Article
Chemistry, Multidisciplinary
Bruno T. Luppi, Abhishek Muralidharan, Nils Ostermann, I. T. Cheong, Michael J. Ferguson, Inke Siewert, Eric Rivard
Summary: The study successfully prepared functionalized polyacetylenes through a groundbreaking ring-opening metathesis polymerization method, which exhibit good solubility, optical properties, and excellent air stability.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Review
Polymer Science
Jiaxi Xu, Nikos Hadjichristidis
Summary: The incorporation of heteroatom-containing weak bonds along polymer backbones has become a popular tool to accelerate degradation. Many methods have been reported for the synthesis of degradable heteroatom-containing polymers based on step-growth polymerization and chain-growth ring-opening polymerization. Ring-opening metathesis polymerization has emerged as an approach for the synthesis of various types of degradable polymers. This review covers the synthesis of different heteroatom-containing degradable polymers via ring-opening metathesis polymerization and their degradation mechanisms under different conditions.
PROGRESS IN POLYMER SCIENCE
(2023)
Article
Polymer Science
Yucen Zuo, Yufeng Yao, Chunyu Chen, Yixin Liang, Ke-Fang Yang, Ze Li, Guo-Qiao Lai, Pinglu Zhang, Tien-Yau Luh
Summary: The substituents on cyclopropenes and catalysts have a significant impact on the reactivity and selectivity of ring-opening metathesis polymerization (ROMP). In this study, different chemoselectivities were observed when using piperidine-appended spirocyclopropenes (SCPs) and various Grubbs catalysts. The conformational difference between the piperidine and azetidine motifs plays a crucial role in determining the reactivity, selectivity, and polymerization pathway. This work provides insights into the mechanism of chemoselective ROMP of spirocyclopropenes using Grubbs catalysts and offers guidance for designing new ROMP reactions.
Review
Engineering, Biomedical
Peng Wang, Yonghui Yuan, Ke Xu, Hongshan Zhong, Yinghui Yang, Shiyu Jin, Ke Yang, Xun Qi
Summary: Copper is an essential trace element in the human body, impacting health through enzyme and protein functions. Researchers are increasingly focusing on developing novel copper-containing biomaterials with unique properties for cardiovascular protection, bone healing, and antibacterial effects. These materials also show potential in wound healing, cancer treatment, PET imaging, and radiotherapy applications.
BIOACTIVE MATERIALS
(2021)
Article
Polymer Science
Nirmalendu Kuanr, Damon J. Gilmour, Hans Gildenast, Mitchell R. Perry, Laurel L. Schafer
Summary: This study investigated the synthesis of amine-functionalized monomers through ROMP process. The results showed that the amine functionality in the monomers has a significant influence on the polymerization rate and catalytic process.
Article
Polymer Science
Bhaskar Garg, Tanuja Bisht, Yong-Chien Ling
Summary: In this study, a functional silicon copolymer has been constructed through catalytic hydrosilylation reaction, and its extraction performance for organic anions in aqueous-organic solution has been investigated. The copolymer exhibits high selectivity towards chloride anions.
MACROMOLECULAR RAPID COMMUNICATIONS
(2023)
Article
Polymer Science
Rubina Troiano, Mario Carratu, Stefania Pragliola, Antonella Caterina Boccia, Fabia Grisi
Summary: A series of new (oxa)norbornene dicarboximide monomers, decorated with carbazole and coumarin as pendant fluorophore groups, were successfully polymerized by Grubbs' third generation catalyst G3 and cis-selective catalyst GZ. The nature of the spacer between the NDI unit and the chromophore did not affect the outcome of the polymerization. The polymers showed photoluminescence in solution and solid state, with a significant excimer emission observed for a carbazole-functionalized polymer film due to the high stereoregularity degree of the main chain.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Biochemistry & Molecular Biology
Aya Osama Mousa, Zheng-Ian Lin, Cheng-Hsin Chuang, Chih-Kuang Chen, Shiao-Wei Kuo, Mohamed Gamal Mohamed
Summary: In this study, two conjugated microporous polymers (CMPs), An-Ph-TPA and An-Ph-Py CMPs, were synthesized using the Suzuki cross-coupling reaction. The CMPs demonstrated organic structures with p-conjugated skeletons and persistent micro-porosity, containing anthracene moieties linked to triphenylamine and pyrene units. The chemical structures, porosities, thermal stabilities, and morphologies of the synthesized CMPs were characterized using various techniques. The An-Ph-TPA CMP exhibited better thermal stability and higher capacitance performance, making it a potential candidate for electrochemical testing and biological applications.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Polymer Science
Wangmeng Hou, Xiuzhe Yin, Yao Chen, Jianzhong Du, Yongming Chen, Yi Shi
Summary: A novel aqueous ring-opening metathesis polymerization method named ME-ROMP is proposed. It involves injecting a small amount of a CH2Cl2 solution of the Grubbs' third-generation catalyst into the aqueous solution of water-soluble monomers, allowing high efficiency and controlled polymerization without deoxygenation. This method enables the synthesis of well-defined water-soluble polynorbornenes with various compositions and architectures.
Article
Polymer Science
Toshiki Sonoda, Shingo Kobayashi, Masaru Tanaka
Summary: The successful utilization of regioselective ring-opening metathesis polymerization to synthesize polymers modified with tertiary amino groups has demonstrated unique properties in hydration, crystallization, and coating stability under physiological aqueous environment.
Article
Polymer Science
Laura Matesanz-Nino, David Cuellas, Carla Aguilar-Lugo, Laura Palacio, Alfonso Gonzalez-Ortega, Jose G. de la Campa, Cristina Alvarez, Angel E. Lozano
Summary: An optimized synthesis of 2,2'3,3'-biphenyltetracarboxylic dianhydride monomer was performed to obtain high molecular weight polymers. These polymers showed good mechanical properties and high gas separation efficiency, making them suitable for high-pressure gas purification applications.
Article
Polymer Science
Cuiping Hou, Chulu Zhou, Jianhua Cheng
Summary: A series of well-defined ABA-triblock copolymers were synthesized by living ring-opening metathesis polymerization, leading to the subsequent formation of amphiphilic ABA-triblock azobenzene copolymers with light-responsive behavior and self-assembly capability. The reversible structural changes of the copolymers under alternating UV and visible light illumination were demonstrated.
Article
Polymer Science
Lorenzo Marsili, Michele Dal Bo, Giorgio Eisele, Ivan Donati, Federico Berti, Giuseppe Toffoli
Summary: Poly-N-Vinylcaprolactam (PNVCL) is a thermoresponsive polymer with a lower critical solution temperature (LCST) between 25 and 50 degrees C, making it suitable for biomedical and environmental applications. PNVCL-COOH polymers were prepared via free radical polymerization to investigate their structural properties and LCST, which were found to be influenced by molecular mass. The behavior of the polymer in different solution environments, such as aqueous buffers, NaCl solutions and human plasma, was also studied.
Review
Biochemistry & Molecular Biology
Kainat Ahmed, Delawar Ashraf, Ghayoor Abbas Chotana, Amir Faisal, Khalid Mohammed Khan, Rahman Shah Zaib Saleem
Summary: Selenium, as a trace element, plays important biological roles, including neuroprotection, anti-inflammatory, anticancer, antioxidant, hepatoprotective, and immunomodulatory activities. Selenium-containing peptides, such as selenoproteins, offer more health benefits compared to traditional selenium supplements.
CURRENT MEDICINAL CHEMISTRY
(2022)
Review
Polymer Science
Stanko Kramer, Neil R. Cameron, Peter Krajnc
Summary: This review highlights the importance and versatility of high internal phase emulsions (HIPEs) and the resulting porous polymers (polyHIPEs) in biomedical applications. The focus is on the use of polyHIPEs as scaffolds for biological cell growth and tissue regeneration, along with their preparation methods and interactions with biological systems. Additionally, it touches upon the use of combined techniques and advanced applications in this field.
Article
Chemistry, Analytical
I Dalfen, T. Burger, C. Slugovc, S. M. Borisov, I Klimant
Summary: Optical oxygen sensors based on various immobilized oxygen indicators in microparticles were studied under high hydrostatic pressure, revealing that all porous materials remained stable under elevated pressure. While the actual oxygen concentration did not change with increasing pressure, the sensors showed a significant decrease in calculated oxygen concentration, which was reversible.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Polymer Science
Matthias Mueller, Christine Bandl, Wolfgang Kern
Summary: Straightforward and versatile surface modification, functionalization and coating have become important topics in material sciences. This review provides an overview on photoinitiators covalently coupled to different surfaces and their applications in subsequent photopolymerizations and photocoupling reactions. The paper also discusses the coupling strategies for different surfaces and the concept of surface initiation mediated by photoiniferters (PIMP). The importance of controlled radical polymerization from surfaces is emphasized, along with the use of surface-tethered co-initiators, ATRP initiators, and RAFT agents.
Article
Chemistry, Multidisciplinary
Bettina Schafzahl, Astrid C. Knall, Christian Slugovc
Summary: This study demonstrates the synthesis of pyridazines bearing three different substituents using the iEDDA reaction, and presents the second order rate constants for reactions with different dienophiles.
MONATSHEFTE FUR CHEMIE
(2022)
Review
Polymer Science
Mohammadhossein Sharifian, Wolfgang Kern, Gisbert Riess
Summary: Reducing CO2 emissions is an urgent global priority, and the hydrogen economy offers a long-term solution. Storing hydrogen in polymer-based carriers provides a more compact and safer approach. However, there is currently no optimal hydrogen storage system for all applications.
Article
Polymer Science
Wolfgang Kern, Matthias Mueller, Christine Bandl, Nina Krempl, Markus Kratzer
Summary: There is a wide application field for anti-adhesive and hydrophobic coatings. The addition of a fluorescent marker molecule allows for control of the coating application, wear resistance, and visibility.
Article
Chemistry, Physical
Sebastijan Kovac, Bettina Schafzahl, Nadejda B. Matsko, Katharina Gruber, Martin Schmuck, Stefan Koller, Stefan A. Freunberger, Christian Slugovc
Summary: This work demonstrates the potential of pDCPD-based foams and hierarchically porous carbons as lightweight, tough, and stable matrix materials. The carbon foams exhibit uniform shrinkage, high porosity, and conductivity, while preserving the porous structure and 3D interconnectivity during carbonization. These materials show outstanding performance in Li-O2 batteries.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Katharina Gallas, Dominik Wohlmuth, Zhiquan Li, Aliasghar Ajami, Aleksandr Ovsianikov, Robert Liska, Christian Slugovc
Summary: This study reports the synthesis of two dye-labeled azides through de-symmetrization using a copper (I)-catalyzed alkyne-azide cycloaddition (CuAAC) method. Dansyl derivative and perylene diimide derivative with alkyne functional groups were employed as the fluorescent dyes. The photo-physical properties of these dye dyads were described, and their performance in multi-photon grafting onto polyethylene glycol-based hydrogels was investigated. It was found that the dansyl-conjugated BAC derivative was suitable for multi-photon grafting with lasers operating at 800 nm, while the perylene diimide-bearing dye did not yield the desired result.
MONATSHEFTE FUR CHEMIE
(2023)
Article
Polymer Science
Karin Ratzenboeck, Johanna M. Uher, Susanne M. Fischer, David Edinger, Viktor Schallert, Ema Zagar, David Pahovnik, Christian Slugovc
Summary: One way to obtain recyclable polymeric materials is by incorporating reversible bonds in the polymers. This study investigates the reversibility of the oxa-Michael reaction in simple model systems, linear polymers, and polymer networks, and explores its scope and limitations. The results demonstrate that the retro oxa-Michael reaction of sulfone, acrylate, or acrylonitrile based adducts is fast at elevated temperatures (>100 degrees C) when Bronsted bases, such as KOH, are used as catalysts. Under these conditions, alcohols can be easily exchanged in oxa-Michael adducts within minutes. Furthermore, poly(ether)s derived from oxa-Michael reactions can depolymerize into small fragments in the presence of alcohols and exhibit self-healing properties in networks.
Article
Chemistry, Multidisciplinary
Sebastijan Kovacic, Katharina Gruber, Bernd Fuchsbichler, Martin Schmuck, Christian Slugovc
Summary: In this article, the authors demonstrate the fabrication of thin and macroporous carbon coatings on metal substrates using a combination of emulsion-templating and the doctor-blade method. The resulting carbon coatings retain a highly porous architecture and flexibility. These coatings can be used to create cathodes with high sulfur loadings for use in lithium-sulfur cells, without the need for binders or conductive fillers.
MONATSHEFTE FUR CHEMIE
(2023)
Review
Chemistry, Multidisciplinary
Karin Ratzenboeck, Susanne M. Fischer, Christian Slugovc
Summary: Poly(ethers) are an important class of polymers, which can be formed by ring-opening polymerization, Williamson ether synthesis, or self-condensation of alcohols. The oxa-Michael reaction provides another method to synthesize poly(ethers) with additional functional groups in the polymer backbone. However, research on oxa-Michael polymerization is still limited. In this article, we discuss the principles, synthesis, and preparation of various poly(ethers) and also highlight the challenges and future perspectives of oxa-Michael polymerization.
MONATSHEFTE FUR CHEMIE
(2023)
Review
Materials Science, Multidisciplinary
Lucija Pustahija, Wolfgang Kern
Summary: This article focuses on techniques for modifying the surface of carbon materials produced from sustainable resources, such as pyrolytic carbon. Various methods of functionalizing the carbon surface, including wet and dry oxidation, are discussed. Additionally, alternative chemical modification techniques and the applications of modified carbon materials are presented.
C-JOURNAL OF CARBON RESEARCH
(2023)
Article
Polymer Science
Susanne M. Fischer, Viktor Schallert, Johanna M. Uher, Christian Slugovc
Summary: In this study, we propose a method for preparing crosslinked polymers from off-stoichiometric oxa-Michael formulations, by a self-limiting base catalyzed reaction between difunctional Michael acceptors and substoichiometric amounts of diols, followed by anionic polymerization of the remaining vinyl groups. The properties of the resulting polymers can be easily tuned by varying the amount of diols.
Article
Chemistry, Physical
Susanne M. Fischer, Petra Kaschnitz, Christian Slugovc
Summary: The performance of the strong Lewis base TTMPP in catalyzing oxa-Michael reactions is assessed and compared with other arylphosphines and a Bronsted base. The study demonstrates that TTMPP shows superiority over other arylphosphine based Lewis bases and comparable activity to the benchmark catalyst. TTMPP is also capable of catalyzing oxa-Michael polymerization reactions of diacrylates and diols.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Tobias Burger, Miriam de J. Velasquez-Hernandez, Robert Saf, Sergey M. Borisov, Christian Slugovc
Summary: Core-shell and multivariant metal-organic frameworks of the PCN-224 type, prepared using metal-free and metalated porphyrin building blocks, exhibit efficient gas transport and oxygen quenching. However, the contribution of the phosphorescent component is diminished in all mixed MOFs due to undesirable energy transfer, except for the physical mixture of individual crystals used as a reference.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Karin Ratzenboeck, Mir Mehraj Ud Din, Susanne M. Fischer, Ema Zagar, David Pahovnik, A. Daniel Boese, Daniel Rettenwander, Christian Slugovc
Summary: Using water as a monomer in polymerization reactions is a sustainable strategy. The oxa-Michael polyaddition of water and divinyl sulfone demonstrates high yield polymerization in an interfacial reaction under nucleophilic or base catalysis at room temperature. The resulting polyethersulfone is then applied as a solid polymer electrolyte, showing excellent oxidative stability and conductivity.
