Article
Materials Science, Ceramics
Sandra Dire, Emanuela Callone, Riccardo Ceccato, Francesco Parrino, Barbara Di Credico, Silvia Mostoni, Roberto Scotti, Massimiliano D'Arienzo
Summary: Ladder-like polysilsesquioxanes (LPSQs) with a double-stranded siloxane backbone can be used to prepare functional nanocomposites (NCs) by blending with organic polymers or exploiting the dispersion of inorganic fillers. The addition of TiO2 nanoparticles reduces the polymerization capacity of the organic side-chains and changes the organization of ladder chains in the polymerized LPMASQ. This research approach can be applied to other composite systems and provide insights for a better design of such materials.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Chemical
Su Cheol Shin, Jiyeong Kim, Jeevan Kumar Reddy Modigunta, G. Murali, Seongmin Park, Seongeun Lee, Hwiyoung Lee, Sung Young Park, Insik In
Summary: The ladder-like polysilsesquioxanes were utilized as a surface modifier for polyethylene separators in high performing lithium ion batteries, significantly improving capacity retention and cycle stability. The LIBs fabricated using this modified separator demonstrated excellent performance under 0.5C rate.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Chemistry, Applied
Zhiyu Huang, Peng Wu, Yankun Yin, Xiang Zhou, Lu Fu, Luoxin Wang, Shaohua Chen, Xu Tang
Summary: Novel modified cottons were obtained by introducing 4-aminopyridin into the surface of cotton fibers, and they exhibited high adsorption capacities and selective adsorption performance for the removal of anionic dyes from aqueous solution.
REACTIVE & FUNCTIONAL POLYMERS
(2022)
Article
Agricultural Engineering
Qihang Wang, Cuimei Luo, Zongyuan Lai, Shiqing Chen, Danwei He, Jun Mu
Summary: In this study, cork activated carbon (CAC) with excellent adsorption performance for various dyes was successfully obtained using a two-step pyrolysis method. The CAC exhibited a fluffy honeycomb structure consisting of porous carbon nanosheets and a well developed hierarchical porous structure, providing a large number of adsorption sites and transport channels for dye molecules. The CAC showed ultra-high adsorption capacity and fast equilibrium adsorption time, making it a promising adsorbent for efficient dye wastewater purification.
BIORESOURCE TECHNOLOGY
(2022)
Article
Polymer Science
Matthias Rohmer, Oezguen Ucak, Rahul Fredrick, Wolfgang H. Binder
Summary: This study investigated the synthesis of several short chain poly(Aib) by ring opening polymerization using different chiral amines as initiators and chiral induction agents, resulting in controlled structure, chirality, and formation of the polymers. The findings revealed excellent chiral induction by the initiators and the influence of solvent environment on the formation of poly(amino acids) aggregates, affecting their chiral induction.
Article
Chemistry, Multidisciplinary
Yuuya Kawasaki, Ryota Kamikubo, Yuta Kumegawa, Kouhei Ogawa, Takeru Kashiwagi, Yusuke Ano, Kazunobu Igawa, Katsuhiko Tomooka
Summary: Dynamic asymmetric induction (DYASIN) was used to convert racemic dynamic chiral heterohelicenes into highly enantioenriched forms (up to 96% ep) with quantitative yields. These heterohelicenes were easily transformed into semi-static axial-chiral 1,1'-binaphthyl derivatives in a stereospecific manner.
CHEMICAL COMMUNICATIONS
(2022)
Article
Green & Sustainable Science & Technology
Jingge Chen, Quanliang Cao, Xiaotao Han
Summary: The article introduces a smart water-based ferrofluid that can easily separate magnetic nanoparticles from the solution after adsorbing dyes, showing great potential in wastewater treatment. The ferrofluid exhibits superparamagnetism, high saturation magnetization, and strong colloidal stability, making it efficient in adsorbing dyes in a short time. The experimental data suggest that the ferrofluid follows pseudo-second-order kinetics and the Langmuir isotherm model for adsorption processes.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Electrical & Electronic
Jingjing Zhang, Lanjie Wang, Ming Liu, Jian Wang, Ke Sun, Yang Yang, Baofu Hu, Jian Xu, Taichao Su, Baoli Du
Summary: The study successfully synthesized stable cubic structure Cu3SbS3 and Fe-doped samples, optimized their thermoelectric properties by adjusting sintering parameters, demonstrating their potential as high-performance materials.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
Lina Zhang, Xiaomin Huo, Jin Zhu, Changbin Liu, Lianfeng Wang
Summary: Residual Chlorella-based cellulose nanofiber (CNF) and cationic cellulose nanofiber (CCNF) with surface quaternization were prepared as adsorbents, which showed high adsorption capacity for dyes, especially under acidic conditions. CCNF exhibited higher adsorption capacity compared to CNF.
Article
Environmental Sciences
Ozkan Acisli, Ilker Acar, Alireza Khataee
Summary: Geopolymers have been studied as eco-friendly and cost-effective adsorbents for cationic species removal in wastewater treatment. However, their application in removing anionic dyes is limited. In this study, a surface modification using CTAB was applied to a fly ash-based geopolymer to enhance the removal of Acid Blue 185 without requiring strongly acidic conditions.
Article
Chemistry, Physical
Daniel Gherca, Marieta Porcescu, Dumitru-Daniel Herea, Horia Chiriac, Nicoleta Lupu, Gabriela Buema
Summary: In this study, flower-like Mg(Al)(x)O-y clay nanostructures, obtained by calcining layered double hydroxide (LDH) material, were used as a low-cost adsorbent for the removal of cadmium ion and Congo red dye from wastewaters. Various characterization techniques were employed to study the material. The adsorption process was found to be spontaneous, and the material exhibited good recyclability. Additionally, the material showed high adsorption capacity for both cadmium ion and Congo red dye, indicating its potential for improving water quality.
APPLIED CLAY SCIENCE
(2023)
Article
Engineering, Environmental
Se-Hee Kim, Dong-Su Kim, Hiresh Moradi, Yoon-Young Chang, Jae-Kyu Yang
Summary: Dyes containing wastewater is produced in large quantities by various industries. Graphene and graphene-based materials are attractive adsorbents for dye removal due to their high surface areas and strong pi-pi interactions. A simple and economical method of producing graphene-like carbon using biomass pyrolysis has been investigated. Cellulose-derived graphene-like carbon (CGLC) was obtained through pyrolysis with FeCl3/ZnCl2, and its adsorption capacity for cationic and anionic dyes was studied. The CGLC showed high adsorption capacities for both Rhodamine B and Congo Red, indicating its potential as an efficient adsorbent for dye removal.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Agricultural Engineering
Fang Wang, Kexin Huang, Ziqi Xu, Fangyu Cao, Cheng Chen, Fengna Shi, Naipin Chen
Summary: In this study, a high-strength dynamic polysaccharide hydrogel with excellent mechanical and anti-fatigue properties was developed. It showed good removal efficiency for dyes in water. This research is of great significance for environmental applications, especially in water pollution adsorption treatment.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Engineering, Electrical & Electronic
Shengnan Lin, Tingan Zhang, Junjie Zhang, Xijuan Pan
Summary: In this study, nano-scale Mg(OH)(2), Ce(OH)(4), Mg/Ce(OH)(6), and MgCeO3 were synthesized by simple membrane electrolysis. The photocatalytic activity of the materials was investigated and it was found that pure Mg(OH)(2) exhibited better photocatalytic performance than expected. However, Mg(OH)(2)/Ce(OH)(4) and MgO/CeO2 showed poorer photocatalytic activity, requiring further research.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Polymer Science
Rana A. Alharbi, Fahad M. Alminderej, Nouf F. Al-Harby, Noura Y. Elmehbad, Nadia A. Mohamed
Summary: A new hydrogel based on chitosan crosslinked with 2-chlorophenyl-bis(6-amino-1,3-dimethyluracil-5-yl) methane has been developed and proven through various techniques. Its efficiency in removing anionic Congo red dye in industrial wastewater was studied, and the optimal conditions for removal were investigated. The hydrogel showed a high adsorption capacity for the dye and had potential as a reusable adsorbent for industrial wastewater remediation.
Article
Chemistry, Multidisciplinary
Hisako Sato, Kazuyoshi Takimoto, Jun Yoshida, Yutaka Watanabe, Akihiko Yamagishi
Summary: Solid-state vibrational circular dichroism (SD-VCD) spectra were measured on the ion-exchange adducts of sodium montmorillonite and [Cu(RR- or SS-oxa)](2+) as prepared in the presence of a substrate in Michael additions, (E)-2-butenoyl-2-oxazolidinone. By comparing the observed and theoretical VCD spectra, it was deduced that the substrate was transformed to a chiral structure in association with the Cu(II) complex within a clay mineral.
Article
Chemistry, Analytical
Hisako Sato, Masaru Shimizu, Keisuke Watanabe, Jun Yoshida, Izuru Kawamura, Jun Koshoubu
Summary: A multidimensional vibrational circular dichroism system with a positional coordinate was developed, utilizing a Quantum cascade laser as a high-intensity light source for precise focusing. The instrument was operated to analyze samples containing amide groups, including measurements in high background absorbance due to water medium. The system allowed for movement in both x and y directions, maintaining a mirror-image relation between optical antipodes.
ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Hisako Sato, Kazuyoshi Takimoto, Jun Yoshida, Akihiko Yamagishi
Summary: Through recording Vibrational Circular Dichroism (VCD) spectra, this study found that some of the VCD signals were enhanced in intercalation compounds of sodium montmorillonite co-adsorbing two kinds of metal complexes, compared to samples adsorbing each complex separately, indicating the delocalization of vibrational motions over a tightly bound molecular pair. The model of racemic adsorption of [M(II)(phen)(3)](2+) (M(II) = a divalent metal ion) in the interlayer space of a clay mineral was proposed.
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
(2021)
Article
Multidisciplinary Sciences
Wakako Mori, Keisuke Yuzu, Nadine Lobsiger, Hideo Nishioka, Hisako Sato, Terumasa Nagase, Keiichi Iwaya, Mikael Lindgren, Tamotsu Zako
Summary: Insulin balls formed at injection sites could be toxic or non-toxic, and minocycline may induce the degradation of insulin amyloids, leading to a shift from toxic to less-toxic species. The toxic species are structurally similar to sonicated fragments of insulin amyloids, suggesting a role of minocycline in modulating the cytotoxicity of insulin balls.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Multidisciplinary
Hisako Sato, Masaru Shimizu, Keisuke Watanabe, Jun Yoshida, Izuru Kawamura, Jun Koshoubu
Summary: A vibrational circular dichroism (VCD) system capable of microscopic scanning was developed, successfully validating its feasibility by reproducing authentic VCD peaks of a dipeptide.
Article
Chemistry, Medicinal
Hiroki Yamagishi, Hisako Sato, Izuru Kawamura
Summary: Microcrystals of l-Asn-d-Trp-l-Phe-NH2 (NdWFamide) derived from Aplysia kurodai were evaluated by vibrational circular dichroism (VCD) to analyze the chirality of the tryptophan residue and distinguish its stereoisomers. The VCD spectrum of NdWFamide showed significant differences from its diastereomer, NWFamide. The study demonstrated VCD as a useful method for structural analysis of naturally occurring d-amino acid-containing peptides.
Article
Chemistry, Multidisciplinary
Hisako Sato, Sumio Aisawa, Honoka Ida, Masaru Shimizu, Keisuke Watanabe, Jun Koshoubu, Jun Yoshida, Izuru Kawamura
Summary: In this study, a VCD system with a quantum-cascade laser was used to obtain a two-dimensional image of VCD signals on a pharmaceutical tablet. The results demonstrated the utility of the proposed system in quality control during drug manufacturing.
Article
Polymer Science
Misaki Nobayashi, Kazuhiro Shikinaka, Yoshiro Kaneko
Summary: A soluble double-chain (ladder-like) polysiloxane (DC-PS) with high thermal stability was successfully prepared by intramolecular polycondensation, showing high water repellency, adhesion to glass, and surface hardness in the cast film.
Article
Chemistry, Multidisciplinary
Akihiko Yamagishi, Shohei Yamamoto, Kazuyoshi Takimoto, Kenji Tamura, Masumi Kamon, Fumi Sato, Hisako Sato
Summary: This study attempted to chromatographically separate a series of derivatized amino acids using a column packed with an ion-exchange adduct. The results showed that most amino acids could be effectively separated, while some could only be partially separated, and others could not be separated at all. The mechanism of chiral discrimination was investigated using solid-state vibrational circular dichroism spectroscopy.
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
(2022)
Article
Materials Science, Ceramics
Yoshiro Kaneko
Summary: This paper reviews recent studies on the superacid-catalyzed preparation of POSS and their properties, polymerization, and hybridization. By controlling the reaction conditions, the proportion of POSS can be adjusted, and low-crystalline POSS and ionic liquids containing POSS components can be obtained. Antifogging films and polyacrylamide hydrogels prepared using POSS show excellent performance.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Hisako Sato, Kazuyoshi Takimoto, Akihiko Yamagishi, Jun Yoshida, Mitsuo Hara
Summary: Solid state vibrational circular dichroism (SD-VCD) spectra were recorded on intercalation compounds of sodium montmorillonite with a chiral iridium(III) complex. The VCD signals were sensitive to molecular interactions in adsorption layers and signal enhancement was achieved through coherent delocalization of vibrational motions. Theoretical simulations were used to propose models of molecular packing.
APPLIED CLAY SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Yoshiro Kaneko
Summary: This paper presents the recent research of the author on the synthesis and characterization of thermally stable ionic liquids (ILs) with siloxane frameworks. Quaternary ammonium and imidazolium salt-type ILs with random oligosilsesquioxane frameworks were successfully prepared using a superacid catalyst and solvent. Moreover, imidazolium salt-type ILs with polyhedral oligomeric silsesquioxane (POSS) frameworks and amorphous POSSs with randomly distributed ionic groups were also synthesized. These ILs exhibited higher thermal decomposition temperatures compared to general ILs.
Article
Materials Science, Multidisciplinary
Takashi Hamada, Tetsuya Maeda, Kazuaki Kawashima, Tetsuya Sugimoto, Arata Tanaka, Yuko Tanaka, Daiji Katsura, Susumu Mineoi, Yoshiro Kaneko, Joji Ohshita
Summary: A poly[3-(2-aminoethylamino)propyl]silsesquioxane (PAEAPS) film was immersed in a hydrogen chloride (HCl) methanolic solution to prepare a poly[3-(2aminoethylamino)propyl]silsesquioxane hydrochloride (PAEAPSCl) film for the development of high-performance antifogging materials. The PAEAPS-Cl film exhibited higher water uptake and scratch resistance than the PAEAPS film. The introduction of the amine hydrochloride salt structure increased the antifogging properties and surface hardness.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Jun Yoshida, Kana Yamazaki, Kazunori Tateyama, Hidetaka Yuge, Hisako Sato
Summary: Four types of tris-chelate ruthenium complexes with acetylacetonato and tropolonato ligands were synthesized and optically resolved into Delta and Lambda isomers. The absolute configurations of the enantiomeric complexes Ru-2 and Ru-3 were determined, with Ru-2's configuration confirmed by single crystal X-ray diffraction analysis. ECD changes upon chemical oxidation were investigated for all four complexes, showing different behaviors in oxidation, ECD changes, and racemization.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Inorganic & Nuclear
Kazuyoshi Takimoto, Yutaka Watanabe, Jun Yoshida, Hisako Sato
Summary: The freshly prepared iridium complex 1 has a five-coordinate geometry, showing stable enantiomers Delta and Lambda in chloroform.
DALTON TRANSACTIONS
(2021)
