Article
Chemistry, Physical
Gabriel Sikukuu Nambafu, Kumar Siddharth, Cheng Zhang, Tianshou Zhao, Qing Chen, Khalil Amine, Minhua Shao
Summary: This work demonstrates the performance of a bifunctional redox active material, RIBOTEMPO, composed of low-cost riboflavin organic molecule and TEMPO radical molecule in symmetric redox flow batteries, showing promising results for large scale energy storage applications.
Article
Chemistry, Physical
Donghan Xu, Cuijuan Zhang, Yihan Zhen, Yongdan Li
Summary: Ionic BROMs based on ferrocene and phthalimide moieties were synthesized to improve the solubility and ionic conductivity, consequently enhancing the stability and cycling performance of NARFB. This work demonstrates a promising molecular engineering strategy to enable the high-current operation and cycling stability of symmetric NARFB.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Organic
Lena Steuer, Elisabeth Kaifer, Hans-Joerg Himmel
Summary: The first synthesis of redox-active dendrimer-like oligoguanidines was reported, which showed stable redox states and exhibited good performance in catalytic reactions.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Xueyi Chang, Yongfu Qiu, Zhiyu Cheng, Qun Luo, Guiping Tan, Biye Ren
Summary: To investigate the impact of topological structure on the performance of electrodes in supercapacitors, redox-active triblock copolymers PFcn-b-PEG-b-PFcn (n = 10, 17, 28) with different ratios of hydrophilic and hydrophobic moieties were synthesized and applied as electrode materials. It was found that increasing the value of n from 10 to 28 led to an increase in the specific capacitances of PFcn-b-PEG-b-PFcn. The PFc28-b-PEG-b-PFc28 copolymer demonstrated a specific capacitance of 358 F g-1 and a 5% capacitance decay after 2000 cycles, indicating its high capacitance performance and long cycle life. The favorable redox environment, faster electron transport, and better ion diffusion of the ferrocenyl groups in PFc28-b-PEG-b-PFc28 contributed to its superior performance. Furthermore, PFc28-b-PEG-b-PFc28 was successfully used to assemble a simple asymmetric solid-state supercapacitor.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Hui Chen, Zhihui Niu, Jing Ye, Changkun Zhang, Xiaohong Zhang, Yu Zhao
Summary: Nonaqueous redox flow batteries (NARFBs) hold promise as electrochemical energy storage systems, but the limited solubility of redox-active materials like ferrocene derivatives in nonaqueous phase needs to be addressed. The study introduces a multicore ferrocene derivative, DFDE, with tailored ether chain and multiple ferrocene cores, showing high solubility and improved redox potential compared to pristine ferrocene, enhancing energy density of NARFBs. Electrochemical characterizations reveal DFDE undergoes highly reversible redox reactions with fast electron-transfer rate, leading to stable cycling performance in a cell paired with N-butyl-phthalimide (BuPh).
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Jian Luo, Bo Hu, Maowei Hu, Wenda Wu, T. Leo Liu
Summary: In this study, a zinc-ferrocene salt compound was reported as an electrolyte material for energy-dense redox-flow batteries. The electrolyte material exhibited high energy efficiency and power density at high current densities. Additionally, the flow battery demonstrated high energy density and excellent capacity retention.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Mangmang Shi, Cheng Peng, Xiaoyan Zhang
Summary: Asymmetric supercapacitors (ASCs) have been designed to increase the voltage window and energy density of supercapacitors by using two dissimilar electrode materials. In this study, the combination of redox-active organic molecule (pyrene-4,5,9,10-tetraone) with graphene-based materials resulted in a high capacity electrode. The assembled ASC using PYT-functionalized graphene as cathode and annealed-Ti3C2Tx MXene as anode achieved an outstanding energy density of 18.4 Wh kg(-1) at a power density of 700 W kg(-1). PYT-functionalized graphene shows great potential for high-performance energy storage devices.
Article
Energy & Fuels
Sabrina Berling, Jose Manuel Hidalgo, Nagaraj Patil, Enrique Garcia-Quismondo, Jesus Palma, Carlos Ponce de Leon
Summary: In this study, a stability enhanced vanadium catholyte with the addition of lignin was introduced to improve the performance of VRFB systems in thermal applications. By reducing the vanadium concentration to 0.9 M, the stability of the catholyte was significantly improved, allowing for a wider operational temperature window. Lignin was used as a solid capacity booster to compensate for the loss in energy density, achieving volumetric capacities >28 Ah L-1 that are comparable to conventional vanadium electrolyte.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Engineering, Chemical
Prerana Sharma, Sonu Kumar, Mani Bhushan, Vinod K. Shahi
Summary: Understanding the synergetic and trade-off behavior between chemical and structural properties of emerging redox active membrane separators is crucial for high performance batteries. The redox active anion exchange membranes with ferrocene responsive species demonstrate excellent ionic transport and stability, showing great potential for improved vanadium redox flow battery performance.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Multidisciplinary Sciences
Hyun-Myung Woo, Omar Allam, Junhe Chen, Seung Soon Jang, Byung-Jun Yoon
Summary: As the global interest in renewable energy grows, there is a need for new energy storage devices based on organic electrode materials to overcome the limitations of current lithium-ion batteries. This study proposes a computational framework for designing and optimizing a high-throughput virtual screening pipeline to quickly identify organic materials that meet specific design criteria. By constructing a set of surrogate models with varying accuracy and complexity, starting from a high-fidelity model, the research demonstrates that the proposed pipeline significantly improves screening efficiency.
Article
Polymer Science
Leo Delage-Laurin, Harrison K. S. Young, Etienne A. LaPierre, Molly C. Warndorf, Ian Manners, Timothy M. Swager
Summary: This study investigates the Faraday rotation of two poly di-tert-butylferrocenium compounds with different linkers. The results show that thin films of oxidized poly[(1,1'-di-tert-butylferrocenyl)diphenylsilane] display a 30% increase in maximum Verdet constant compared to previous reports.
Article
Chemistry, Multidisciplinary
Elarbi Chatir, Martial Boggio-Pasqua, Frederique Loiseau, Christian Philouze, Guy Royal, Saioa Cobo
Summary: This article discusses the functionalization of a phenanthrene unit with methylthiophene units to achieve photochromic behavior, potentially leading to a new generation of organic field-effect transistors.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Elarbi Chatir, Martial Boggio-Pasqua, Frederique Loiseau, Christian Philouze, Guy Royal, Saioa Cobo
Summary: The functionalization of a phenanthrene unit with methylthiophene units has led to the development of compounds with photochromic behavior, which could potentially pave the way for a new generation of organic field-effect transistors.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Polymer Science
Seyyed Mohsen Beladi-Mousavi, Lorenz Walder
Summary: Modern society depends heavily on rechargeable batteries for portable electronics, which need to meet the requirements of fast charging, durability, and environmental friendliness. Organometallic battery materials offer interesting alternatives with characteristics such as ultrafast charging, flexibility, compatibility, and tunable cell voltage.
Article
Chemistry, Medicinal
Hongxia Li, Jiayong Liu, Chuan-Fa Liu, Haizhou Li, Jiachun Luo, Shanfang Fang, Yongzhi Chen, Rongcui Zhong, Shouping Liu, Shuimu Lin
Summary: This study designed and synthesized a series of new membrane-active bakuchiol derivatives, with compound 28 showing potent antibacterial activity against various bacteria and strong in vivo antibacterial efficacy in murine corneal infection models. This design strategy is expected to provide an effective solution to the antibiotic crisis.
JOURNAL OF MEDICINAL CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Ryojun Toyoda, Naoya Fukui, Dionisius H. L. Tjhe, Ekaterina Selezneva, Hiroaki Maeda, Cedric Bourges, Choon Meng Tan, Kenji Takada, Yuanhui Sun, Ian Jacobs, Kazuhide Kamiya, Hiroyasu Masunaga, Takao Mori, Sono Sasaki, Henning Sirringhaus, Hiroshi Nishihara
Summary: This study investigates the use of mixed nickel and copper ions to fabricate coordination nanosheet films based on benzenehexathiolato (BHT). It is found that this heterometallicity results in improved crystallinity and electrical conductivities in the films. Spectroscopic and scattering measurements confirm the formation of a bilayer structure with larger and more oriented grains. These findings open new opportunities for improving the functional properties of 2D coordination nanosheets.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Yohei Hattori, Ryota Kitajima, Ryota Matsuoka, Tetsuro Kusamoto, Hiroshi Nishihara, Kingo Uchida
Summary: The luminescence of stable radicals can be enhanced by coordination to metal complexes. The fluorescence quantum yield of F2PyBTM radical in dichloromethane was increased from 4% to 36% by coordination to Au-I metal complex with N-heterocyclic carbene ligand, setting a record for metal-radical complexes.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Tetsuro Kusamoto, Chie Ohde, Shiori Sugiura, Satoshi Yamashita, Ryota Matsuoka, Taichi Terashima, Yasuhiro Nakazawa, Hiroshi Nishihara, Shinya Uji
Summary: In this study, a newly synthesized organic quantum spin liquid (QSL) was investigated for its structure and physical properties. The antiferromagnetic interaction in this QSL was found to be smaller than that in other organic QSLs, while the chi(0) and gamma values were larger. The results provide evidence of the spinon Fermi surface in the QSLs.
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
(2022)
Article
Biochemistry & Molecular Biology
Hisanori Muramatsu, Tetsuya Kambe, Takamasa Tsukamoto, Takane Imaoka, Kimihisa Yamamoto
Summary: This study proposes a method for synthesizing thiol-protected gold clusters using a dendrimer template, which successfully controls the number of Au atoms and synthesis speed. In addition, hybridization of Au-25 superatoms was achieved through the control of metal complexation.
Article
Multidisciplinary Sciences
Minori Inazu, Yuji Akada, Takane Imaoka, Yoko Hayashi, Chinami Takashima, Hiromi Nakai, Kimihisa Yamamoto
Summary: This study directly observes and records the formation and dissociation of unstable dimers and trimers in real time using scanning transmission electron microscopy combined with elemental identification, filling the gaps in previous experiments at atomic resolution.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Jingyan Guan, Tigmansu Pal, Kazuhide Kamiya, Naoya Fukui, Hiroaki Maeda, Tetsu Sato, Hajime Suzuki, Osamu Tomita, Hiroshi Nishihara, Ryu Abe, Ryota Sakamoto
Summary: This study demonstrates that a fully pi-conjugated and conductive two-dimensional metal-organic framework (2D MOF) serves as an ideal candidate for hydrogen evolution reaction (HER) cocatalyst, with low stability and suppressing back reactions related to oxygen reduction reactions.
Article
Chemistry, Multidisciplinary
Quan Zou, Yuji Akada, Akiyoshi Kuzume, Masataka Yoshida, Takane Imaoka, Kimihisa Yamamoto
Summary: This study demonstrates that subnanoscale alloying is always effective for inter-elemental synergy in metal catalysts. The combination of Pt and Zr exhibits the greatest synergistic effect. The atomic-scale miscibility and modulation of electronic states at the subnanoscale are different from those at the nanoscale.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Editorial Material
Chemistry, Multidisciplinary
J. Komeda, K. Takada, H. Maeda, N. Fukui, T. Tsuji, H. Nishihara
Summary: This article features the research of Hiroshi Nishihara's group at Tokyo University of Science, highlighting the growth of a heterolaminated film at the liquid-liquid interface.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Joe Komeda, Kenji Takada, Hiroaki Maeda, Naoya Fukui, Takuya Tsuji, Hiroshi Nishihara
Summary: Recent studies have mainly focused on the discovery of new precursors for molecular 2D materials with high tunability of structure and function. This study demonstrates a facile one-pot synthesis of laminated 2D coordination polymer films and provides insights into their structure and charge transfer properties. The bilayer film shows stable rectification character in a dry condition.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Organic
Hiroto Miyabe, Mizuha Ujita, Masaki Nishio, Toyotaka Nakae, Tsukasa Usuki, Minako Ikeya, Chika Nishimoto, Suguru Ito, Mineyuki Hattori, Satoshi Takeya, Shigenobu Hayashi, Daisuke Saito, Masako Kato, Hiroshi Nishihara, Teppei Yamada, Yoshinori Yamanoi
Summary: A series of octamethyltetrasilanes with different donor and acceptor groups were prepared and their optical properties were studied. Two compounds showed dual emission behavior in solution and reversible photoluminescent change under mechanical and thermal stimuli in the solid state.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Dong Xia, Ken Sakaushi, Andrey Lyalin, Keisuke Wada, Sonu Kumar, Marco Amores, Hiroaki Maeda, Sono Sasaki, Tetsuya Taketsugu, Hiroshi Nishihara
Summary: This study demonstrates the potential of bis(diimino)copper framework for reversible multielectron transfer in electrochemical energy storage. An experiment-theory collaboration reveals the importance of cation-anion interactions in non-oxide abundant electrode systems. It is found that the copper-nitrogen bonds undergo a unique reversible rearrangement during lithium intercalation, leading to significant multielectron transfer. This research provides new insights into affordable multielectron transfer electrodes and presents an alternative strategy for advancing electrochemical energy storage reactions.
Review
Chemistry, Inorganic & Nuclear
Takane Imaoka, Akiyoshi Kuzume, Makoto Tanabe, Takamasa Tsukamoto, Tetsuya Kambe, Kimihisa Yamamoto
Summary: Miniaturizing metallic materials from the nanoscale to the atomic scale transforms their structures and physical properties. Some sub-nanoscale catalysts exhibit higher activity than conventional nanoparticle catalysts, and certain subnanoparticles become superatoms with unique physical properties deviating from those of the original elements. However, conventional metallurgy and chemistry do not always apply to the synthesis, structural analysis, and functional design of materials at the sub-nanoscale due to the disappearance of crystal structures. This review focuses on atom hybridization, a series of materials research that involves hybridizing atoms to create desired materials for various applications.
COORDINATION CHEMISTRY REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Augie Atqa, Masataka Yoshida, Masanori Wakizaka, Wang-Jae Chun, Akira Oda, Takane Imaoka, Kimihisa Yamamoto
Summary: We propose a partially-oxidised bimetallic Mo-Pt subnanoparticle (Mo4Pt8Ox) that facilitates thermally-driven CO2 hydrogenation to CO at room temperature and atmospheric pressure. A mechanistic study elucidated the entire catalytic cycle of the reaction, from CO2 activation to catalyst reactivation. DFT calculations showed that alloying with Mo decreases the activation barrier by weakening CO adsorption, presenting a potential pathway for low-energy CO2 conversion.
CHEMICAL COMMUNICATIONS
(2023)
Review
Chemistry, Inorganic & Nuclear
Tetsuya Kambe, Hiroshi Nishihara, Kimihisa Yamamoto
Summary: This article presents a chemical bottom-up approach for synthesizing single-atomic-layered materials like graphene, focusing on borophene-oxide and metalladithiolene layers. These inorganic materials have graphene-like two-dimensional networks that allow for introducing functionalities, and their atomically thin layers can be obtained through dissolution or synthetic methods. The article also evaluates their two-dimensional electronic features, such as the anisotropic characteristics of borophene-oxide layers and the switching abilities of metalladithiolene layers. Evaluating its importance, I would give a rating of 9 out of 10.
DALTON TRANSACTIONS
(2023)
Article
Polymer Science
Hiroaki Maeda, Kenji Takada, Naoya Fukui, Junzo Ukai, Nobutaka Honma, Sono Sasaki, Hiroyasu Masunaga, Kenichi Kato, Hiroshi Nishihara
Summary: Multilayered coordination nanosheets composed of copper ions and hexaaminobenzene (CuHAB) were synthesized through a liquid-liquid interfacial reaction. The study found that an appropriate oxidizing agent and quantitative addition of base can modulate the chemical structure, crystal structure, and conductivity of the synthesized nanosheets.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2023)