Article
Polymer Science
Ranush Durgaryan, Narine Durgaryan
Summary: The oxidative condensation of benzidine using potassium peroxydisulfate in acetic acid medium resulted in the synthesis of benzidine dimer, trimer, and polymer for the first time, with a polybenzidine structure composed of benzidinediimine and diphenylene units. Thermal analysis showed high thermostability, with decomposition starting at 300 degrees C and significant weight retention at 600 degrees C. The conductivities of the polymer and trimer exhibited semiconductor behavior, increasing up to 10(-4) Sm/cm after doping.
Article
Infectious Diseases
Tooba Jabri, Naveed Ahmed Khan, Zinb Makhlouf, Noor Akbar, Jasra Gul, Muhammad Raza Shah, Ruqaiyyah Siddiqui
Summary: The emergence of drug-resistant bacterial strains is a major concern, and finding new antibacterials or enhancing the potency of existing medications using nanotechnology is necessary. In this study, the antibacterial efficacy of two-dimensional glucosamine functionalized graphene-based nanocarriers loaded with sulfamethoxazole and ethacridine lactate was examined. The nanoformulations demonstrated significant antibacterial properties against both Gram-negative and Gram-positive bacteria, and showed limited toxicity effects on human cells.
Article
Engineering, Environmental
Fengying Li, Yanjun Ma, Lei Chen, Hongxuan Li, Huidi Zhou, Jianmin Chen
Summary: Aniline oligomer-functionalized graphene oxide (AOFG) and reduced graphene oxide (AOFrG) were prepared and incorporated into polyurethane (PU) to obtain wear-resistant and anticorrosive composite coatings. The functional modification significantly improved the dispersion of graphene oxide (GO) and reduced graphene oxide (rGO) in organic solvents, enhancing the mechanical and thermal properties of PU prominently. The introduction of AOFG and AOFrG also led to better friction durability, lubrication, and anticorrosive performance, with AOFG showing the most outstanding enhancement effect.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Chemical
Ran Lei, Zhiyuan Zha, Zhan Hao, Jixiao Wang, Zhi Wang, Song Zhao
Summary: OT-IP technique was used to fabricate COFs/PSf composite membranes with superior permeability and rejection properties, enabling scalable production and application.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Polymer Science
Alexander Schmitt, Negar Kazerouni, Grace E. Castillo, Barry C. Thompson
Summary: We synthesized a series of block copolymers with nonconjugated pendant electroactive polymer (PCzETPMA) and polystyrene (PS) block through an anionic living polymerization. By controlling the molar masses, PS to PCzETPMA block ratios, and tacticities of the PCzETPMA blocks, we were able to increase the hole mobilities of the resulting copolymers. The highest hole mobility achieved was 2.33 x 10(-5) cm(2)/V center dot s for the copolymer with the highest molar mass and dominant isotactic PCzETPMA block.
Article
Polymer Science
Kangkang Li, Lei Cui, Yixin Zhang, Zhongbao Jian
Summary: The direct copolymerization of olefins with polar monomers to produce functionalized polyolefins, particularly those with amide functions, has been a challenge. However, by utilizing compounds with high ring strain and an amide moiety in ethylene copolymerization, high amide incorporation, molecular weights, and catalytic activities can be achieved. The resulting amide-functionalized polyethylenes can undergo facile post-transformations to produce polyethylenes with diverse functionalities, such as hydrogen bond-containing, difunctionalized, and water-soluble ammonium-functionalized polyethylenes, which exhibit antibacterial properties.
Article
Polymer Science
Doebner Von Tumacder, Islam M. Minisy, Oumayma Taboubi, Patrycja Bober
Summary: The presence of organic dyes in the frozen-state polymerization of pyrrole has been found to significantly enhance the electroactivity and capacitance performance of polypyrrole (PPy). The PPy prepared under frozen conditions showed improved electrochemical stability and demonstrated excellent energy storage characteristics in a supercapacitor device.
Article
Biotechnology & Applied Microbiology
Yadong Sun, Jiachi Teng, Yi Kuang, Shengxiang Yang, Jiquan Yang, Hongli Mao, Zhongwei Gu
Summary: The functionalized carbon nanotubes have improved dispersibility and conductivity, making them suitable for use in shape memory polymers with potential applications in various fields.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Polymer Science
Jiawei Chen, Wenbing Wang, Yao Pan, Dan Peng, Yougui Li, Chen Zou
Summary: In this study, direct copolymerization of plant oil-based copolymer monomers with ethylene was achieved using a dienyl phosphoribosulfonyl palladium catalyst (PO-Pd). Addition, ureido-pyrimidinone (UPy) functionalization was performed using the hydroxyl group of the polymer. The incorporation of biomass groups effectively modifies the surface and mechanical properties of the copolymers, and these newly developed polymers are ideal tougheners for gutter oil due to their excellent tunability of the self-complementary hydrogen bonding network (UPy).
Article
Polymer Science
Arijit Ghorai, Riddhi Kamble, Susanta Banerjee
Summary: A new diphenylphosphine oxide based dialkyne, POALK, was synthesized under mild conditions and used to prepare fluorinated sulfonated polytriazoles via click polymerizations with other comonomers. The resulting sulfonated polymers showed exceptional thermal, mechanical, and thermomechanical stability, along with high proton conductivity. The presence of triarylphosphine oxide units in the polymers contributed to slowing down peroxide radical attacks and facilitating proton transportation through ionic nanochannels.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Chemistry, Analytical
Qiong Hu, Jianwen Wan, Yilin Luo, Shiqi Li, Xiaojing Cao, Wenxing Feng, Yiyi Liang, Wei Wang, Li Niu
Summary: Polymers have great potential as carriers for signal tags in amplified detection. This study presents a polysaccharide-amplified method for electrochemical detection of a specific DNA target. The method involves attaching carboxyl group containing polysaccharides to a peptide nucleic acid capture probe, followed by the decoration of polysaccharide chains with electroactive ferrocene signal tags. The method shows high sensitivity, selectivity, and cost-effectiveness.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Danyon M. Fischbach, Katharina A. Krstic, Lawrence R. Sita
Summary: The living coordinative copolymerization of 1-alkenes with 4-aryl-1,6-heptadienes, both with and without a reversible chain transfer agent, allows for the production of functionalized polyolefins with various end-groups and functional groups. The non-conjugated diene comonomers can be easily obtained from a range of aryl carboxaldehyde precursors. These results provide a new platform for exploring functionalized polyolefins on a larger scale.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Polymer Science
Chiwon Hwang, Jong-Ho Back, Dowon Ahn, Hyun-Jong Paik, Wonjoo Lee, Youngchang Yu
Summary: UV-responsive pressure-sensitive adhesives were successfully achieved by utilizing the ring-opening reactions of N-carbonyl aziridine radicals. The post-modification of carboxylic acid-functionalized acrylic PSAs was characterized by spectroscopic analysis and their adhesion performance under UV light irradiation was evaluated, showing potential for academic research and mass-production industry applications.
Article
Polymer Science
Farah Zayanah Ahmad Zulkifli, Moeka Ito, Takahiro Uno, Masataka Kubo
Summary: A novel pi-conjugated polymer based on cyclopentadithiophene and poly(4,4 ']-(((4H-cyclopenta[2,1-b:3,4-b']dithiophene-4,4-diyl)bis(ethane-2,1-diyl))bis(oxy))bis(4-oxobutanoic acid)) was prepared and found to generate hydroxyl radicals in water, serving as a promising candidate for metal-free and 100% organic heterogeneous photocatalysts.
Article
Biochemistry & Molecular Biology
Alain Salvador Conejo-Davila, Carlos Rafael Casas-Soto, Eider Pedro Aparicio-Martinez, David Chavez-Flores, Victor Hugo Ramos-Sanchez, Rocio Berenice Dominguez, Velia Carolina Osuna, Anayansi Estrada-Monje, Alejandro Vega-Rios, Erasto Armando Zaragoza-Contreras
Summary: In this research, a brush-like polyaniline (BL PAni) was developed to overcome the limitations of conventional polyaniline (PAni) in processability and dedoping at high pH. The synthesis of BL PAni involved grafting PAni chains using different polymerization methods, and the structure was confirmed by spectroscopic techniques. The thermal properties were analyzed, and the BL PAni showed absorption properties in the visible and near-infrared regions, as well as resistance to dedoping at high temperature and neutral pH. The absorption range and electroactivity were studied, highlighting the potential applications of BL PAni in various fields.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Electrochemistry
Bojana Nedic Vasiljevic, Aleksandar Z. Z. Jovanovic, Slavko V. V. Mentus, Natalia V. V. Skorodumova, Igor A. A. Pasti
Summary: Surface modification with rhodium through galvanic displacement significantly improves the catalytic activity of cobalt for hydrogen and oxygen evolution reactions in alkaline media. The overpotential for hydrogen and oxygen generation is reduced by 0.16 V and 0.06 V, respectively, after only 20 seconds of galvanic displacement. Density Functional Theory calculations indicate that the reactivity of the Rh-modified Co(0001) surface is different from that of the clean Co(0001) surface.
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2023)
Article
Chemistry, Physical
Marjetka Savic, Aleksandra Janosevic Lezaic, Nemanja Gavrilov, Igor Pasti, Bojana Nedic Vasiljevic, Jugoslav Krstic, Gordana Ciric-Marjanovic
Summary: Composites of N,O-doped carbon/ZnO/ZnS and N,O-doped carbon/ZnO (C-(MOF-5/PANI)) were synthesized by the carbonization of MOF-5/PANI composites. These composites were comprehensively characterized and exhibited high S-BET, electrical conductivity, and specific capacitance. Acid etching treatment further improved the surface area and capacitance, making them promising electrode materials for supercapacitors.
Article
Chemistry, Physical
Sanjin J. Gutic, Dino Metarapi, Aleksandar Z. Jovanovic, Goitom K. Gebremariam, Ana S. Dobrota, Bojana Nedic Vasiljevic, Igor A. Pasti
Summary: In order to efficiently replace fossil fuels and address the growing energy crisis, hydrogen production has become a focus. This study utilized Kinetic Monte Carlo simulations to demonstrate that hydrogen evolution reaction (HER) can be enhanced by hydrogen spillover to the support under certain conditions. Based on these findings, a series of reduced graphene-oxide-supported catalysts were synthesized and compared with pure metals for HER activity in alkaline media. The results showed that the support had a negative effect on Ag, Au, and Zn, but enhanced HER activity for Pt, Pd, Fe, Co, and Ni. The study provides insights into metal-support interface engineering for effective HER catalysts and guidelines for selecting novel catalyst-support combinations for electrocatalytic hydrogen production.
Article
Biochemistry & Molecular Biology
Milica Milutinovic, Dura Nakarada, Jelena Bozunovic, Milos Todorovic, Uros Gasic, Suzana Zivkovic, Marijana Skoric, Durda Ivkovic, Jelena Savic, Nina Devrnja, Neda Anicic, Tijana Banjanac, Milos Mojovic, Danijela Misic
Summary: This study provides a characterization of the redox processes associated with the ripening of bittersweet berries for the first time. Reactive oxygen species were measured using Electron Paramagnetic Resonance Spectroscopy and Imaging, and the metabolic profiling of antioxidants and antioxidant enzyme activity was assessed. Changes in antioxidants and oxidation processes occurred during the transition from green to ripe stage. The skin of bittersweet berries had the highest antioxidant potential, and the enzymatic antioxidant system played a critical protective role. The EPRI methodology was presented to assess the redox status of fruits and discriminate between different tissues. The intracellular reoxidation of nitroxide probe 3CP was observed for the first time and proposed as an indicator of oxidative stress during ripening. The noninvasive EPRI technique has the potential for broader application in studying redox processes in fruits and other oxidative stress-related circumstances.
Article
Nanoscience & Nanotechnology
Mila Krstajic N. Pajic, Ana S. Dobrota, Anca Mazare, Sladana Durdic, Imgon Hwang, Natalia V. Skorodumova, Dragan Manojlovic, Rastko Vasilic, Igor A. Pasti, Patrik Schmuki, Uros Lacnjevac
Summary: This study reveals that the surface effects of hydrogenated TiO2 nanotube arrays can convert Os, an unexplored platinum group metal, into a highly active electrocatalyst for the hydrogen evolution reaction (HER). The optimized Os@TNT composite exhibits low overpotential and stable performance in acidic medium, offering new possibilities for the fabrication of cost-effective PGM-based catalysts.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Ammar Al-Hamry, Tianqi Lu, Haoran Chen, Anurag Adiraju, Salem Nasraoui, Amina Brahem, Danica Bajuk-Bogdanovic, Saddam Weheabby, Igor A. Pasti, Olfa Kanoun
Summary: This study investigates the relative humidity sensor properties of graphene oxide (GO) and graphene oxide/multiwalled nanotubes (GO/MWNTs) composites. Composite sensors were fabricated using direct laser scribing and characterized using various spectroscopies and microscopy techniques. The results show that GO/MWNT-based humidity sensors are more stable and repeatable, and they have faster response/recovery times compared to GO sensors. The introduction of GO/MWNT hybrid and laser direct writing proves to be advantageous in producing stable structures and sensors.
Article
Agronomy
Bojana Bozilovic, Bogdan Nikolic, Hadi Waisi, Jelena Trifkovic, Vladimir Dodevski, Bojan Jankovic, Sanja Krstic, Milos Mojovic
Summary: Brassinosteroids (BRs) are plant hormones that regulate plant physiological and developmental processes. The effects of 24-epibrassinolide (24-EBL) on maize seedling growth were investigated, and the results showed that moderate concentrations of 24-EBL have a beneficial influence on seedling growth.
Article
Food Science & Technology
Vedran Milankovic, Tamara Tasic, Milica Pejcic, Igor Pasti, Tamara Lazarevic-Pasti
Summary: Coffee is a popular beverage, but the disposal of spent coffee grounds (SCGs) can harm the environment. This study explored the interaction between SCGs and organophosphate pesticides, specifically malathion and chlorpyrifos. The results showed that SCGs can effectively remove these pesticides from water and fruit extracts without producing toxic byproducts.
Article
Food Science & Technology
Tamara Tasic, Vedran Milankovic, Katarina Batalovic, Stefan Breitenbach, Christoph Unterweger, Christian Fuerst, Igor A. Pasti, Tamara Lazarevic-Pasti
Summary: This study shows that carefully tuned viscose-derived activated carbon fibers can efficiently remove pesticides from liquid samples, even in complex matrices. The selected materials are not affected by complex matrices of real samples and can be regenerated multiple times without performance losses. Adsorptive removal of food contaminants can effectively improve food safety and quality, unlike other methods that negatively affect the nutritional value of food products. Data-based models can guide the synthesis of novel adsorbents for desired applications in food processing.
Article
Engineering, Biomedical
Maja Rankovic, Anka Jevremovic, Aleksandra Janosevic Lezaic, Aleksandar Arsenijevic, Jelena Rupar, Vladimir Dobricic, Bojana Nedic Vasiljevic, Nemanja Gavrilov, Danica Bajuk-Bogdanovic, Maja Milojevic-Rakic
Summary: Acridine and its derivatives (9-chloroacridine and 9-aminoacridine) supported on zeolite Y were investigated for their potential as delivery systems for anticancer agents. Drug loading was successfully achieved on the zeolite surface, with the highest drug release observed for zeolite-supported 9-aminoacridine. The cytotoxicity of the supported acridines on colorectal carcinoma cells was improved by the zeolite carrier, especially for zeolite-impregnated 9-aminoacridine.
JOURNAL OF FUNCTIONAL BIOMATERIALS
(2023)
Article
Chemistry, Analytical
Saddam Weheabby, Zhenyn Wu, Ammar Al -Hamry, Igor A. Pasti, Adiraju Anurag, Doreen Dentel, Christoph Tegenkamp, Olfa Kanoun
Summary: This study demonstrates the voltammetric sensing of paracetamol using silver nanoparticles and carboxylated multi-walled carbon nanotubes on a screen-printed carbon electrode. The sensor shows effective sensing potential with a low detection limit under optimal conditions. Experimental and computational studies were conducted to support the findings. The proposed method shows promising applications for determining paracetamol in environmental and pharmaceutical samples.
MICROCHEMICAL JOURNAL
(2023)
Article
Chemistry, Physical
Goitom K. Gebremariam, Aleksandar Z. Jovanovic, Igor A. Pasti
Summary: This study evaluates the HER kinetic parameters of different metals in various electrolytes, showing that the shape of HER volcano curves remains largely unchanged in different electrolytes. The presence of surface oxide can have both positive and negative effects on HER kinetics, depending on the metal-electrolyte combination. The study also provides a comprehensive overview of HER kinetic data from diverse literature sources, offering practical insights for the development of new catalytic materials and optimization of electrolyte formulations for enhancing HER.
Article
Chemistry, Multidisciplinary
Daniela Neumueller, Lidija D. Rafailovic, Aleksandar Z. Jovanovic, Natalia V. Skorodumova, Igor A. Pasti, Alice Lassnig, Thomas Griesser, Christoph Gammer, Juergen Eckert
Summary: Highly efficient non-noble metal catalysts are crucial for hydrogen generation through electrolysis, and the synthesis of catalytic heterostructures containing established Ni with surface NiO, Ni(OH)(2), and NiOOH domains has shown promising results. This study investigates the intrinsic catalytic activity of pure Ni and the impact of partial electrochemical oxidation of magnetron sputter-deposited Ni surfaces through various experimental techniques and simulations. The results demonstrate that surface oxidation increases the intrinsic hydrogen evolution reaction (HER) activity of nickel and improves catalyst durability.
Article
Polymer Science
Anka Jevremovic, Marjetka Savic, Aleksandra Janosevic Lezaic, Jugoslav Krstic, Nemanja Gavrilov, Danica Bajuk-Bogdanovic, Maja Milojevic-Rakic, Gordana Ciric-Marjanovic
Summary: The environmental application of carbonized composites of Zn-containing metal-organic framework MOF-5 and polyaniline (PANI) was investigated. The composites exhibited excellent adsorption performance for pesticides and dyes. The presence of O/N functional groups in the composites was crucial for the adsorption of nitrogen-rich pollutants. Furthermore, the composites showed better adsorption ability than carbonized PANIs and comparable or better adsorption ability than carbonized MOF-5.
Article
Chemistry, Applied
Xiaodan Wu, Zihan Wang, Guansong Shao, Bingyang Qin, Ying Wang, Tao Wang, Zhiguo Liu, Yujie Fu
Summary: In this study, a new type of cellulose-based ionic imprinting adsorbent was developed for the selective removal of cobalt ions. The adsorbent exhibited excellent adsorption performance, high cycling stability, and preferential selectivity for cobalt ions. The simple preparation method and promising application prospects make it a promising candidate for water treatment.
REACTIVE & FUNCTIONAL POLYMERS
(2024)
Article
Chemistry, Applied
Chandirasekar Shanmugam, Vanitha Marimuthu, Nagappan Rajendiran
Summary: In this study, monodispersed gold and silver nanoparticles were synthesized using cholic acid functionalized star poly(DL-lactide) as a capping and reducing agent. The synthesized materials were found to be effective heterogeneous catalysts for the reduction reaction.
REACTIVE & FUNCTIONAL POLYMERS
(2024)
Article
Chemistry, Applied
Bianca-Iulia Ciubotaru, Mirela-Fernanda Zaltariov, Mihaela Dascalu, Adrian Bele, Alexandra Bargan, Maria Cazacu
Summary: Porous networks were obtained using polysiloxanes pendant functionalized with aminopropyl groups. The addition of certain substances, such as ammonium bicarbonate and acetic acid, promoted the porosity and covalent cross-linking of the polymer. The resulting materials exhibited high dielectric permittivity and significant electrical output signal when subjected to compression, making them suitable for capacitive pressure sensors.
REACTIVE & FUNCTIONAL POLYMERS
(2024)
Article
Chemistry, Applied
Mohamed A. Zein, Basim H. Asghar, Abdulaziz M. Almohyawi, Norah F. Alqahtani, Ahmed Alharbi, J. Alkabli, Reda F. M. Elshaarawy, Lamia A. Ismail
Summary: In this study, new amphiphilic chitosan-thyme extract-nanosilver nanocomposites were prepared, which synergistically inhibited bacterial biofilm formation and bacterial proliferation. The nanocomposites disrupted bacterial cell membranes, causing cell death, and prevented biofilm formation. In addition, the nanocomposites exhibited good biocompatibility, making them potential candidates for biomedical applications.
REACTIVE & FUNCTIONAL POLYMERS
(2024)
Review
Chemistry, Applied
Norah F. Alqahtani
Summary: This review explores the potential of Imidazolium-based ionic liquids (ImILs) in improving the solubility, stability, and functionality of chitosan, and provides an overview of the types and preparation methods of functionalized imidazolium ionic liquids (FImILs). Additionally, it discusses the various opportunities offered by FImIL-chitosan derivatives.
REACTIVE & FUNCTIONAL POLYMERS
(2024)
Article
Chemistry, Applied
Olesya N. Zabegaeva, Alexey F. Kosolapov, Sergei L. Semjonov, Mariam G. Ezernitskaya, Egor S. Afanasyev, Ivan A. Godovikov, Alexander Chuchalov, Dmitriy A. Sapozhnikov
Summary: Polyimides are commonly used as primary protective coatings for optical fibers in high-temperature applications. However, the manufacturing process is complicated due to certain drawbacks. This study shows the potential use of polyamide-imides as highly reliable protective coatings for optical fibers.
REACTIVE & FUNCTIONAL POLYMERS
(2024)
Article
Chemistry, Applied
Luis Miguel Nunez Tapia, Pascal Thebault, Laurent Bischoff, Alain Ledoux, Florian Defontaine, Olivier Lesouhaitier, Fabrice Burel
Summary: A water soluble cationic bis-cyclocarbonate was prepared through a three steps procedure, and non-isocyanate polyurethanes were prepared in acetonitrile with high yields. The resulting materials exhibited good thermal properties and hydrophilic properties. The polyurethane thermoset showed high inhibition towards bacteria, and the bis-cyclocarbonate oligomer was found to be harmless to organisms.
REACTIVE & FUNCTIONAL POLYMERS
(2024)
