Article
Chemistry, Physical
Kyle Matthews, Teng Zhang, Christopher E. Shuck, Armin VahidMohammadi, Yury Gogotsi
Summary: This paper reports on the mild synthesis and improved shelf life of Vanadium carbide MXene V2CTx, with ion exchange and flocculation processes allowing for its suspension in water for several months without degradation. The electronic and optical properties of the MXene have shown significant improvements, expanding its potential applications and allowing for fundamental studies of its properties.
CHEMISTRY OF MATERIALS
(2022)
Article
Engineering, Marine
Yifeng Ai, Lei Zhou, Kam Tim Tse, Hongfu Zhang
Summary: A direct numerical simulation (DNS) was performed on the flow past two tandem inclined flat plates at a Reynolds number of 150. The study explored the effects of interference and ground on fluid force, power spectral density analysis, flow structures, and instability. The results showed that larger ratios of gap spacing and plate height to plate length enhanced vortex shedding and magnified fluid forces. Small gap spacing was insufficient for gap flow development, and tandem plates were considered a single body for vortex shedding. The instability of tandem plates was influenced by the gap spacing ratio.
Article
Chemistry, Multidisciplinary
Junyao Li, Xingxing Li, Jinlong Yang
Summary: This study proposes a chemical method to reversibly control the spin order of two-dimensional organometallic lattices by utilizing lactim-lactam tautomerization. By designing several 2D organometallic frameworks, the transition from antiferromagnetic to ferrimagnetic spin order is achieved through tautomerization on organic linkers. This transition also alters the materials' electronic structures and enhances the magnetic anisotropy energy.
Article
Chemistry, Multidisciplinary
Matthew M. Wootten, Sofja Tshepelevitsh, Ivo Leito, Jonathan Clayden
Summary: This study presents a molecular system that undergoes rearrangements by the autonomous migration of a metal cation between different binding sites. The location of the metal is identified by the characteristic spectrum of a ligated chromophore. The migration rate can be controlled by varying temperature, water content, and triethylamine concentration.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Yongqiang Li, Quan Wang, Yuhua Ju, Yarong Li, Yanbo Zhang, Ronggui Hu
Summary: This study demonstrates the development of COF materials with dual functions for selective detection and effective removal of Ni2+ from aqueous solutions. The newly designed TAPA-PCBA material possesses high crystallinity, specific surface area, and chemical thermal stability to achieve this dual function through the dense distribution of functional chelating sites in its structure.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Physical
Edyta Tabor, Mariia Lemishka, Joanna E. Olszowka, Kinga Mlekodaj, Jiri Dedecek, Prokopis C. Andrikopoulos, Stepan Sklenak
Summary: This study demonstrates the potential of distant binuclear cationic Fe(II) centers in Fe-ferrierite for dioxygen activation, enabling the oxidation of methane to methanol at room temperature. Fe(II) sites stabilized in various zeolite matrices also exhibit similar activity, suggesting a possibility for developing Fe-zeolite-based systems for direct oxidations.
Article
Chemistry, Multidisciplinary
Luca Andreo, Giorgio Volpi, Federica Rossi, Paola Benzi, Eliano Diana
Summary: A highly symmetrical substituted macrocycle was designed, synthesized and characterized. It was found to have noticeable interactions with Pb2+ ions, making it a potential candidate for heavy metal ions removal or the design of artificial molecular machines.
Article
Chemistry, Inorganic & Nuclear
Yu-Qiao Su, Lianshe Fu, Guang-Hua Cui
Summary: Two luminescent Cd(ii)-organic frameworks with high thermal durability and water stability were synthesized and characterized. They can be used as multi-responsive probes for selectively detecting specific substances with reusability. The luminescence sensing mechanisms of these frameworks were also explored in detail.
DALTON TRANSACTIONS
(2021)
Article
Environmental Sciences
Lei Xu, Huiping Dai, Lidia Skuza, Shuhe Wei
Summary: The study revealed that there is severe heavy metal pollution in the soil at Daye and Zhuzhou sites, which requires attention and control to prevent further contamination.
Article
Nanoscience & Nanotechnology
Peng Liu, Xiaomei Wang, Xiaolong Jia, Jisheng Zhou
Summary: In this study, carbon-encapsulated mosaic Fe3O4 nanosheets were developed by the oriented attachment mechanism, providing continuous 2D nucleation regions and high metal utilization. The Fe3O4@CNS material exhibited stable solid electrolyte interphase (SEI) film formation and excellent cycle stability, demonstrating promising electrochemical performance for sodium metal anodes.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Meng-Ying Sun, Mo Xie, Chuang-Wei Zhou, Xue-Zhi Wang, Zhao-Xia Lian, Zi-Ye Chen, Yong-Liang Huang, Xiao-Ping Zhou, Dan Li
Summary: In this work, we report the self-assembly of four cubic Zn8L12Br4 molecular containers, which can bind hydrocarbon gases including methane, ethane, and ethene at ambient temperature. Two gas binding sites are discovered in these containers, one in the cavity and the other at the window, as confirmed by NMR spectra and DFT calculations. The performance of gas encapsulation can be tuned by adjusting substituent groups, making these metal-organic cages promising for studying and mimicking the functions of biological systems in binding and transforming hydrocarbon gases.
SCIENCE CHINA-CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Bo Wang, Jianming Li, Minghui Ye, Yufei Zhang, Yongchao Tang, Xuanhe Hu, Jun He, Cheng Chao Li
Summary: This work reports the development of a hexaazatrinaphthylene-based 2D pi-d conjugated metal-organic framework as an advanced anode material for sodium-ion batteries. This material exhibits dual-redox sites, leading to impressive reversible capacity and high-rate performance. Furthermore, when combined with a specific cathode material in a sodium-ion full battery, it also demonstrates stable long-cycle life.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Ran Wang, Liyun Wu, Ying Wei, Kaiping Zhu, Han Wang, Yagang Yao
Summary: This study prepared Zn anodes using a highly conductive three-dimensional carbon fibers skeleton with super-zincophilic ZnO preplaced on the surface, effectively inhibiting zinc dendrite growth and improving battery stability and cycling life.
MATERIALS TODAY ENERGY
(2022)
Article
Engineering, Environmental
Xihong Guo, Ying Li, Huan Huang, Dongmei Wang, Rongli Cui, Jialiang Li, Yidong Zhao, Dan Wang, Hui Yuan, Jinquan Dong, Baoyun Sun
Summary: Graphdiyne-based materials show great potential for adsorption and detection of heavy metal ions due to strong interactions between acetylenic links in graphdiyne and some metal ions. The introduction of N atoms in graphdiyne greatly improves the electrochemical performance, and the signal intensity is closely related to the number of detection sites. The TGDY-based electrochemical sensor demonstrates satisfactory selectivity, reproducibility, stability, and applicability for detecting Cd2+ and Pb2+ in water.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Thermodynamics
Olga A. Zakurdaeva, Irina O. Kuchkina, Tikhon S. Kurkin, Sergey V. Nesterov
Summary: The thermal stability of macrocyclic complexes with alkaline earth metal salts was studied in this research. The size of the cation and anion was found to affect the stability, with Ba2+ < Sr2+ < Ca2+ and Cl- < Br- ≈ I-. The complexes with CaCl2, SrBr2, and SrI2 exhibited a two-stage destruction mechanism, suggesting the coexistence of two conformationally nonequivalent forms of the macrocycles.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Chemistry, Multidisciplinary
Shohei Tashiro, Tsutomu Umeki, Ryou Kubota, Mitsuhiko Shionoya
Review
Chemistry, Multidisciplinary
Shohei Tashiro, Mitsuhiko Shionoya
ACCOUNTS OF CHEMICAL RESEARCH
(2020)
Article
Chemistry, Multidisciplinary
Hirotaka Yonezawa, Takafumi Shiraogawa, Mengying Han, Shohei Tashiro, Masahiro Ehara, Mitsuhiko Shionoya
Summary: Porous molecular crystals, such as the metal-macrocycle framework (MMF), have shown potential as heterogeneous metal catalysts for olefin migration reactions. Mechanistic studies revealed that the migration is catalyzed by in situ generated Pd-H species on the channel surface under photoirradiation, supported by DFT and ONIOM calculations.
CHEMISTRY-AN ASIAN JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Kenichiro Omoto, Shohei Tashiro, Mitsuhiko Shionoya
Summary: The study investigated the photochemical oxygenation reactions of a host-guest complex in solution and in the solid state, showing remarkable phase dependence in reactivity and functions. The result revealed that in solution, the anthracene moieties of the ligand were fully oxygenated to form a macrocycle, while in the solid state, a site-selectively oxygenated inclusion complex was formed with controlled oxygenated sites.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Shohei Tashiro, Kosuke Nakata, Ryunosuke Hayashi, Mitsuhiko Shionoya
Summary: This paper demonstrates the molecular recognition of amino acid and peptide derivatives by multipoint hydrogen bonding in a porous metal-macrocycle framework revealed by single-crystal X-ray diffraction analysis. l-Serine residues are site-selectively and residue-specifically adsorbed on the pore surface via multiple hydrogen bonds. A serine derivative is diastereoselectively recognized on the (P)- or (M)-side of the enantiomeric pore surface, and the conformation of the peptide is highly regulated, incorporating a poly-L-proline type I helix-like structure into the pore.
Article
Chemistry, Multidisciplinary
Yutaro Yamashita, Shohei Tashiro, Mitsuhiko Shionoya
Summary: Fine-tuning the ratio of two different states is crucial for controlling the structures and functions of crystalline materials. In this study, it was reported that clathrated guest molecules inside a tubular host crystal formed through halogen and hydrogen bonding exhibit reversible temperature-dependent orientational isomerization in equilibrium.
Article
Chemistry, Inorganic & Nuclear
Yutaro Yamashita, Shohei Tashiro, Yoshiki Ishii, Takayuki Uchihashi, Nobuyuki Matsushita, Ryou Kubota, Mitsuhiko Shionoya
Summary: The selective synthesis of gold nanoparticles with specific shapes and sizes remains challenging, but this study has shown a new one-step method for obtaining monodisperse branched AuNPs using a metal-macrocycle framework. The chemical structural features of the framework allow for the growth of branched AuNPs via pseudo-seeding, providing a new synthetic approach for diverse gold nanostructures.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Multidisciplinary
Mengying Han, Shohei Tashiro, Takafumi Shiraogawa, Masahiro Ehara, Mitsuhiko Shionoya
Summary: This study reports a catalyst, porous metal-macrocycle framework (MMF), that can chemically activate Pd centers precisely for specific catalytic long-range olefin migration reactions. The reaction specificity is related to the arrangement mode of the Pd active centers in the confined space.
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
(2022)
Article
Multidisciplinary Sciences
Ryunosuke Hayashi, Shohei Tashiro, Masahiro Asakura, Shinya Mitsui, Mitsuhiko Shionoya
Summary: The structure of porous molecular crystals can be controlled allosterically by the adsorption of effectors within low-symmetry nanochannels with multiple molecular recognition sites, leading to diverse framework structure conversion and switchable molecular affinity at different recognition sites. These findings may provide guidance for the development of supramolecular materials with flexible and highly-ordered three-dimensional structures for biological applications.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Wei He, Shohei Tashiro, Mitsuhiko Shionoya
Summary: Researchers have achieved highly controlled conversion of limonene by suppressing over-isomerization using a porous metal-macrocycle framework equipped with a Bronsted acid catalyst. The reaction selectivity observed in this confined space framework is in stark contrast to previous catalytic reactions.
Article
Chemistry, Organic
Shohei Tashiro, Wei He, Ryunosuke Hayashi, Yingjie Lin, Mitsuhiko Shionoya
Summary: Site-selective adsorption of four terpenoids, (S)-citronellal, nerol, geraniol and farnesol, in a porous metal-macrocycle framework (MMF) was revealed to be influenced by the binding structures to these MMF channels, explaining the promotion or inhibition of terpenoid cyclization. Specifically, the cyclization reaction of (S)-citronellal was significantly promoted by MMF, while other cyclization reactions were completely suppressed even with an acid catalyst fixed on the channel surface. Furthermore, in the reaction of the terpenoid mixture, (S)-citronellal exhibited substrate-specific cyclization.
ORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Physical
Shohei Tashiro, Tsutomu Umeki, Ryou Kubota, Mitsuhiko Shionoya
Summary: The researchers achieved the transformation of a chiral pore-surface into a homochiral pore-surface by blocking one side of the enantiomeric pore-surfaces with chiral auxiliaries, allowing for face-selective binding of a prochiral guest molecule.
FARADAY DISCUSSIONS
(2021)
Article
Chemistry, Inorganic & Nuclear
Shohei Tashiro, Shun Shimizu, Masumi Kuritani, Mitsuhiko Shionoya
DALTON TRANSACTIONS
(2020)
Article
Chemistry, Multidisciplinary
Kenichiro Omoto, Shohei Tashiro, Mitsuhiko Shionoya
Article
Chemistry, Multidisciplinary
Shohei Tashiro, Shinya Mitsui, David W. Burke, Ryou Kubota, Nobuyuki Matsushita, Mitsuhiko Shionoya
