Article
Chemistry, Multidisciplinary
Kohei Sambe, Norihisa Hoshino, Takashi Takeda, Takayoshi Nakamura, Tomoyuki Akutagawa
Summary: This study introduces highly designable supramolecular cations into conducting anion radical salts, demonstrating the impact of alkali metal ions and crown ethers combinations on molecular structure and properties. The variations in supramolecular cations and TCNQ arrangements were observed, highlighting the importance of different M+ ions and crown ethers in forming specific structures.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Materials Science, Textiles
Vesna Zepic, Primoz Oven, Matjaz Cop, Viljem Vek, Biljana Jankovic, Ida Poljansek
Summary: Due to their unique structure and properties, cellulose nanofibril hydrogels show great potential in biomedical applications. This study successfully prepared cellulose nanofibril-based hydrogels with outstanding characteristics, including ultralow density, super water absorbency, and exceptional shear and compressive resilience. The alkali neutralization treatment played a crucial role in achieving these properties.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Agricultural Engineering
Wenli Wang, Yichen Liu, Yue Wang, Longfei Liu, Changwei Hu
Summary: The pretreatment with nickel salts significantly improved the thermal behaviors and characteristics of alkali lignin during slow pyrolysis, resulting in biochars with increased specific surface area and pore size. The biochars catalyzed selective hydrogenation of nitrobenzene and demonstrated high adsorption capacity for lead, with different nickel salts contributing to specific product formations.
BIORESOURCE TECHNOLOGY
(2021)
Article
Spectroscopy
Boleslaw Barszcz, Tetiana N. Starodub, Adam Mizera, Roman Swietlik, Karol Rytel, Viktor O. Iaroshenko, Vladimir A. Starodub
Summary: The (N-Xy-Qn)(TCNQ)(2) anion-radical salt with tetramerized stacks of TCNQ acceptor molecules was successfully synthesized and characterized using vibrational spectroscopy and electrical resistivity measurements. Analysis of the crystal structure data revealed non-uniform charge distribution, with -0.83 e localized on the inner B molecules and -0.33 e on the outer A molecules. The infrared and Raman spectra were dominated by TCNQ vibrational modes and exhibited splitting related to the tetramerized structure. The material exhibited low-conducting behavior with a room temperature conductivity of 2.6 mS cm(-1), and the temperature dependence of resistivity could be explained by the band conduction model. The estimated charge distribution based on crystal data was confirmed by other charge-sensitive modes.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Multidisciplinary Sciences
Yiping Zou, Tingting Liu, Qijun Du, Yingying Li, Haibo Yi, Xing Zhou, Zhuxin Li, Lujie Gao, Lan Zhang, Xiao Liang
Summary: In this study, a four-electron aqueous zinc-iodine battery was developed by enhancing the iodine electrochemistry using a specially designed electrolyte. Experimental characterization and modeling showed that limited water activity and sufficient free chloride ions in the electrolyte are crucial for the four-electron process. The advantages of the electrolyte also help stabilize the zinc anode, leading to a high energy density and reliable cycling performance for the Zn-I-2 aqueous battery.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Inorganic & Nuclear
Romain Moury, Zbigniew Lodziana, Arndt Remhof, Leo Duchene, Elsa Roedern, Angelina Gigante, Hans Hagemann
Summary: This work investigates the structural and mechanical properties of alkali hydrido-closo-(car)borates, a promising class of solid-state electrolyte materials, using high-pressure and temperature-dependent X-ray diffraction experiments combined with density functional theory (DFT) calculations. The study reveals low shear moduli and high coefficients of thermal expansion for these compounds, as well as pressure-induced and temperature-induced phase transitions. The findings suggest potential benefits for manufacturing and stable cycling of all-solid-state batteries.
INORGANIC CHEMISTRY
(2022)
Article
Electrochemistry
V. A. Volkovich, A. A. Ryzhov, A. B. Ivanov, A. V. Shchetinskiy, D. S. Maltsev
Summary: The reaction between oxygen and neodymium chloride in high-temperature molten salt was studied in this research, focusing on determining the kinetic parameters such as reaction rates, rate constants, and activation energy. Factors such as the amount of oxygen, temperature, and gas phase composition were considered for their impact on the reaction process.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Inorganic & Nuclear
Renu K. Rohal, Jitendra Nath Acharyya, Mohd Shanu, G. Vijaya Prakash, Muniappan Sankar
Summary: A series of beta-TCBD-appended porphyrins were synthesized and characterized for their nonlinear optical response and excited state absorption dynamics, showing potential applications in laser protection and high-power laser operation. The obtained results indicated enhanced nonlinear optical properties and faster relaxation dynamics, making the synthesized porphyrins promising materials for future optical applications.
INORGANIC CHEMISTRY
(2022)
Article
Construction & Building Technology
Alaa M. Morsy, Abd-Elmoaty M. Abd-Elmoaty, Ahmed Hassan Ali, Ali H. Shalan
Summary: This study focuses on using alkali-activated concrete (AAC) in nonstructural applications, such as producing bricks, taking advantage of its defects. Waste from the iron industry and slag were used as substitutes for cement and aggregates, resulting in AAC bricks with high compressive strength, reduced water absorption, and higher drying shrinkage.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Energy & Fuels
Zeeshan Khan, Ghulam Murtaza, Abdul Ahad Khan, Amel Laref, Nessrin A. Kattan, Muhammad Haneef
Summary: This study investigates the physical and optical properties of bi-alkali pnictogens compounds, revealing their semiconductor nature and significant optical responses in the visible to ultraviolet energy region, making them potential candidates for electro-optical and optoelectronic devices.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Applied
Mai Shiozaki, Takuya Miyanishi, Hitoshi Tamiaki
Summary: The 3-vinyl group of methyl pyropheophorbide-a was chemically transformed into partially or fully deuterated groups through various reactions. Regioselectively deuterated pyropheophorbides were obtained with minimal loss of deuteration degree compared to the starting materials. Deuteration largely affected the infrared vibrational bands, slightly impacted specific proton signals, and did not change visible absorption bands in a solution.
Article
Materials Science, Multidisciplinary
T. Nomura, A. Ikeda, M. Gen, A. Matsuo, K. Kindo, Y. Kohama, Y. H. Matsuda, S. Zherlitsyn, J. Wosnitza, H. Tsuda, T. C. Kobayashi
Summary: The study found that the sound velocity of liquid oxygen decreases monotonically and sound attenuation increases asymptotically when magnetic fields are applied. The strong attenuation, twenty times larger than the zero-field value, suggests strong fluctuations in the local molecular arrangement, possibly relating to a liquid-liquid transition or crossover.
Article
Chemistry, Physical
B. Sohail, P. J. Blowey, L. A. Rochford, P. T. P. Ryan, D. A. Duncan, T. -l. Lee, P. Starrs, G. Costantini, D. P. Woodruff, R. J. Maurer
Summary: This study investigates the influence of coadsorbed electron-donating alkali atoms and TCNQ on the Ag(100) surface through a combination of experimental and theoretical methods. Various coadsorption phases are characterized, and the quantitative structures are compared with density functional theory calculations. The adsorption structures depend on the interplay of molecule-metal charge transfer and dispersion forces, which are controlled by the composition ratio between alkali atoms and TCNQ. The work function is predicted to have a strong dependence on the alkali donor-TCNQ acceptor coadsorption ratio.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Environmental Sciences
Jiaping Liang, Yi Li, Bingcheng Si, Yanzi Wang, Xinguo Chen, Xiaofang Wang, Haoran Chen, Haoran Wang, Fucang Zhang, Yungang Bai, Asim Biswas
Summary: Biochar application is a promising method to improve soil quality, but the optimal amount for enhancing physical and hydraulic properties remains uncertain. This study found that biochar treatments significantly reduced bulk density and increased soil porosity, with 21.9 t ha(-1) being recommended as the most optimal amount for saline-alkali soil.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Polymer Science
Ildiko Merta, Bojan Poletanovic, Jelena Dragas, Vedran Carevic, Ivan Ignjatovic, Miroslav Komljenovic
Summary: The physical and mechanical properties of hemp-fibre-reinforced alkali-activated mortars were studied under accelerated carbonation. The addition of hemp fibers improved the water absorption, compressive strength, and flexural strength of the mortars. However, it also led to embrittlement of the fiber/matrix interface and the composite as a whole. A FA/GBFS-based mortar with a fiber dosage of 0.5 vol% showed the best performance in terms of fiber/matrix interface and stress transfer, mitigating embrittlement under accelerated carbonation.
Article
Chemistry, Multidisciplinary
Ibuki Nakamura, Ryo Sumitani, Tomoyuki Mochida
Summary: Nitro-nitrito isomerization, a well-known photoreaction in metal complexes, was studied in different packing environments using a cationic platinum(II) nitrito complex. The polymorphs of the salt exhibited various conversion rates at different temperatures, with the beta-form showing a space group change upon photoirradiation. A salt with the (CF3SO2)(2)N- anion displayed both crystalline and glassy states at low temperatures, with the crystalline state showing around 30% conversion at 100 K. Less densely packed crystals in these salts deteriorated upon photoirradiation.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Chemistry, Inorganic & Nuclear
Atsuhiro Miyawaki, Kazuo Eda, Tomoyuki Mochida, Takahiro Sakurai, Hitoshi Ohta, Takahito Nakajima, Kazuyuki Takahashi
Summary: The temperature-dependent study of magnetic susceptibility revealed a change in the spin-crossover transition behavior from abrupt to gradual conversions, with a recovery of the initial abrupt transition at room temperature. Variable-temperature crystal structures showed an SCO-triggered isomerization and relaxation of the azobenzene ligand, indicating a pedal-like motion of the ligand in the high-spin state but not in the low-spin state.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Tomoyuki Mochida, Syou Maekawa, Ryo Sumitani
Summary: A study was conducted to explore ionic liquids with stimuli-responsiveness based on linkage isomerization, resulting in the synthesis of an ionic liquid containing a cationic half-sandwich thiocyanate complex. The N- and S-coordinated isomers showed small solvatochromic absorption shifts in organic solvents, with different solvent dependencies observed for each isomer.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Thi Hien Thuy Nguyen, Chaolu Eerdun, Takuya Okayama, Satoshi Hisanaga, Takumi Tominaga, Tomoyuki Mochida, Jun-ichiro Setsune
Summary: This study discusses bimetallic complexes of hexapyrrole-alpha, omega-dicarbaldimines and their structure-property relationships. The complexes can adopt different structural forms depending on the conformation of the 2,2'-bipyrrole subunit, and reversible oxidation and spectroscopic changes were observed in experimental conditions.
JOURNAL OF PORPHYRINS AND PHTHALOCYANINES
(2022)
Article
Chemistry, Inorganic & Nuclear
Shota Hamada, Tomoyuki Mochida
Summary: Ionic liquids containing cationic mixed-valence biferrocenylene derivatives were synthesized, and their melting points and temperature dependence were found to be related to the substituents on the cations.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Ryo Horikoshi, Ryo Sumitani, Natsuko Shimooka, Tomoyuki Mochida
Summary: This study focuses on the crystal structures, absorption wavelengths, and redox potentials of trinuclear complexes formed by ferrocene-based multidentate ligands and various transition-metal salts.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Tomoyuki Mochida, Yi Qiu, Ryo Sumitani, Hironori Kimata, Yoshitomo Furushima
Summary: Several meltable coordination polymers (CPs) with high flexibility and processability have been developed recently. However, the melting mechanism and vitrification conditions of these materials are not fully understood. In this study, meltable CPs incorporating ionic liquid components were synthesized and their crystal structures, melting behaviors, and vitrification upon rapid cooling were investigated.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Ryo Sumitani, Daisuke Kuwahara, Tomoyuki Mochida
Summary: Cationic rhodium complexes with 1,5-cyclooctadiene (cod) ligands were synthesized and their solid-state structures, thermal properties, and reactivities were investigated. The phase transitions of these salts resulted in disordered solid-state structures, with an increase in structural disorder as the cation symmetry decreased. FSA salts showed lower crystal symmetry and less cation disorder compared to SbF6 salts. Additionally, thermal stabilities and reactivities of these salts were studied, revealing different reactions upon melting for FSA and SbF6 salts.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Tomoyuki Mochida
Summary: Ionic liquids (ILs) with cationic metal complexes have unique physical properties and chemical reactivities. This review focuses on the molecular design, physical properties, and reactivities of organometallic ILs containing sandwich or half-sandwich complexes. It mainly covers stimuli-responsive ILs that can change their magnetic properties, solvent polarities, colors, or structures by external fields or reaction with coordinating molecules.
Article
Chemistry, Physical
Tomoyuki Mochida, Masato Shimada, Ryo Sumitani
Summary: Controlling the ionic conductivity of liquids is essential for electronic device applications, and we have developed metal-containing ionic liquids that exhibit reversible changes in ionic conductivity through UV photoirradiation and heating. The substituents in these liquids significantly affect the photochemical reaction, and by combining liquids with different reactivity, the conversions can be controlled. The ionic conductivity of these liquids undergoes reversible changes through successive photoirradiation-heating cycles, reflecting their photoreactivity.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Multidisciplinary
Tomoyuki Mochida, Syou Maekawa, Ryo Sumitani
Summary: Cp Ru complexes can be synthesized into Ru-containing ionic liquids (ILs) that exhibit diverse physical and chemical properties depending on the auxiliary ligand. These ILs can undergo in situ ligand exchange, allowing for interconversions between different ligands.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Kazuyuki Takahashi, Takumi Noguchi, Keiji Ueda, Atsuhiro Miyawaki, Suguru Murata
Summary: A series of Al(III) complexes of azp derivatives were synthesized and their oxidation behavior was investigated. The results showed that the azp ligands are easily oxidized and can form relatively stable oxidation species depending on substituent effects.
Article
Chemistry, Multidisciplinary
Tomoyuki Mochida, Yi Qiu, Yusuke Funasako, Makoto Inokuchi, Mariko Noguchi, Hiroki Fujimori, Yoshitomo Furushima
Summary: A 2D coordination polymer containing an ionic liquid was synthesized via a solvent-free reaction. The material exhibited unique melting properties and underwent solid-liquid phase transitions at different temperatures. Rapid cooling resulted in complete vitrification.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Ryo Sumitani, Masamichi Yamanaka, Tomoyuki Mochida
Summary: In this study, we developed organometallic compounds that release low-molecular-weight gelators upon photoirradiation, and successfully achieved photogelation of ionic liquids. The gelled ionic liquids underwent reversible reaction upon heating, and the photogelation was repeatable for ILs with coordinating cations.
