Article
Materials Science, Multidisciplinary
S. M. Masoudpanah
Summary: Rod-like NiCo2O4 powders were synthesized using hydrothermal method and their structure and morphology were modified by adding PVP surfactant. The NiCo2O4 powders fabricated with PVP agent exhibited higher crystallinity and oxygen vacancies, resulting in improved microwave absorption performance. These findings are significant for the development of materials with efficient microwave absorption properties.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Environmental Sciences
Kumar Mageswari, Peethambaram Prabukanthan, Jagannathan Madhavan
Summary: This study synthesized ZnO nanoparticles using microwave-assisted method from different zinc salts, and examined their stability and characteristics by capping them with various agents. The XRD analysis showed decreased crystallinity of ZnO nanoparticles with different capping agents, and SEM revealed the influence of capping agents on the morphology. UV-Vis DRS studies confirmed a decrease in band gap of synthesized ZnO nanoparticles with different capping agents. Additionally, the photocatalytic degradation efficiency of the prepared samples was assessed, with ZnO nanoparticles synthesized from zinc nitrate and SHMP capping agent showing the highest efficiency.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Chenguang Yang, Dale Xie, Sheng Wang
Summary: In this study, palygorskite/polyaniline/ZnO nanocomposites were synthesized using a simple two-step solution method, with palygorskite acting as a carrier. The introduction of palygorskite was found to effectively prevent the aggregation of polyaniline shells and ZnO rods, resulting in excellent microwave absorption properties across multiple frequency bands. The optimized sample exhibited high absorption and wide bandwidth capabilities, making it a promising candidate for high-performance microwave absorbers.
Article
Biochemistry & Molecular Biology
Nilamuni H. de Silva, Suneela Pyreddy, Ewan W. Blanch, Helmut M. Hugel, Subashani Maniam
Summary: A library of Sox-pyrrolizidines was efficiently synthesized through a new method, and Nitro-Sox compounds were found to inhibit HEWL amyloid fibril formation. Further experiments suggested that these compounds could potentially combat amyloid misfolding, indicating their potential for Alzheimer's disease treatment.
BIOORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Lihong Wu, Guizhen Wang, Shaohua Shi, Xiao Liu, Jun Liu, Jinchuan Zhao, Guilong Wang
Summary: A flexible microwave absorber with excellent Joule heating performance was successfully fabricated by incorporating a hierarchical Ni-carbon microtube into a processable polytetrafluoroethylene matrix. The absorber exhibited outstanding low-frequency microwave absorption property and was used to design an electromagnetic sensor, expanding the application scope of microwave absorbers.
Article
Polymer Science
Ricardo Sandin, Maria Gonzalez-Lucas, Patricio A. Sobarzo, Claudio A. Terraza, Eva M. Maya
Summary: Three new cross-linked melamine-based polyaminal networks were easily prepared by microwave irradiation with high nitrogen content, specific surface area, and thermal stability. Among them, MA-Py showed the highest adsorption capacities for Cr(VI), Cd(II), and Pb(II), competitive with commercial ion exchange resins.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Chemistry, Physical
Yue Yuan, Shicheng Wei, Yi Liang, Bo Wang, Yujiang Wang, Wei Xin, Xinlei Wang, Yu Zhang
Summary: The cobalt ferrite/carbon nanotubes nanocomposite absorber materials synthesized by a solvothermal method demonstrate excellent absorption properties and a wide absorption bandwidth, making them suitable for microwave absorbers in various technological applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Fernando Jose Soares Barros, Klebson Lucas Pereira Cardoso, Elson Longo, Auro Atsushi Tanaka, Marco Aurelio Suller Garcia, Ivo Mateus Pinatti
Summary: In the face of current energy and environmental challenges, electrochemical storage devices, particularly supercapacitors, have emerged as a promising alternative. This study focuses on the utilization of nanospheres of gadolinium vanadate as electrode material, synthesized by microwave-assisted hydrothermal method, which exhibits interesting properties for energy storage applications. A high specific capacitance and good cycling stability were achieved, indicating the potential of gadolinium vanadate as an electrode material in electrochemical energy storage applications.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Engineering, Environmental
Rambabu Kuchi, Viet Dongquoc, Phuoc Cao Van, Dongsoo Kim, Jong-Ryul Jeong
Summary: Porous Fe3O4-SnO2 core-void-shell nanocomposites were fabricated using a modified synthesis method, exhibiting excellent microwave absorption performance with strong reflection loss and wide bandwidth characteristics. The high performance is attributed to the synergistic effect between the core-shell structure and void space, making it a novel approach for high-performance microwave absorbers in the field of electromagnetic wave absorption.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Analytical
Ting-Ting Liang, Dong-Seog Kim, Ji-Wook Yoon, Yeon-Tae Yu
Summary: The rhombohedral In2O3 nanoparticles exhibit higher ethanol gas response and excellent ethanol selectivity compared to cubic and mixed-phase In2O3 nanoparticles, making them potentially useful in high-performance breathalyzers for screening drunk drivers.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Engineering, Electrical & Electronic
Priya Yadav, Samta Manori, Pankaj Chamoli, Kuldeep Kumar Raina, Ravi Kumar Shukla
Summary: This work presents the green, microwave-mediated, rapid, and economical synthesis of gamma-Fe2O3 nanoparticles (NPs) using Mangifera indica leaves extract. The γ-Fe2O3 NPs exhibit superparamagnetic behavior and have a spherical shape with a particle size of about 13 nm. Photocatalytic testing shows that the γ-Fe2O3 NPs can efficiently degrade dyes under UV irradiation, making them suitable for wastewater and crude dye mixture treatment.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Organic
Ei Seul Yun, Muhammad Saeed Akhtar, Sonaimuthu Mohandoss, Yong Rok Lee
Summary: A catalyst-free microwave-assisted annulation protocol has been developed for the preparation of biologically interesting pyrido-fused quinazolinones and pyrido[1,2-a]benzimidazoles. This approach offers a rapid and facile method with a broad substrate scope, good yields, catalyst-free conditions, and high functional group tolerance. The synthesized compound can also serve as an on-off photoluminescent probe for the selective detection of Fe3+ and Ag+ metal ions.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Hao Zhang, Qingjun Ding, Gai Zhao, Jing Fu Song
Summary: NiCo2O4/CF composites with strong absorption capacity, wide effective absorption bandwidth, low filling, lightweight and thin thickness were synthesized in this study. The composites showed excellent microwave absorption properties due to the synergistic effect of dielectric loss and magnetic loss, good impedance matching characteristics and more Debye relaxation processes. This provides important guidelines for the structure and component design of lightweight microwave absorbing materials.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Rakesh Manna, Kalyan Ghosh, Suneel Kumar Srivastava
Summary: By optimizing the FG/Ni ratio, the synthesized FG/Ni/PANI ternary composites exhibit enhanced electromagnetic interference shielding efficiency, with good absorption performance for electromagnetic waves in the 2-8GHz range, showing great potential for applications.
Article
Chemistry, Physical
Nada Abdulwali, Joshua van der Zalm, Antony R. Thiruppathi, Aiman Khaleel, Aicheng Chen
Summary: Well-dispersed mono-carbon microspheres with uniform morphology and abundant oxygen functional groups were synthesized via hydrothermal carbonization of ascorbic acid. The size of the carbon spheres could be easily controlled by adjusting the reaction conditions. The synthesized carbon spheres exhibited high antibacterial activity against E. coli and S. aureus, making them promising for various applications in surface coating, medical, and environmental fields.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Multidisciplinary
Antonia Fruntke, Mira Behnke, Leanne M. Stafast, Tom Trader, Elisabeth Dietel, Antje Vollrath, Christine Weber, Ulrich S. Schubert, Timm Wilke
Summary: This publication presents a series of experiments in the field of nanomedicine for high school chemistry education and student laboratories, developed as a collaborative project between chemistry didactics and chemical research. In this context, polymeric nanocarriers represent a promising approach for drug delivery, acting as smart packaging material to ensure transport to the desired location in the body and a targeted release. All experiments can be performed with simple and harmless chemicals within a time frame of two school lessons.
JOURNAL OF CHEMICAL EDUCATION
(2023)
Editorial Material
Chemistry, Multidisciplinary
Clara Zens, Christian Friebe, Ulrich S. Schubert, Martin Richter, Stephan Kupfer
Summary: The development of organic batteries with stable radicals integrated within a conductive polymer backbone is crucial for sustainable energy storage devices. In this study, quantum chemical and quantum dynamical simulations were used to investigate the impact of substitution patterns, lengths, chemical linkers, and ratio of TEMPO and thiophene units on the thermodynamic properties and charge transfer kinetics. Two promising candidates with improved properties were synthesized and electrochemically characterized.
Article
Electrochemistry
Misgina Tilahun Tsehaye, Xian Yang, Tobias Janoschka, Martin D. Hager, Ulrich S. Schubert, Emilie Planes, Fannie Alloin, Cristina Iojoiu
Summary: Membrane development is crucial in organic redox flow batteries (ORFBs). In this study, a series of anion exchange membranes made from poly(p-phenylene oxide) (PPO) with different functionalization degrees, cationic moieties, and crosslinking degrees were designed. The membrane prepared from PPO and trimethylamine moiety attached via a C6-spacer showed the best overall cell performance, with high capacity retention (94% after over 100 consecutive cycles), higher peak power density (293 mW center dot cm(-2) at 16 mL center dot min(-1)), and energy efficiency (80%) compared to the commercial reference membrane FAA-3-50.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Binson Babu, Christof Neumann, Simon Muench, Marcel Enke, Lukas Medenbach, Christian Leibing, Alexandra Lex-Balducci, Andrey Turchanin, Ulrich S. Schubert, Andrea Balducci
Summary: In this work, a new diglyme-based gel-polymer electrolyte (DOKBn-GPE) suitable for potassium-ion capacitors (KIC) is reported. The gel polymer electrolyte shows good mechanical stability, high ionic conductivity (2.84 mS cm-1 at 20 degrees C), and broad electrochemical stability (> 5.0 V). By using this electrolyte in KIC, devices with high energy density and stability during prolonged charge-discharge and float tests can be achieved. These results indicate that the development of diglyme-based gel-polymer electrolytes is a promising strategy for high-performance K-based energy storage devices.
ENERGY STORAGE MATERIALS
(2023)
Article
Chemistry, Physical
Ivan A. Volodin, Christian Stolze, Oliver Nolte, Philip Rohland, Martin D. Hager, Ulrich S. Schubert
Summary: An increasing number of redox-active substances with improved electrochemical stability is being studied for potential applications in redox flow batteries. This study compares two recently established stability assessment techniques and evaluates their accuracy in measuring the capacity fade rate of a specific redox species. The results show that both techniques have high standard deviations and may not provide accurate measurements for highly stable redox couples.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Thomas Baeatz, Ilya Anufriev, Chiao-Hsuan Pai, Timo Schuett, Ivo Nischang, Stefan Zechel, Martin D. Hager, Yi-Tsu Chan, Ulrich S. Schubert
Summary: Miktoarm star polymers are a type of branched polymers with a star-shaped architecture based on different assembly properties. The synthesis of these polymers can be challenging, especially when using covalent strategies to link different polymers. This study presents an approach using orthogonal metal-ligand interactions to connect the building blocks and create miktoarm topology. The structures obtained are investigated using diffusion-ordered nuclear magnetic resonance spectroscopy, analytical ultracentrifugation, and dynamic light scattering.
ACS APPLIED POLYMER MATERIALS
(2023)
Correction
Polymer Science
Lisa Ehrlich, Doris Pospiech, Upenyu L. Muza, Albena Lederer, Julia Muche, Dieter Fischer, Petra Uhlmann, Felix Tzschoeckell, Simon Muench, Martin D. D. Hager, Ulrich S. S. Schubert
MACROMOLECULAR CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Biomaterials
Thomas Orasch, Gauri Gangapurwala, Antje Vollrath, Katherine Gonzalez, Julien Alex, Alicia De San Luis, Christine Weber, Stephanie Hoeppener, Zoltan Cseresnyes, Marc Thilo Figge, Carlos Guerrero-Sanchez, Ulrich S. Schubert, Axel A. Brakhage
Summary: The treatment of life-threatening fungal infections is currently limited and in urgent need of improvement. This study explores the use of polymeric particles for efficient delivery of antifungal compounds to fungal cells. The particles, made of biocompatible polymers, were able to transport hydrophobic cargos into fungal cells and reduce the minimal inhibitory concentration of the encapsulated drug. This research provides insights into improving the delivery of antifungal compounds for more effective treatment.
BIOMATERIALS ADVANCES
(2023)
Article
Multidisciplinary Sciences
Peipei Zuo, Chunchun Ye, Zhongren Jiao, Jian Luo, Junkai Fang, Ulrich S. Schubert, Neil B. McKeown, T. Leo Liu, Zhengjin Yang, Tongwen Xu
Summary: The development of efficient ion-transport membranes is crucial for improving separation processes and electrochemical technologies. We have designed synthetic membranes with covalently bonded polymer frameworks that achieve near-frictionless ion flow through rigidly confined ion channels. These membranes have the potential to greatly enhance the performance of electrochemical devices and molecular separation.
Article
Chemistry, Inorganic & Nuclear
Oliver Bysewski, Andreas Winter, Ulrich S. Schubert
Summary: A tridentate bis-NHC Pd complex based on caffeine was studied for its catalytic activity. The complex exhibited high catalytic activity in Suzuki-Miyaura and Mizoroki-Heck cross-coupling reactions of aryl halides. The Sonogashira cross-coupling reaction was also investigated, showing a rapid plateauing of the reaction. Aryl iodides and aryl bromides with both electron-donating and electron-withdrawing substituents were reactive, as well as aryl chlorides with electron-withdrawing groups under the applied conditions.
Article
Polymer Science
Robin Kampes, Alexander Kleine, Silas Langstein, Stefan Zechel, Martin D. Hager, Ulrich S. Schubert
Summary: This study presents the synthesis and characterization of a clickable iridium(III) complex as a halogen bond-based anion sensor. The functionalization with a polymer, exemplified by poly(ethylene glycol) azide attachment via copper-click-reaction, is demonstrated. The polymeric XB donor complex is extensively characterized and its strong anion complexation capabilities are shown through emission titrations. These findings highlight the potential of using polymeric substituents on the iridium complex to tune its properties or incorporate other functions such as cation complexation sites to exploit cooperative effects.
MACROMOLECULAR CHEMISTRY AND PHYSICS
(2023)
Article
Polymer Science
Victor D. Lechuga-Islas, Dulce M. M. Sanchez-Cerrillo, Steffi Stumpf, Ramiro Guerrero-Santos, Ulrich S. S. Schubert, Carlos Guerrero-Sanchez
Summary: Inspired by the versatility of functional polymer materials, we developed a family of polymer catalysts that combine efficient catalytic groups with stimuli-responsive properties. By modulating the anion exchange in polymers, we were able to control the physical properties and achieve reversible thermal transitions. These polymer catalysts demonstrated high conversion and selectivity in the depolymerization of post-consumer PET, and their thermo-responsive properties allowed for catalyst recovery and reuse.
Article
Pharmacology & Pharmacy
Mira Behnke, Paul Klemm, Philipp Dahlke, Blerina Shkodra, Baerbel Beringer-Siemers, Justyna Anna Czaplewska, Steffi Stumpf, Paul M. Jordan, Stephanie Schubert, Stephanie Hoeppener, Antje Vollrath, Oliver Werz, Ulrich S. Schubert
Summary: Dextran-based polymers, specifically ethoxy acetalated dextran (Ace-DEX), show potential as drug delivery vehicles due to their easy synthesis, straightforward particle preparation, and pH-dependent degradation. This study compares Ace-DEX with the FDA-approved polymer poly(lactic-co-glycolic acid) (PLGA) and finds that Ace-DEX has the potential to outperform PLGA in terms of encapsulation properties. Three different methods were used to prepare BRP-187-loaded Ace-DEX nanoparticles and evaluate their physicochemical properties.
INTERNATIONAL JOURNAL OF PHARMACEUTICS-X
(2023)
Article
Chemistry, Physical
Johannes Schenk, Desiree Leistenschneider, Stephanie Hoeppener, Ulrich S. Schubert, Konstantin Schutjajew, Martin Oschatz
Summary: This study investigates the fundamental processes in hybrid ion capacitors using carbon blacks and demonstrates the impact of minor structural differences on electrochemical behavior. The results show that post-treated carbon blacks suffer from diffusion limitations in sodium-ion capacitors due to smaller graphene interlayer distances, while in lithium-ion capacitors, diffusion is not hindered, indicating other factors like electric conductivity may limit the performance.
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Chemistry, Multidisciplinary
Florian Behrendt, Yun Deng, David Pretzel, Steffi Stumpf, Nicole Fritz, Michael Gottschaldt, Georg Pohnert, Ulrich S. S. Schubert
Summary: In microbial consortia, bacteria settle on other organisms for nutrients and organic material. This is also seen in plankton, where microalgae provide bacteria with metabolites for growth. Investigating these processes is challenging due to the difficulty of mimicking the spatially structured environment provided by algae. Here, we present a cryogel-based microstructured habitat that mimics the ecological situation in the plankton by providing dimethylsulfoniopropionate (DMSP) as a carbon and sulfur source. The cryogels, synthesized using a novel DMSP derived building block, provide structured surfaces for bacterial settlement and deliver organic material for growth.
MATERIALS HORIZONS
(2023)
