opening up new possibilities for ultra-compact photonic integration.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Carolin Rieg, Manuel Kirchhof, Katrin Gugeler, Ann-Katrin Beurer, Lukas Stein, Klaus Dirnberger, Wolfgang Frey, Johanna R. R. Bruckner, Yvonne Traa, Johannes Kaestner, Sabine Ludwigs, Sabine Laschat, Michael Dyballa
Summary: We developed a method to quantify the accessible Rh complexes in SBA-15 mesopores via solid state NMR spectroscopy. By combining P-31 MAS NMR and ICP-OES, the P/Rh ratio was determined, revealing that only up to 39% of the immobilized Rh complexes were accessible. With this methodology, the accessibility and spatial distribution of immobilized molecular catalysts can be evaluated quantitatively for the first time.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Derek de Jong, Julian Karst, Dominik Ludescher, Moritz Floess, Sophia Moell, Klaus Dirnberger, Mario Hentschel, Sabine Ludwigs, Paul V. Braun, Harald Giessen
Summary: We propose an electrically switchable, compact metasurface device based on PEDOT:PSS and a gel polymer electrolyte. By applying square-wave voltages, the PEDOT:PSS can be reversible switched from dielectric to metallic state. We demonstrate a compact standalone metadevice that allows for electrically controlled tuning of plasmonic resonances and beam switching. Our work paves the way for solid-state switchable metasurfaces and switchable holographic devices.
Article
Materials Science, Multidisciplinary
David Neusser, Bowen Sun, Wen Liang Tan, Lars Thomsen, Thorsten Schultz, Lorena Perdigon-Toro, Norbert Koch, Safa Shoaee, Christopher R. McNeill, Dieter Neher, Sabine Ludwigs
Summary: Recent advances in organic solar cell performance have been driven by combining high-performance donor-acceptor copolymers and small molecule acceptors. The solvent used during processing greatly affects the device performance. In this study, the authors propose a spectroelectrochemical method to investigate the redox behavior and energy levels of the compounds in blend films. The results show a nearly zero driving force for the dissociation of excitons and the importance of molecular orientation at the interface for device performance.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Julian Karst, Juliane Ratzsch, Jinglin Fu, Monika Ubl, Tobias Pohl, Florian Stetl, Claudia Malacrida, Matthias Wieland, Bernhard Reineke, Thomas Zentgraf, Sabine Ludwigs, Mario Hentschel, Harald Giessen
Summary: This study introduces a novel electrically switchable metasurface technology using conducting polymer PEDOT as an active material, allowing for intensity-tunable beam diffraction up to 10 degrees with an externally applied voltage.
2021 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
(2021)
