Article
Food Science & Technology
Mengdan Zheng, Qianyun Ma, Liling Li, Yangyang Wang, Ran Suo, Wenxiu Wang, Jianfeng Sun, Jie Wang, Hongying Liu
Summary: A novel and convenient nano cerium oxide peroxidase mimic smart film was developed for rapid detection of hypoxanthine (HX) concentrations to predict shrimp freshness. Xanthine oxidase was incorporated into the film to react with HX and produce H2O2. Cerium oxide nanoparticles (CeNPs) were used as redox amplifiers and chromogenic agents, and their feasibility as multifunctional nanozymes for HX detection was explored.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Applied
Andrzej Sienkiewicz, Agnieszka Kierys
Summary: The highly porous cerium oxide in the form of microspheres and micrometric particles was produced by low temperature calcination of cerium nitrate-saturated Amberlite XAD7HP microspheres. The synthesis process relied on the swelling ability and thermal stability of the polymer template. The final cerium oxide was characterized using various techniques and the temperature effect on the polymer microspheres was evaluated in synthetic air.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Instruments & Instrumentation
Leilei Bao, Jongho Park, Gwenael Bonfante, Beomjoon Kim
Summary: Porous microneedles, a novel drug delivery system, have unique features and mechanisms for efficient drug or biofluid transport. By adjusting the porosity and material selection, microneedles can achieve mechanical strength and integrate biosensors for portable detection and rapid measurement of biomarkers.
DRUG DELIVERY AND TRANSLATIONAL RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Chang-Ju Lee, Nirmal Kumar Shee, Hee-Joon Kim
Summary: A robust porous organic polymer, SnPOP, was synthesized by cross-linking Sn(iv) porphyrin with fluorinated polyimide (FPI) via sol-gel formation and supercritical CO2 drying. SnPOP exhibited desirable physical properties of porphyrin and mesoporous structures with a relatively high surface area. Due to its assembly via covalent bonds, SnPOP showed thermal stability up to 600°C and high resistance to boiling water, strong acids, and bases. It also demonstrated efficient CO2 uptake and pollutant dye removal capabilities, as well as photocatalytic activity for silver nanoparticle synthesis.
Article
Chemistry, Multidisciplinary
Yuyan Lai, Junsheng Yang, Linkun Cai, Mingxin Zhang, Xiaofeng He, Haitao Yu, Mu Li, Guo-Hong Ning, Panchao Yin
Summary: Neat molecular porous liquids were constructed by grafting polymers onto the surface of 2 nm molecular nanocages with precisely tuned graft densities and molecular weights. The flowability of the porous liquids showed a non-monotonic dependence on the molecular weights of the polymers, allowing for optimization of their viscosities and gas absorption properties.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jun Zhang, Wataru Kosaka, Qingxin Liu, Naoka Amamizu, Yasutaka Kitagawa, Hitoshi Miyasaka
Summary: This study investigates the preparation of CO2-induced antiferromagnets and their reversible electronic state change and magnetic phase transition through charge transfer, leading to improved conductivity.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Review
Chemistry, Multidisciplinary
Kathrin L. Kollmannsberger, Laura Kronthaler, Joerg R. Jinschek, Roland A. Fischer
Summary: This review highlights recent advances in the controlled synthesis of MA@MOF materials for atom-precise metal aggregates. It focuses on the main synthetic strategies and approaches to achieve novel hierarchical MA@MOF structures, as well as providing an overview of standard characterization methods and techniques for localizing MA within MOF cavities.
CHEMICAL SOCIETY REVIEWS
(2022)
Article
Engineering, Environmental
Seongsoo Lee, Dong Woo Kang, Jin Hwan Kwak, Sunghee Shin, Jun-Woo Park, Seung-Ho Yu, Hun-Gi Jung, Byung Gon Kim, Hee-Dae Lim
Summary: Rechargeable magnesium-metal batteries have attracted attention as alternatives to current Li-ion batteries. In this study, a unique anode host Au@PCNF was developed, which exhibited improved cycle performance and adhesion for magnesium metal.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Polymer Science
So-Lee Baek, Yeojin Kim, Yoojin Jang, Sang-Min Lee
Summary: In this study, we demonstrate that the incorporation of tannic acid (TA) in chitosan-based nanogels enhances the self-association of polymer networks and improves the stability of colloidal gels in protein solutions. TA achieves this through multivalent hydrogen bonding and pi-stacking capability, as confirmed by viscosity estimation and fluorescence emission analysis. Furthermore, TA can easily coordinate with various metallic cations, allowing for acid-sensitive drug release and delivery of metallic components.
Article
Polymer Science
So -Lee Baek, Yeojin Kim, Yoojin Jang, Sang -Min Lee
Summary: In this study, the addition of a natural polyphenol additive, tannic acid (TA), was found to enhance the self-association of chitosan-based nanogel templates and improve the stability of colloidal gels in protein solution. TA also exhibited the ability to immobilize a cisplatin pharmacophore for acid-sensitive drug release and delivery of metallic components.
Article
Nanoscience & Nanotechnology
Alvin M. H. Lim, Hua Chun Zeng
Summary: This work focuses on exploring the production of ultrathin hollow ceria or other rare-earth metal oxides, presenting a novel synthetic protocol for making ultrathin mesoporous hollow spheres with a tunable shell thickness. The approach shows promise for better utilization of rare-earth metal elements in various technological applications, including the fabrication of singular or multicomponent rare-earth metal oxides with ultrathin hollow morphology and structural uniformity.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
B. Priyadarshini, Arul Xavier Stango, M. Balasubramanian, U. Vijayalakshmi
Summary: Cerium-doped hydroxyapatite films enhanced with magnetite were developed to inhibit bacterial adhesion, biofilm formation, and exhibit anticancer properties. These coatings have the potential to enhance bone implants by creating cerium-doped hydroxyapatite/Fe3O4 coatings on a titanium support. Various analyses were used to evaluate the coatings, which showed good efficacy against Staphylococcus aureus and Escherichia coli. Moreover, the coatings demonstrated in vitro bioactivity for bone-like apatite formation and had the capability for osteoblastic cell adhesion and proliferation. The coatings also exhibited optimal heating capacity for bone-cancer therapy.
NANOSCALE ADVANCES
(2023)
Article
Chemistry, Multidisciplinary
B. Priyadarshini, Arul Xavier Stango, M. Balasubramanian, U. Vijayalakshmi
Summary: Cerium-doped hydroxyapatite films enhanced with magnetite were developed via spin-coating to inhibit bacterial adhesion and biofilm formation. Coatings on a titanium support showed good efficacy against Staphylococcus aureus and Escherichia coli, and exhibited bioactivity for bone-like apatite formation. The Ce-HAP/Fe3O4 films also promoted the adhesion and proliferation of osteoblastic cells, making them promising for bone healing and bone-cancer therapy.
NANOSCALE ADVANCES
(2023)
Article
Engineering, Environmental
Joanna Lupa, Kinga Morlo, Ryszard Dobrowolski, Piotr Legutko, Andrzej Sienkiewicz, Agnieszka Kierys
Summary: This study presents an easy and inexpensive method for synthesizing highly porous cerium oxide beads and demonstrates their excellent performance in arsenic adsorption. The comprehensive investigation of synthesis conditions and cerium oxide properties reveals the crucial importance of the nano-level surface composition in arsenic adsorption.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Polymer Science
Alexander S. Pozdnyakov, Artem I. Emel'yanov, Svetlana A. Korzhova, Nadezhda P. Kuznetsova, Yuliya I. Bolgova, Olga M. Trofimova, Tatyana A. Semenova, Galina F. Prozorova
Summary: New stable nanocomposites with copper nanoparticles in a polymer matrix have been successfully synthesized using green chemistry. The obtained polymer nanocomposites consist of isolated copper nanoparticles with a certain copper content.
Review
Chemistry, Multidisciplinary
Nobuhiko Hosono, Takashi Uemura
Summary: Molecular recognition is crucial for modern chemical processes, particularly in separating polymers. Conventional methods struggle with recognizing small structural differences in polymers. Metal-organic frameworks show promise in precisely identifying and separating polymer structures, offering potential for advancements in polymer synthesis.
ACCOUNTS OF CHEMICAL RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Shao-Wei Lo, Takashi Kitao, Yusuke Nada, Kei Murata, Kazuyuki Ishii, Takashi Uemura
Summary: The study demonstrates that a chiral metal-organic framework can guide the formation of highly chiral nanocomposites with intense chiral signals from buckminsterfullerene through in situ self-assembly strategy. Experimental and theoretical studies reveal that the chiral induction is attributed to the hybridization of molecular orbitals with the pore surface of the MOF.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Nanoscience & Nanotechnology
Vikram V. Karve, Till Schertenleib, Jordi Espin, Olga Trukhina, Xiyuan Zhang, Marta Ximenis Campins, Takashi Kitao, Claudia E. Avalos, Takashi Uemura, Wendy L. Queen
Summary: This study introduces a simple method for producing MOF/polymer composites and demonstrates their ability to selectively extract Ag+ ions from laundry wastewater for catalytic reactions. The research shows the impact of MOFs on polymer functionalities and highlights the potential for sustainable catalysts in the future.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Kaoru Kioka, Nagi Mizutani, Nobuhiko Hosono, Takashi Uemura
Summary: This paper proposes a design approach using mixed metal-organic frameworks (MOFs) as tunable stationary phases in liquid chromatography (LC). By systematically designing ligands, the pore sizes in the MOFs can be tuned. Columns packed with the MOFs and their mixed-particle/solid-solution stationary phases are prepared and tested for the retention capability of polyethylene glycol (PEG) in LC. The results demonstrate that mixed-linker solid-solution MOFs have higher retention capability compared to pure MOF stationary phases, due to their specific nanostructures.
Article
Chemistry, Physical
Takumi Miura, Takashi Kitao, Takashi Uemura
Summary: Encapsulation of pentacene in metal-organic frameworks greatly enhances its luminescence, allowing precise tuning of the emission band in the near-infrared region. The confined PNT exhibits exceptional stability and response to additional guest molecules, making it suitable for applications in vapor sensing. This study highlights the importance of rational design in maximizing the properties of fluorophores for advanced nanomaterials.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Nagi Mizutani, Nobuhiko Hosono, Takashi Uemura
Summary: We present a novel approach to encapsulate large guest molecules in nanoporous materials, metal-organic frameworks (MOFs), via an in situ crystal formation method. This method has exciting prospects in the design of new organic/inorganic hybrids, as well as capturing and separating molecules that are significantly larger than the actual pore size of the host MOF.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Masahiro Abe, Yuki Kametani, Takashi Uemura
Summary: In this study, a new method for synthesizing double-stranded polymers was developed. By conducting crosslinking radical polymerization inside a metal-organic framework, soluble double-stranded polymers were successfully obtained. This technique has potential applications in various fields.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Takashi Kitao, Alexandre Legrand, Taizo Mori, Katsuhiko Ariga, Takashi Uemura
Summary: The orientation of polymer chains is crucial for the properties of polymeric materials. In this study, anisotropic polythiophene particles with controlled lengths were fabricated using a metal-organic framework template, resulting in the preferential alignment of unprocessable polythiophene chains.
MOLECULAR SYSTEMS DESIGN & ENGINEERING
(2023)
Article
Polymer Science
Ami Nishijima, Yuki Hayashi, Koichi Mayumi, Nobuhiko Hosono, Takashi Uemura
Summary: This report presents a bottom-up synthesis method for a polymer-based 2D electrolyte using a metal-organic framework (MOF) as a template. Crosslinking polymerization of methyl methacrylate (MMA) within MOF nanochannels resulted in poly(methyl methacrylate) (PMMA) monosheets. Hydrolysis of the precursor polymer gave poly(methacrylic acid) (PMAA) sheets. PMAA-1 exhibited high solubility and viscous liquid-like nature when dispersed in water at a pH higher than 5.7, and the addition of Al3+ ions promoted hydrogel formation.
Article
Multidisciplinary Sciences
Tomoya Iizuka, Hiroyuki Sano, Benjamin Le Ouay, Nobuhiko Hosono, Takashi Uemura
Summary: Mechanically interlocked architecture has led to the development of various molecular systems, but the focus has been primarily on the molecular-scale integrity and topology of the structures. The topological material design of such architectures at different scales has not been fully explored.
NATURE COMMUNICATIONS
(2023)
Article
Polymer Science
Xiyuan Zhang, Takashi Kitao, Ami Nishijima, Takashi Uemura
Summary: Polyacrylonitrile (PAN) nanosheets with unimolecular thickness were successfully synthesized by cross-linking polymerization in the 2D nanospaces of a metal-organic framework. The ultrathin 2D network structure inhibited crystallization and allowed for efficient thermal transformation reaction of PAN. The amorphous nature of the PAN nanosheets facilitated thermal dehydroaromatization reactions to yield a ladder polymer structure with a highly extended conjugated system. Notably, further carbonization of this ladder polymer produced graphitic carbon with a highly ordered structure due to the well-defined precursor structure.
Article
Polymer Science
Ami Nishijima, Takashi Uemura
Summary: This paper presents different synthetic approaches to two-dimensional polymeric materials (2DPMs) and classifies them into three categories. Each approach can generate 2DPMs with unique features. Lastly, it discusses current challenges in synthetic design and future development directions.
Review
Polymer Science
Takashi Kitao, Xiyuan Zhang, Takashi Uemura
Summary: This review describes recent developments and future perspectives in the confined synthesis of conjugated ladder polymers (CLPs) utilizing templates such as metal surfaces and nanoporous materials. Accessing CLPs with greater diversity through template confinement allows for control over their intrinsic properties, paving the way for future applications in various fields.
Article
Chemistry, Inorganic & Nuclear
Tomoya Iizuka, Nobuhiko Hosono, Takashi Uemura
Summary: In this study, the mechanical properties of metal-organic frameworks (MOFs) are improved by filling the MOF pores with polymer chains, resulting in enhanced resilience and toughness against mechanical pressures.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Multidisciplinary
Noriyoshi Oe, Nobuhiko Hosono, Takashi Uemura
Summary: The study reveals that polyethylene glycols can be adsorbed into sub-nanometer pores of metal-organic frameworks, providing insights into polymer analysis and separation. The unique solvent dependence and molecular weight effects on adsorption kinetics and selectivity are discussed, highlighting the potential of this method for polymer analysis and separation.
