Article
Chemistry, Inorganic & Nuclear
Jhon Zapata-Rivera, Carmen J. Calzado
Summary: This study investigates the relationship between the magnetic properties of salts based on [Ni(dmit)(2)](-) radicals and the different arrangements of these radicals in crystals. By analyzing models with neighboring [Ni(dmit)(2)](-) units with different interaction patterns, the study identifies the nature and expected amplitude of through-space interactions based on a valence-only model. Despite its simplicity, the model provides simple rules for predicting the interactions in systems containing [Ni(dmit)(2)](-) radicals.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Multidisciplinary
Jin Wang, Na Jiang, Lele Wang, Di Wang, Xiaoshen Chen, Danxi Huang, Lei Wang
Summary: By incorporating 4-aminobenzo-15-crown-5-ether molecules as specific ion binding sites, we have developed two-dimensional Ti3C2Tx ion nanochannels, which have significant influence on ion transport and improved ion recognition.
Article
Nanoscience & Nanotechnology
Qing Lan, Yutao Liu, Jian Qin, Yali Zhao, Zhiping Song, Hui Zhan
Summary: This study successfully reduced dendrite growth on the lithium anode using a lithium chelating agent B15C5, providing a new approach to address issues in lithium batteries.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Chemical
Lan Li, Mingna Feng, Mingxia Wang, Zhihao Jiao, Jixue Li, Linfang Dong, Feng Yan
Summary: In this study, a crown ether functionalized polysulfone membrane with selective separation performance for Li+ was successfully prepared, showing promising application prospects for the separation of Li+ from brine. The dense membrane can achieve a separation factor of 32.6 for Mg2+ to Li+, indicating high selectivity for Li+ separation.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2021)
Article
Chemistry, Multidisciplinary
Kazuya Kubo, Kiyonori Takahashi, Shota Nakagawa, Ken-ichi Sakai, Shin-ichiro Noro, Tomoyuki Akutagawa, Takayoshi Nakamura
Summary: The study synthesized four crystals and discussed the effects of different substituents on crystal structure, dielectric response, and molecular motion. It was found that crystals with different halogen atoms exhibited in- and out-of-plane pendulum motions, which could not be detected by dielectric measurements due to the semiconducting nature of the crystals.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Chemistry, Multidisciplinary
Fengling Zhang, Jingning Lai, Zhengqiang Hu, Anbin Zhou, Huirong Wang, Xin Hu, Lijuan Hou, Bohua Li, Wen Sun, Nan Chen, Li Li, Feng Wu, Renjie Chen
Summary: In this study, a dilute electrolyte containing crown ether additives was tailored to improve the performance of lithium-oxygen batteries (LOBs) by promoting lithium salt dissociation and solvation of Li+ ions. This electrolyte exhibited enhanced electrochemical stability and triggered a solution-mediated Li2O2 growth pathway, leading to a high discharge capacity of 10 828.8 mAh g(carbon)(-1). Furthermore, optimized electrode/electrolyte interfaces promoted the kinetics of oxygen reduction/evolution reactions (ORR/OER) and achieved a dendrite-free Li anode, improving the cycle life of LOBs.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Quentin De Roover, Timothe Vucko, Stephane P. Vincent, Julien De Winter, Olivier Coulembier
Summary: The azobenzene-bridged 15-crown-5 ether was successfully utilized as a photoswitchable cocatalyst to modulate the catalytic activity of potassium acetate in the ring-opening polymerization of L-lactide. By alternating exposure to daylight and UV light, the ion pair-like structure of KOAc was transformed on-demand, resulting in effective modulation of the polymerization speed from slow to fast.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Sichen Gu, Si-Wei Zhang, Junwei Han, Yaqian Deng, Chong Luo, Guangmin Zhou, Yanbing He, Guodan Wei, Feiyu Kang, Wei Lv, Quan-Hong Yang
Summary: By adding rubidium nitrate additive coordinated with 18-crown-6 crown ether to the carbonate electrolyte, the stability of lithium metal anodes can be improved, leading to higher Coulombic efficiency and better battery performance.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Inorganic & Nuclear
Maxime A. Bonnin, Claus Feldmann
Summary: Crown-ether coordination compounds with Mn2+ and Sn2+ cations and various ligands were synthesized and compared for their luminescence properties and quantum yields. The coordination of the cations by crown ethers and their structural features were found to influence the luminescence efficiency, providing insights into conditions for intense emission and high quantum yields.
INORGANIC CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
Yong-Pan Tian, Cheng-Cheng Wang, Fan Zhang, Sen Huang, Liang Xu, Zhuo Zhao, Bi-Hai Tong
Summary: Lithium, as a primary component of batteries, plays a critical role in economic growth. The presence of sodium ions in Li+ separation and enrichment can be addressed using crown ethers that selectively adsorb Li+ due to the size-matching effect. 1,8-dihydroxyl-4,4,5,5-tetramethylbenzo-14-crown-4 was synthesized and employed to extract lithium from a Li+/Na+ mixed solution, with interactions primarily driven by electrostatic attraction and enhanced by van der Waals interactions. The adsorption selectivity for Li+ is influenced by the number of ether oxygen atoms interacting with Li+. The addition of butyrate acid root promotes Li+ extraction efficiency but decreases Li+/Na+ separation coefficient.
Article
Nanoscience & Nanotechnology
Liang Ma, Xiao Han, Shengping Zhang, Zhiyang Zeng, Ruiyang Song, Xiaobo Chen, Dandan Hou, Luda Wang
Summary: Inspired by biological Na+ channels, researchers have developed a metal-organic framework that can precisely regulate ion transport at the nanoscale. Through molecular encapsulation, the device efficiently separates different metal ions and exhibits high Li+ conductivity. This study opens up new avenues for the development of efficient ion transport devices and biosensors.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Qi Zhang, Yuke Li, Eng Tuan Poh, Zhenxiang Xing, Mingsheng Zhang, Meng Wang, Zejun Sun, Jisheng Pan, Sai Vikrama Chaitanya Vummaleti, Jia Zhang, Wei Chen
Summary: In this study, benzo-crown ethers (BCEs) with varying cavity sizes are used as electrolyte additives to promote the growth of Li2O2 in Li-O-2 batteries. The cell with benzo-18-crown-6 ether (B18C6) exhibits the highest discharge capacity of 14948 mAh g(-1). These additives accelerate Li2O2 oxidation, improve reversibility, reduce charge overpotential, and prolong cycle life. Additionally, they also stabilize the Li anode by regulating Li+ migration and electron exchange, reducing dendritic growth and anode corrosion. This work provides insights into designing BCEs as additives for high-performance LOBs.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Xin Chen, Rui-Kang Huang, Kiyonori Takahashi, Shin-ichiro Noro, Takayoshi Nakamura, Ichiro Hisaki
Summary: A rigid hydrogen-bonded organic framework was constructed using a flexible macrocyclic structure and directional intermolecular hydrogen bonding, showing proton conductivity with 1D channels. This unique water channel structure provides inspiration for creating molecular porous materials.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Organic
Apoorva Malik, Pragati R. Sharma, Rakesh K. Sharma
Summary: We report a class of quaternary ammonium Cinchona-functionalized crown ether-strapped calix[4]-arene phase-transfer catalysts for the efficient enantioselective alpha-alkylation of glycine imines. The catalyst exhibits excellent catalytic performance at 0.1 mol % catalytic loading, affording the desired alpha-alkylated glycinates with 98% yield and 99.9% ee. The catalyst could be recovered and recycled up to 30 test cycles without a significant drop in activity.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Bing Liu, Yongzhong Jia, Zezheng Zhang, Huaxin Sun, Ying Yao, Yan Jing, Mixiang Qi, Quanyou Zhang
Summary: The study focuses on solvent extraction separation of lithium isotopes using a one-step synthesis of an ionic liquid to improve extraction efficiency and separation factor. By introducing a multi-stage extraction process, the research aims to enhance lithium isotope separation performance. The results demonstrate the possibility of achieving large enrichment of Li-6(+) through the new stripping cross-flow multistage method.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Multidisciplinary
Kai Sheng, Ya-Nan Liu, Rakesh Kumar Gupta, Mohamedally Kurmoo, Di Sun
Summary: A novel octanuclear Zn(II) nanocage has been designed and synthesized with reversible photoswitching behavior, showing quick trans-to-cis transformation upon 365 nm light irradiation and slow cis-to-trans reversibility at room temperature. This material can be considered as a molecular pump energized by light, acting as an energy reservoir that absorbs light energy and releases it slowly with time.
SCIENCE CHINA-CHEMISTRY
(2021)
Article
Multidisciplinary Sciences
Khushboo Bhanderi, Prasanna S. Ghalsasi, Katsuya Inoue
Summary: By conducting experiments in different types of tubes, it was observed that metal oxide Ag-0 forms particles in polymer tubes while films in glass tubes. Changing the surface material of the reaction flask to promote the formation of oxidative C-C bonds revealed that the formation of silver particles is influenced by Ag...Ag cohesive interaction.
SCIENTIFIC REPORTS
(2021)
Article
Environmental Sciences
Erik Prasetyo, Kazuhiro Toyoda
Summary: A low-cost adsorbent material was prepared by immobilizing humic acid on a silica gel surface coated with cross-linked chitosan. The adsorbent showed high selectivity for Th(IV) and U(VI) removal, with stable performance over a wide pH range. The Langmuir model yielded maximum capacity values, and the adsorption process was rapid and best described by a pseudo-second order rate equation. The adsorbent could be used for multiple cycles without significant capacity loss, and sequential separation of Th(IV) and U(VI) was achieved using ammonium citrate and nitric acid elution.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Chemistry, Physical
Xu Zhang, Kai Zhao, Xu Peng, Mohamedally Kurmoo, Ming-Hua Zeng
Summary: The study focuses on the relationship among hierarchical structure, chemical reaction, and precision preparation for materials, proposing a packing mode analysis to understand the evolution process in high-temperature reactions. Through real-time tracking using thermogravimetry-mass spectrometry, the pyrolysis process and electrochemical performance of the resulting materials are precisely analyzed, showing promising results for further exploration of structure-performance relationships.
Article
Geochemistry & Geophysics
Kazuhiro Toyoda, Shota Nakano, Shunitz Tanaka, Kawawa Banda, Imasiku A. Nyambe, Tsuyoshi Ishikawa, Shouta Nakayama, Mayumi Ishizuka
Summary: The town of Kabwe has suffered severe lead pollution due to mining activities. Water and soil samples confirm that the lead pollution is derived from the tailings deposit, with the lead mainly entering the well water through aeolian dust.
APPLIED GEOCHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Kun Fan, Song-Song Bao, Zi-Wen Yu, Xin-Da Huang, Yu-Jie Liu, Mohamedally Kurmoo, Li-Min Zheng
Summary: In this study, three heteronuclear Ir-III-Co-II arrays have been synthesized, where compounds 2 and 3 are discrete ionic complexes and compound 4 consists of a self-assembled two-dimensional coordination polymer. The Co-II cores in all arrays exhibit octahedral geometries with varying degrees of distortion. Additionally, these arrays show slow magnetic relaxation and solid-state phosphorescence, with compound 4 exhibiting severely quenched phosphorescence due to strong connections between the Co center and the metalloligand.
CHINESE JOURNAL OF CHEMISTRY
(2022)
Article
Physics, Applied
Chisato Kobukai, Momo Tadai, Tamaki Nishimura, Kohei Hattori, Sadafumi Nishihara, Shuji Okada, Yoko Tatewaki
Summary: A metallosupramolecular cage-shaped compound was synthesized and found to exhibit aggregation-induced emission in solution.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Seiya Shimono, Hiroki Ishibashi, Yusuke Nagayoshi, Hidekazu Ikeno, Shogo Kawaguchi, Masato Hagihala, Shuki Torii, Takashi Kamiyama, Katsuya Ichihashi, Sadafumi Nishihara, Katsuya Inoue, Yui Ishii, Yoshiki Kubota
Summary: A structural transition from a cubic phase to a tetragonal phase was observed in non-centrosymmetric oxyfluoride Co3Sb4O6F6 at around 180K. The transition was confirmed through specific heat, magnetization, and dielectric measurements, and a magnetic structure analysis revealed a transition from a paramagnetic phase to a G-type antiferromagnetic phase at around 67K.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Multidisciplinary Sciences
Zhi Wang, Yan-Jie Zhu, Ying-Zhou Li, Gui-Lin Zhuang, Ke-Peng Song, Zhi-Yong Gao, Jian-Min Dou, Mohamedally Kurmoo, Chen-Ho Tung, Di Sun
Summary: This study reports the structural transformations of silver nanoclusters under different ligand templates and demonstrates that the transformations can be achieved through reactions with specific ligands. The findings provide a powerful method for synthesizing metal nanoclusters and infinite networks, and have the potential to evolve from trial-and-error to rational synthesis.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Yan-Li Gao, Yufei Wang, Liguo Gao, Jian Li, Yali Wang, Katsuya Inoue
Summary: Two novel cocrystal Mn-II compounds were successfully synthesized, forming three-dimensional supramolecular architectures through extensive intramolecular H-bonds and halogen bonds.
Article
Biochemistry & Molecular Biology
Kseniya Maryunina, Gleb Letyagin, Galina Romanenko, Artem Bogomyakov, Vitaly Morozov, Sergey Tumanov, Sergey Veber, Matvey Fedin, Evgeniya Saverina, Mikhail Syroeshkin, Mikhail Egorov, Victor Ovcharenko
Summary: Two new 2-imidazoline nitroxide derivatives were synthesized, which showed high kinetic stability and similar structural, magnetic, and electrochemical properties to Re(I) analogs. These findings open up possibilities for using these derivatives as new materials for combined therapy and diagnosis.
Article
Multidisciplinary Sciences
Aye Myint Myat Soe, Aye Aye Mu, Kazuhiro Toyoda
Summary: The presence of potentially toxic metal(loid)s in white rice grains purchased from farmers near Yangon was determined, and the concentrations of certain metals (e.g. As, Ni) were found to be within the average range. The mean concentrations of Pb, Cd, and Cr were lower than the maximum allowable levels. The study suggests that consumers of Yangon rice from paddy fields without groundwater irrigation may need to be concerned about the potential risk of Ni intake besides arsenic.
Article
Chemistry, Inorganic & Nuclear
Sergey L. Veber, Alexey N. Ponomaryov, Kseniya Yu. Maryunina, Artem S. Bogomyakov, Victor I. Ovcharenko, Sergei A. Zvyagin, Matvey V. Fedin, Sergey L. Veber
Summary: Copper(ii)-nitroxide based Cu(hfac)(2)L-R compounds exhibit unusual magnetic behavior that can be induced by various stimuli. The magnetic phenomena observed in Cu(hfac)(2)L-R are similar to classical spin-crossover behavior, originating from polynuclear exchange-coupled spin clusters Cu2+-O-center dot-N< or >N-O-center dot-Cu2+-O-center dot-N<. These peculiarities make Cu(hfac)(2)L-R compounds promising materials for spintronic applications.
DALTON TRANSACTIONS
(2023)
Article
Materials Science, Multidisciplinary
Masaki Mito, Takayuki Tajiri, Yusuke Kousaka, Yoshihiko Togawa, Jun Akimitsu, Jun-ichiro Kishine, Katsuya Inoue
Summary: We report on the magnetostriction effects in the paramagnetic state of the chiral magnet CrNb3S6, showing that these effects are influenced by the strength and direction of the magnetic field. The study reveals the sensitivity of the symmetry of the CrS6 octahedron to the magnetic field even at room temperature.
Article
Chemistry, Inorganic & Nuclear
Yan-Li Gao, Sadafumi Nishihara, Takashi Suzuki, Kazunori Umeo, Katsuya Inoue, Mohamedally Kurmoo
Summary: This study investigates the synthesis and properties of two one-dimensional coordination polymers, and finds differences in their magnetic susceptibility and phase transition behavior.
DALTON TRANSACTIONS
(2022)