Article
Chemistry, Multidisciplinary
Jaewoong Lim, Seonghwan Lee, Hyeonbin Ha, Junmo Seong, Seok Jeong, Min Kim, Seung Bin Baek, Myoung Soo Lah
Summary: This study reports for the first time the covalent post-synthetic modification of amine-tagged defective Ni-MOF-74, resulting in a highly efficient Pd-II-incorporated Ni-MOF-74 catalyst for the Suzuki-Miyaura cross-coupling reaction. This strategy is also applicable to the covalent modification of amine-tagged defective Ni-2(DOBPDC), an expanded analogue of MOF-74.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Christine M. Montone, Michael R. Dworzak, Glenn P. A. Yap, Eric D. Bloch
Summary: Recent advances in metal-organic frameworks (MOFs) and porous coordination cages (PCCs) have resulted in their widespread use due to their tunable properties and large surface areas. In this paper, the surface attachment of MOFs and cages using click chemistry, alkylation reactions, and electrostatic methods is explored. The results demonstrate the feasibility of surface attachment for porous cages and offer versatile approaches for functionalizing surfaces in various applications.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Yoogyeong Kim, Yeongkyun Son, Sungjun Bae, Tae-Hyun Kim, Yuhoon Hwang
Summary: In this study, the chromate adsorption efficacy of MgAl-layered double hydroxide (LDH) was investigated. The results showed that Cl-intercalated LDH had a higher adsorption capacity compared to CO3-LDH, and fast chromate adsorption occurred within a short period of time. The crystal structure and morphology of LDH were well preserved after the adsorption, with most of the chromate ions being adsorbed on the surface. Additionally, LDH exhibited a high removal efficiency in practical applications.
APPLIED CLAY SCIENCE
(2022)
Article
Chemistry, Physical
Se-Young Cho, Yoodong Chang, Song-Ho Byeon
Summary: In this study, L-ascorbate was incorporated into layered yttrium hydroxide, resulting in a partially interdigitated bilayer structure with high loading capacity and density of L-ascorbate. This arrangement enhanced the durability of L-ascorbate against light and oxidation. The release of L-ascorbate could be described by a first-order model in a phosphate buffer solution. Furthermore, when yttrium hydroxide was doped with Tb3+ activator, the absorbed UV light energy of L-ascorbate was efficiently transferred to Tb3+, resulting in strong green emission.
APPLIED CLAY SCIENCE
(2023)
Article
Biotechnology & Applied Microbiology
Shiyu Chen, Scott Lovell, Sumin Lee, Matthias Fellner, Peter D. Mace, Matthew Bogyo
Summary: A phage display method was developed to screen for covalent inhibitors that bind to protein targets by introducing a reactive linker to form cyclic peptides and an electrophilic 'warhead' to react with target nucleophiles. This approach identified cyclic peptides that irreversibly inhibited cysteine protease and serine hydrolase with high specificity and potency. It enables rapid, unbiased screening to identify new classes of highly selective covalent inhibitors for diverse molecular targets.
NATURE BIOTECHNOLOGY
(2021)
Article
Chemistry, Physical
Yiming Huang, Zhe Liu, Arixin Bo, Xiao Tang, Wayde Martens, Liangzhi Kou, Yuantong Gu, Gabriela Carja, Huaiyong Zhu, Sarina Sarina
Summary: Highly effective and selective removal of As(V) was achieved using Mg-Al Layered Double Hydroxide modified by sulphur species (LDH-S). LDH-S exhibited an adsorption capacity for As(V) that was 715% higher than pristine LDH. The adsorbent showed high tolerance to competitive anions and demonstrated potential in continuous flow applications.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Environmental
Chunyan Li, Xin Li, Huiqin Wang, Pengwei Huo, Yan Yan, Xinkun Wang
Summary: By inducing partial phosphating on NiGa-LDH, the derived Ni2P/NiGa2O4/NiGa-LDH structure effectively improves the capacitance and charge/discharge speed of supercapacitors, while preserving the layered structure of LDHs and reducing the charge transfer impedance. Additionally, the hybrid supercapacitor (HSCs) composed of Co3O4-C negative electrode and Ni2P/NiGa2O4/NiGa-LDH positive electrode demonstrates excellent energy density and long-term stability under high power density.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Ana Caroline Reis Meira, Joao Vitor Gehlen Zago, Bruna Ghellere Tremarin, Daniela Zambelli Mezalira, Ana Cristina Trindade Cursino, Alesandro Bail, Rodrigo Leonardo de Oliveira Basso, Renata Mello Giona
Summary: A magnetic magnesium-aluminum layered double hydroxide (Mag-MgAl) was prepared and modified to enhance its adsorption capacity for antibiotics and dyes. The modification with surfactant sodium dodecyl sulfate (SDS) improved the adsorption of cationic contaminants, while the original adsorbent only removed anionic contaminants. The results suggest that the surface of the composite can be adjusted to modulate the behavior of the adsorbent toward organic contaminants.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Agricultural Engineering
Linhan He, Ruiqing Ren, Liuliu Wang, Jingxuan Zhou, Kaili Ling, Jing Li, Songwu Chen, Yao Chen
Summary: In this study, a metal-organic framework (MOF) was grown on a wood surface to generate a nanoscale layered double hydroxide (LDH) for wood dyeing. The LDH formation was achieved through a hydrolytically induced exchange process between the MOF and hydroxide ions. The modified wood surface exhibited a uniform light green color and excellent UV light aging and water resistances. This method is mild, environmentally friendly, and can be applied to other types of wood.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Review
Pharmacology & Pharmacy
Marko Pavlovic, Adel Szerlauth, Szabolcs Murath, Gabor Varga, Istvan Szilagyi
Summary: Layered double hydroxides (LDHs) have great potential for (bio)medical applications due to their layered morphology, anion exchanging property, and facile surface modification with biopolymers. This review focuses on the advantages of polymer adsorption on LDH surfaces and its effect on the colloidal stability of dispersions. The biocompatibility and biomedical applications of LDH-biopolymer composite materials are discussed, and future research directions are suggested.
ADVANCED DRUG DELIVERY REVIEWS
(2022)
Article
Nanoscience & Nanotechnology
Rita Tilmann, Corinna Weiss, Conor P. Cullen, Lisanne Peters, Oliver Hartwig, Laura Hoeltgen, Tanja Stimpel-Lindner, Kathrin C. Knirsch, Niall McEvoy, Andreas Hirsch, Georg S. Duesberg
Summary: Non-covalent functionalization of layered 2D materials is essential for modifying and fully utilizing their properties. This study presents a facile method for selective formation of self-assembled monolayers on transition metal dichalcogenides, providing detailed information beyond traditional surface analysis techniques. The highly selective organic solution functionalization opens up a pathway for controllable, versatile functionalization of layered materials, offering great potential for passivation, tuning of properties, and applications in optics, electronics, and sensing.
ADVANCED ELECTRONIC MATERIALS
(2021)
Article
Chemistry, Inorganic & Nuclear
Sandeep Kumar Dey, Beatriz Gil-Hernandez, Vivekanand V. Gobre, Dennis Woschko, Sarvesh S. Harmalkar, Firdaus Rahaman Gayen, Biswajit Saha, Rajib Lochan Goswamee, Christoph Janiak
Summary: In this study, a second-generation hydrogen bond donor (HBD) anion receptor with an inner amide cavity and an outer urea cavity was developed. This receptor showed selective and efficient extraction of arsenate (AsO43-) from water, even in the presence of competitive oxoanions and halides. The X-ray structure analysis revealed the encapsulation of AsO43- in a pi-stacked dimeric capsular assembly of the receptor, demonstrating the successful recognition of pentavalent AsO43- trianion by the HBD receptor.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Masafumi Nomi, Masashi Morita, Atsushi Kondo, Kazuyuki Maeda
Summary: The interlayer silylation of a layered silicate H-RUB-18 using a new aromatic silylating reagent containing a phosphonic acid group (4-phosphonophenylsilane: PPS) resulted in a solid acid H-PPS-RUB-18, which was exfoliated into single-layer nanosheets with surface acidic properties. Control of the interlayer spacing of modified RUB-18 promoted the catalytic reaction of ketones.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Yanli Ji, Lin Sun, Yao Chen, Hongqiang Qin, Weimin Xuan
Summary: This article introduces a covalent binder for the selective recognition of protein crotonylation. By proximity-induced crosslinking, CobB, a bacterial sirtuin, was modified to react selectively with crotonylated sites. The covalent binder has been successfully used to recognize crotonylated proteins in histone samples and fixed cells.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Jaejung Song, Je Min Yu, Jang Hyuk Ahn, Hyeonjin Cho, Jiyeon Oh, Yoon Seo Kim, Jieun Kim, Myohwa Ko, Seong-hun Lee, Tae Joo Shin, Hu Young Jeong, Changduk Yang, Jun Hee Lee, Ji-Wook Jang, Seungho Cho
Summary: The importance of hydrogen peroxide continues to rise globally. The oxygen reduction reaction (ORR) towards the 2e(-) pathway to form H2O2 is crucial for high productivity. However, existing catalysts made of carbon-containing materials have low stability, hindering their commercial applicability. In this study, layered double hydroxides (LDHs) are used as inorganic matrices for the first time. The developed LDH catalyst exhibits near-100% 2e(-) ORR selectivity and stably produces H2O2 with a high concentration.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Electrochemistry
Kensaku Nagasawa, Issei Matsuura, Yoshiyuki Kuroda, Shigenori Mitsushima
Summary: The study introduces a new evaluation method for powder oxide electrocatalysts using an alkaline electrolyte, which can obtain intrinsic catalyst activity without interference from gas generation. The combination of forced-flow method and time-zero analysis provides an accurate measurement of kinetic current.
Article
Electrochemistry
Kensaku Nagasawa, Li Kunpeng, Yu Takenaga, Yoshiyuki Kuroda, Shigenori Mitsushima
Summary: In this study, a highly accurate catalyst evaluation method was proposed by improving the time-zero analysis. The method can accurately evaluate the kinetic activity of gas evolution powder catalysts.
Article
Chemistry, Inorganic & Nuclear
Keisuke Muramatsu, Mina Jimba, Yumiko Yamada, Hiroaki Wada, Atsushi Shimojima, Kazuyuki Kuroda
Summary: This study reports the anisotropic crystal growth of β-Ni(OH)(2) along the stacking direction using bidentate amine ligands, and reveals the influence of ligand molar ratio, complex concentration, and stability constants on crystal growth.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Ashraf Abdel Haleem, Jinlei Huyan, Kensaku Nagasawa, Yoshiyuki Kuroda, Yoshinori Nishiki, Akihiro Kato, Takaaki Nakai, Takuto Araki, Shigenori Mitsushima
Summary: This study experimentally and theoretically investigated the reverse current phenomenon that occurs after shutdown in alkaline water electrolyzers coupled with intermittent renewable energy sources. It was found that the potential of the electrodes on either side of the bipolar plate changes according to the amount of reverse charge flowing through the plate during shutdown. The study also uncovered the effects of operating parameters and electrode materials on the reverse current phenomenon. The findings have implications for adapting alkaline water electrolyzers to dynamic operation.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Inorganic & Nuclear
Taiki Hayashi, Nanako Murase, Naoto Sato, Koki Fujino, Natsuhiko Sugimura, Hiroaki Wada, Kazuyuki Kuroda, Atsushi Shimojima
Summary: In this study, a new class of inorganic-organic hybrid ionic liquids was prepared by modifying a D4R-type germoxane compound. The resulting products exhibited liquid behaviors and high thermal stability, and showed affinity for both hydrophilic and hydrophobic substances. Density functional theory calculations revealed the advantages of D4R-type germoxane for the creation of ionic liquids.
Article
Electrochemistry
Hayata Ikeda, Ryuta Misumi, Yoshinori Nishiki, Yoshiyuki Kuroda, Shigenori Mitsushima
Summary: This study reports a simple method to promote bubble detachment from an electrode surface and reduce the overpotential of the oxygen evolution reaction in alkaline water electrolysis (AWE). By adding tert-butyl alcohol (TBA), the ohmic resistance and diffusion resistance induced by bubbles attached to the electrode surface were alleviated, resulting in a drastic reduction in overpotential at high current densities. The tertiary alcohol effect was stable over several hours and did not produce any detectable decomposition products.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Analytical
Kensaku Nagasawa, Yuya Sugita, Antonio Atienza-Marquez, Yoshiyuki Kuroda, Shigenori Mitsushima
Summary: Toluene-methylcyclohexane organic hydride is a promising carrier for hydrogen transport and storage. TL direct electrohydrogenation electrolyzers based on solid polymer electrolyte membrane technology have higher energy efficiency compared to conventional TL hydrogenation. Mass transfer in the catalyst layer is crucial for the performance of these devices.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Eduardo B. B. Ferreira, Marco Gibaldi, Ryuki Okada, Yoshiyuki Kuroda, Shigenori Mitsushima, Gregory Jerkiewicz
Summary: In this study, a facile and tunable hydrothermal method was developed for the preparation of Ni-based layered double hydroxide nanoparticles (LDHNPs) as high-performance and durable catalysts for anion exchange membrane water electrolysis. The LDHNPs served as building blocks for mesoporous mixed metal oxides (MMOs) and showed excellent performance and long-term stability in the oxygen evolution reaction. This versatile method can also be extended to the preparation of platinum group metal-free electrocatalysts for other reactions.
Article
Chemistry, Physical
Kazuaki Oda, Yoshiyuki Kuroda, Shigenori Mitsushima
Summary: In bipolar-type alkaline water electrolysis, repeated potential changes degrade electrocatalysts due to the generation of reverse current. This study investigates the discharge capacity of various transition metal-based electrocatalysts to determine their effects on reverse current and durability. It is found that the discharge capacities are proportional to the surface area for most cases. The increase in capacity is due to the dissolution and recrystallization of nickel and/or cobalt into metal hydroxides.
Article
Chemistry, Multidisciplinary
Masakazu Koike, Isabel Grosskreuz, Yusuke Asakura, Ritsuro Miyawaki, Hermann Gies, Hiroaki Wada, Atsushi Shimojima, Bernd Marler, Kazuyuki Kuroda
Summary: A silica zeolite RWZ-1 with a very high framework density has been successfully synthesized, bridging the gap between zeolites and dense silica polymorphs. It exhibits a 1D micropore system with high thermal stability and slight negative thermal expansion, contributing to the advancement of microporous high-density silica/silicate research.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Materials Science, Ceramics
Yuta Hattori, Taiki Hayashi, Takuya Hikino, Ryuta Miwa, Yosuke Oka, Koki Fujino, Naoto Sato, Takamichi Matsuno, Hiroaki Wada, Kazuyuki Kuroda, Atsushi Shimojima
Summary: In this study, the controlled assembly of cage oligosiloxane building blocks was achieved by intermolecular hydrogen bonding and hydrophobic interactions. The self-assembly of a cage siloxane molecule led to the formation of a molecularly and mesoscopically ordered structure. Cross-linking of the assembled solids was then achieved by silylation. This approach enables the creation of hierarchically ordered siloxane-based materials by molecular design.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Mai Suzuki, Taiki Hayashi, Takuya Hikino, Masafumi Kishi, Takamichi Matsuno, Hiroaki Wada, Kazuyuki Kuroda, Atsushi Shimojima
Summary: Spatiotemporal control of the healing of a polysiloxane material is achieved using a cleavable cage compound encapsulating a fluoride ion (F-). A self-healing siloxane-based elastomer is prepared by cross-linking polydimethylsiloxane (PDMS) with a F--encapsulating cage-type germoxane (Ge-O-Ge) compound. This material can self-heal repeatedly under humid conditions.
Article
Chemistry, Inorganic & Nuclear
Hiroki Noda, Masakazu Koike, Rika Sakai, Hiroaki Wada, Atsushi Shimojima, Kazuyuki Kuroda
Summary: Acid treatment of crystalline silicates is a simple method for preparing microporous silica materials, but its success depends on treatment conditions and the composition and crystallinity of the starting silicates. Acid-treated Eu-AV-9 showed both crystallinity and microporosity, capable of adsorbing CO2, with an increase in micropore volume and BET area with longer treatment time.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Multidisciplinary
Yuta Shimasaki, Takamichi Matsuno, Quansheng Guo, Atsushi Shimojima, Hiroaki Wada, Takao Mori, Kazuyuki Kuroda
Summary: Investigating the role of mesoporous structures in reducing thermal conductivity is crucial for the development of TiO2-based materials with excellent properties. By controlling the synthesis conditions, N-doped TiO2 samples with large crystallites and random mesoporous structures were prepared, and the thermal conductivity of the samples was successfully reduced by adjusting the nanoscale thickness of the pore walls. The presence of ordered mesopores further enhanced the reduction of thermal conductivity.
NANOSCALE ADVANCES
(2022)