Article
Nanoscience & Nanotechnology
Yachao Zhu, Lea Droguet, Jie Deng, Xuanze Wang, Luming Li, Yannick Dufil, Mathieu Deschannels, Rossukon Jommongkol, Chayaporn Pareseecharoen, Alexis Grimaud, Jean-Marie Tarascon, Olivier Fontaine
Summary: Surface modification was achieved through artificial diazonium grafting, resulting in the formation of a stable hydrophobic layer on the glassy carbon electrode. This layer effectively protected the electrode surface from water molecules while allowing the migration of lithium ions, offering a new strategy for constructing a stable artificial solid-electrolyte interphase (SEI) layer.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Biochemistry & Molecular Biology
Camille Colin, Pierre Levallois, Ugo Botsos-Margerit, Franck Clement, Dodzi Zigah, Stephane Arbault
Summary: It was found that using oxygen plasma exposure can replace traditional polishing procedures for GC electrodes, improving their cyclic voltammetry response and making it close to theoretical values. The plasma effects on the electrodes remained stable for about a week when stored in water, attributed to increased surface energy and hydrophilicity. Additionally, the plasma treatment can remove surface blockades on the electrodes.
BIOELECTROCHEMISTRY
(2023)
Article
Biochemical Research Methods
Miguel Aller Pellitero, Netzahualcoyotl Arroyo-Curras
Summary: Electrochemical, aptamer-based (E-AB) sensors allow reagentless, reversible, and continuous molecular monitoring in biological fluids. However, these sensors suffer from signal losses due to the easy desorption of the sensing materials. In this study, we explored the modification of carbon electrodes to improve the stability of E-AB sensors. We found that electrografting of primary aliphatic amines on carbon surfaces achieved similar monolayer organization and packing densities as alkanethiols on gold. These modified monolayers enabled covalent tethering of DNA aptamers and supported electrochemical sensing with superior stability.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2022)
Review
Biochemistry & Molecular Biology
Szymon Smolka, Katarzyna Krukiewicz
Summary: Recent studies have shown that electrochemical grafting of diazonium salts is an efficient method for forming heterogeneous catalysts. This review aims to evaluate the industrial applicability of diazonium-based catalysts, focusing on their mechanical, chemical, and thermal stability. Various approaches to catalyst production using diazonium salt chemistry have been compared, and the most common deactivation routes of catalysts have been discussed. However, more research is needed to experimentally verify the stability and long-term catalytic performance of diazonium-based catalysts.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Physical
Chunxiao Dong, Li Yang, Cheng Lian, Xiaoling Yang, Yihua Zhu, Hongliang Jiang, Chunzhong Li
Summary: Defective graphene catalysts were synthesized by pyrolyzing a mixture of glucose and carbon nitride, showing higher power density in a primary Zn-air battery compared to commercial Pt/C catalyst. This study presents a facile and low-cost strategy for the preparation of highly active nanocarbon electrocatalysts.
GREEN ENERGY & ENVIRONMENT
(2023)
Article
Chemistry, Physical
Viacheslav Shkirskiy, Eric Levillain, Christelle Gautier
Summary: A new method using small amplitude high frequency AC oscillations at grafting potential for in-situ grafting kinetics of diazonium compounds is outlined, validated by correlation with ex-situ and in-situ measured surface coverages. The approach was demonstrated on different substrates, showcasing its simplicity, speed, and non-destructiveness for exploring grafting kinetics.
Article
Electrochemistry
Quentin Lenne, Vivien Andrieux, Gael Levanen, Jean-Francois Bergamini, Pauline Nicolas, Ludovic Paquin, Corinne Lagrost, Yann R. Leroux
Summary: This study reports the efficient electro-grafting of aryl diazonium salts on carbon surfaces using ethaline as a deep eutectic solvent, demonstrating potential applications. The effects of concentration, deposition time, and potential on electrode blocking behavior and deposited organic film thickness were investigated. Post-functionalization with redox active moieties was also demonstrated on the electro-grafted organic layer.
ELECTROCHIMICA ACTA
(2021)
Article
Multidisciplinary Sciences
Vahe J. Baboomian, Giuseppe Crescenzo, Yuanzhou Huang, Fabian Mahrt, Manabu Shiraiwa, Allan K. Bertram, Sergey A. Nizkorodov
Summary: The viscosity of secondary organic aerosol (SOA) can increase significantly after exposure to UV radiation, potentially leading to increased abundance of aerosols and formation of ice clouds in the atmosphere. This has important implications for air quality, climate prediction, and Earth's energy budget.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Chemistry, Multidisciplinary
Martin Frandsen, Kassem El-Chami, Johan Palmfeldt, Jakob Melgaard Smidt, Maja E. T. Langballe, Alexander Sandahl, Kurt V. Gothelf
Summary: A method for automated solid-phase synthesis of oligo(disulfide)s was developed using thiol removal and thiosulfonate treatment. The oligomers were synthesized as extensions of oligonucleotides on an automated synthesizer, and their sequences were confirmed by MS/MS analysis. The study also demonstrated the release of a coumarin cargo under reducing conditions, suggesting potential applications for drug delivery systems.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Analytical
Cynthia P. McCord, Tugba Ozer, Charles S. Henry
Summary: The optimization of diazonium tosylate salts synthesis and grafting for modification of thermoplastic electrodes (TPEs) successfully developed the first TPE immunosensors for the sensitive detection of C-reactive protein (CRP). Through direct or indirect amine functionalization, the TPE immunosensor platform showed high selectivity and sensitivity against interfering species, with LODs of 2 ng mL(-1) in buffer and 10 ng mL(-1) in spiked serum. This low-cost and robust platform can be easily adapted for other analytes and multiplexed detection.
ANALYTICAL METHODS
(2021)
Article
Chemistry, Multidisciplinary
Zari Tehrani, Hina Yaqub Abbasi, Anitha Devadoss, Jonathan Edward Evans, Owen James Guy
Summary: Electrochemical biosensors using carbon-based electrodes are widely developed for disease detection, with sensitivity depending on the surface coverage of bioreceptor moieties. Different amine precursors have varying surface coverage, affecting the sensitivity of subsequent sensors. The number of cyclic voltammetry cycles used in reduction steps also influences amine coverage and sensor sensitivity.
Article
Chemistry, Inorganic & Nuclear
Xiangtai Zhang, Youming Xu, Lei Wu
Summary: In this study, Ni3N/N-CNT composite was prepared using solid phase synthesis strategy. The composite exhibited impressive oxygen reduction reaction (ORR) activity, as well as excellent oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) performance. The electronic interaction between Ni3N and N-CNT played a crucial role in enhancing the catalytic properties.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Jidi Li, Yuanchao Liu, Sihao Qian, Zhi Geng, Qichao Pan, Lisha Ye, Lianwang Zhang, Jianwen Bao, Yong He, Bo Zhu
Summary: Functionalized graphene can significantly enhance the interfacial strength and dispersion of graphene materials with thermoset resins. A one-pot direct grafting approach for fabricating epoxy-reactive graphene was developed, which allows for easy control of the grafting density. The graphene composites showed improved fracture toughness, flame retardance, and dispersion, indicating the potential of this approach in enhancing the properties of polymer nanocomposites.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Quentin Lenne, Alice Mattiuzzi, Ivan Jabin, Ludovic Troian-Gautier, Jonathan Hamon, Yann R. Leroux, Corinne Lagrost
Summary: A single material electrocatalyst with high activity and durability for both ORR and MOR is a conceptual challenge in designing versatile DMFCs. By using a supramolecular concept, surface-grafted molecular ligands can regulate the reactivity of Pt catalyst, leading to Pt CF3 ${{_{{\rm CF}{_{3}}}}}$ NPs/C with remarkable methanol tolerance, outstanding durability, and chemical stability. This research highlights a promising strategy for tuning interfacial properties, providing a potential solution for the design of DMFC cathodic and anodic compartments.
Review
Chemistry, Multidisciplinary
Abdusalom A. Suleymanov, Kay Severin
Summary: Recent developments have revealed that vinyl and alkynyl triazenes are highly interesting compounds with unique reactivity, enabled by the electron-donating properties of the triazenyl group. These compounds can be prepared in few steps from readily available starting materials, making them a promising area of study in synthetic organic and medicinal chemistry.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
