研究者詳細 - 吉田　健文

論文 - 吉田　健文

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Unsupervised Machine Learning-Based Image Recognition of Raw Infrared Spectra: Toward Chemist-like Chemical Structural Classification and Beyond Numerical Data

Kentarou Fuku, Takefumi Yoshida (担当区分：最終著者,　責任著者 )

Journal of Chemical Information and Modeling ( American Chemical Society (ACS) ) 2025年03月 [査読有り]

DOI

First Encapsulation of Organometallic Single‐Molecule Magnet into Single‐Walled Carbon Nanotubes

Haitao Zhang, Ryo Nakanishi, Takefumi Yoshida, Masahiko Nishijima, Koji Harano, Yoji Horii, Masahiro Yamashita

Angewandte Chemie International Edition ( Wiley ) 2025年03月 [査読有り]

An air‐sensitive DyCp3 (Cp− = cyclopentadienyl) single‐molecule magnet (SMM) complex (1) was encapsulated into single‐walled carbon nanotubes (SWCNTs) to construct hybrid materials that are resistant to moisture and oxygen. The hybrid materials with independent slow‐magnetic‐relaxing centers are expected to become a key component of the next generation of information process devices based on spintronics. The resilience to moisture and oxygen further broadens its manufacturing methods and application scenarios. Furthermore, upon encapsulation into SWCNTs, DyCp3 exhibited clear ac frequency dependence in the ac magnetic susceptibility at a zero‐dc field. This indicates that the guest molecule's slow magnetic relaxation properties are preserved, which is crucial and necessary to realize SMMs‐based quantum information processing, by allowing a sufficient time window for quantum gate operations. Our result exemplifies that encapsulation of air‐sensitive organometallic SMMs into SWCNTs enhances their chemical stability and their magnetic relaxation time at a zero‐dc magnetic field, which provides a novel method for their further applications.

DOI

Double Core–Shell Semiconducting Molecular Chain Halogen-Bridged Metal Complexes with Ohmic Contact Heterojunctions

Masanori Wakizaka, Keisuke Ishiguro, Takefumi Yoshida, Hiroaki Iguchi, Takao Tsumuraya, Hiroshi Ito, Masahiro Yamashita, Shinya Takaishi

ACS Applied Materials & Interfaces ( American Chemical Society (ACS) ) 17 ( 9 ) 14322 - 14328 2025年02月 [査読有り]

DOI

Exploration of the synthesis, crystal structure, Hirshfeld surface analysis, binding properties, antibacterial activities, and molecular docking of a Schiff base nickel (II) Complex

A.B.M. Nazmul Isalm, Md. Ahsan Habib, Md. Mahadi Hasan, Md. Rafid Hasan, Kaykobad Md. Rezaul Karim, Md. Mahiuddin, Takefumi Yoshida, Md. Rabiul Karim, Shofiur Rahman, Hamad Albrithen, Abdullah N. Alodhayb, Paris E. Georghiou

Journal of Molecular Structure ( Elsevier BV ) 1322 140294 - 140294 2025年02月 [査読有り]

DOI

Transient Kinetic QXAFS Approach for Understanding the RDE–MEA Gap in Fuel Cell (Oxygen Reduction Reaction) Performances of Pt-Based Electrocatalysts

Takefumi Yoshida, Shinobu Takao, Hiroko Ariga-Miwa, Xiao Zhao, Gabor Samjeské, Takuma Kaneko, Tomoya Uruga, Yasuhiro Iwasawa (担当区分：筆頭著者 )

ACS Omega ( American Chemical Society (ACS) ) 2025年01月 [査読有り]

DOI

Hydrogen isotope separation at exceptionally high temperature using an unsaturated organometallic complex

Taku Kitayama, Tamon Yamauchi, Kaiji Uchida, Shunya Tanaka, Ryojun Toyoda, Hiroaki Iguchi, Ryota Sakamoto, Hao Xue, Naoki Kishimoto, Takefumi Yoshida, Tomoya Uruga, Shin-ichiro Noro, Shinya Takaishi

Dalton Transactions ( Royal Society of Chemistry (RSC) ) 2025年 [査読有り]

DOI

Tailoring Co site reactivity via Sr and Ni doping in LaCoO3 for enhanced water splitting performance

Saraswati Roy, Takefumi Yoshida, Amit Kumar, Seikh Mohammad Yusuf, Chanchal Chakraborty, Sounak Roy

Catalysis Today ( Elsevier BV ) 441 114885 - 114885 2024年11月 [査読有り]

DOI

Pyrolytic Depolymerization of Polyolefins Catalysed by Zirconium‐based UiO‐66 Metal–Organic Frameworks

Jerry Zhi Xiong Heng, Tristan Tsai Yuan Tan, Xin Li, Wei Wei Loh, Yuting Chen, Zhenxiang Xing, Zhiyan Lim, Jennet Li Ying Ong, Katherine Shiyun Lin, Yusuke Nishiyama, Takefumi Yoshida, Lili Zhang, Ken‐ichi Otake, Susumu Kitagawa, Xian Jun Loh, Enyi Ye, Jason Y. C. Lim

Angewandte Chemie International Edition ( Wiley ) 2024年09月 [査読有り]

Abstract

Polyolefins such as polyethylenes and polypropylenes are the most‐produced plastic waste globally, yet are difficult to convert into useful products due to their unreactivity. Pyrolysis is a practical method for large‐scale treatment of mixed, contaminated plastic, allowing for their conversion into industrially‐relevant petrochemicals. Metal–organic frameworks (MOFs), despite their tremendous utility in heterogeneous catalysis, have been overlooked for polyolefin depolymerization due to their perceived thermal instabilities and inability of polyethylenes and polypropylenes to penetrate their pores. Herein, we demonstrate the viability of UiO‐66 MOFs containing coordinatively‐unsaturated zirconium nodes, as effective catalysts for pyrolysis that significantly enhances the yields of valuable liquid and gas hydrocarbons, whilst halving the amounts of residual solids produced. Reactions occur on the Lewis‐acidic UiO‐66 nodes, without the need for noble metals, and yield aliphatic product distributions distinctly different from the aromatic‐rich hydrocarbons that can be obtained from zeolite catalysis. We also demonstrate the first unambiguous characterization of polyolefin penetration into UiO‐66 pores at pyrolytic temperatures, allowing access to the abundant Zr‐oxo nodes within the MOF interior for efficient C−C cleavage. Our work highlights the potential of MOFs as highly‐designable heterogeneous catalysts for depolymerisation of plastics, which can complement conventional catalysts in reactivity.

DOI

Unraveling High Chemoselectivity in Oxidative Dehydration of Glycerol into Acrylic Acid over a Bifunctional Metal–Organic Framework–Polyoxometalate Composite Catalyst

Paramita Koley, Subhash Chandra Shit, Takefumi Yoshida, Hiroko Ariga-Miwa, Tomoya Uruga, Tayebeh Hosseinnejad, Selvakannan Periasamy, Wooyul Kim, Dharmendra D. Mandaliya, Ravindra D. Gudi, Yasuhiro Iwasawa, Suresh K. Bhargava

ACS Catalysis ( American Chemical Society (ACS) ) 14 ( 16 ) 12110 - 12127 2024年07月 [査読有り]

DOI

Unsupervised Raw IR Spectra Images Recognition: Toward Chemist-Like Chemical Structure Classification

Kentarou Fuku, Takefumi Yoshida

ChemRxiv ( American Chemical Society (ACS) ) 2024年05月

DOI

Subnanometric Osmium Clusters Confined on Palladium Metallenes for Enhanced Hydrogen Evolution and Oxygen Reduction Catalysis

P Prabhu, Viet-Hung Do, Takefumi Yoshida, Yingtang Zhou, Hiroko Ariga-Miwa, Takuma Kaneko, Tomoya Uruga, Yasuhiro Iwasawa, Jong-Min Lee

ACS Nano ( American Chemical Society (ACS) ) 2024年03月 [査読有り]

DOI

Spin Dynamics Phenomena of a Cerium(III) Double-Decker Complex Induced by Intramolecular Electron Transfer

Keiichi Katoh, Kana Kobayashi, Michiyuki Suzuki, Tetsu Sato, Yoji Horii, Takefumi Yoshida, Brian. K. Breedlove, Masahiro Yamashita

Dalton Transactions ( Royal Society of Chemistry (RSC) ) 2024年 [査読有り]

DOI

Pd Nanoparticles on the Outer Surface of Microporous Aluminosilicates for the Direct Alkylation of Benzenes using Alkanes

Satoshi Misaki, Hiroko Ariga-Miwa, Takashi U. Ito, Takefumi Yoshida, Shingo Hasegawa, Yukina Nakamura, Shunta Tokutake, Moe Takabatake, Koichiro Shimomura, Wang-Jae Chun, Yuichi Manaka, Ken Motokura

ACS Catalysis ( American Chemical Society (ACS) ) 12281 - 12287 2023年09月 [査読有り]

DOI

Reversible Electrochromic/Electrofluorochromic Dual Switching in Zn(II)-Based Metallo-Supramolecular Polymer Films

Sanjoy Mondal, Dines Chandra Santra, Susmita Roy, Yemineni S. L. V. Narayana, Takefumi Yoshida, Yoshikazu Ninomiya, Masayoshi Higuchi

ACS Applied Materials & Interfaces ( American Chemical Society (ACS) ) 15 ( 36 ) 42912 - 42919 2023年08月 [査読有り]

DOI

Elucidation of Active Sites and Mechanistic Pathways of a Heteropolyacid/Cu-Metal–Organic Framework Catalyst for Selective Oxidation of 5-Hydroxymethylfurfural via Ex Situ X-ray Absorption Spectroscopy and In Situ Attenuated Total Reflection-Infrared Studies

Paramita Koley, Subhash Chandra Shit, Takefumi Yoshida, Hiroko Ariga-Miwa, Tomoya Uruga, Tayebeh Hosseinnejad, Selvakannan Periasamy, Su-Il In, Dharmendra D. Mandaliya, Ravindra D. Gudi, Yasuhiro Iwasawa, Suresh K. Bhargava

ACS Catalysis ( American Chemical Society (ACS) ) 13 ( 9 ) 6076 - 6092 2023年04月 [査読有り]

DOI

Data Mining from XANES Spectra of Nickel Complexes for Structure Estimation

Kentaro Fuku, Takefumi Yoshida, Tetsu Sato, Hiroaki Iguchi, Shinya Takaishi, Ryota Sakamoto, Hitoshi Abe

Chemistry Letters ( The Chemical Society of Japan ) 2023年03月 [査読有り]

DOI

Recent progress on unusual halogen-bridged Pd(III) chain compounds realized by weak ligand field and triple hydrogen bond approaches

Mohammad Rasel Mian, Masanori Wakizaka, Takefumi Yoshida, Hiroaki Iguchi, Shinya Takaishi, Masahiro Yamashita (担当区分：責任著者 )

Coordination Chemistry Reviews 475 ( 15 ) 214878 2023年01月 [査読有り]

The development of new halogen-bridged Pd chain complexes with molecular precision offers a promising strategy to stabilize Pd(III) ions, which are being considered as future optical, magnetic, dielectric, and conducting materials. More recently, uncommon and rare electronic states of Pd(III) ions in halogen-bridged chain complexes have been reported. In these systems, four different designed strategies have been adopted to stabilize Pd(III) oxidation states to date. This review focuses on the new strategies for the realization of Pd(III) halogen-bridged metal complexes (MX-Chains) using (1) weak ligand field and (2) triple hydrogen bond approaches. The resulting MX-Chains show clear evidence of the Pd(III) averaged-valence (AV) state rather than the conventional Pd(II)/Pd(IV) mixed-valence (MV) state. The relationships between the molecular structures, electronic states, and properties of these MX-Chains strongly depend on the in-plane ligands, counteranions and their surrounding environments. Furthermore, Pd(III) states have been found in the MX-Chains even above room temperature. Understanding and controlling the Pd(III) states in halogen-bridged chain complexes is a critical issue for development of next-generation devices, such as molecular electrical nano-wires. Overall, this review establishes halogen-bridged Pd(III) complexes as highly effective solid-state materials and provides detailed insight into their structure–property relationships, laying the groundwork for future developments in this new class of advanced materials.

DOI

Pd‐PdO Nanodomains on Amorphous Ru Metallene Oxide for High‐Performance Multifunctional Electrocatalysis

Viet‐Hung Do, P Prabhu, Vishal Jose, Takefumi Yoshida, Yingtang Zhou, Hiroko Miwa, Takuma Kaneko, Tomoya Uruga, Yasuhiro Iwasawa, Jong‐Min Lee

Advanced Materials ( Wiley ) 2208860 - 2208860 2023年01月 [査読有り]

Developing highly efficient multifunctional electrocatalysts is crucial for future sustainable energy pursuits, but remains a great challenge. Herein, a facile synthetic strategy is used to confine atomically thin Pd-PdO nanodomains to amorphous Ru metallene oxide (RuO2). The as-synthesized electrocatalyst (Pd(2)RuOx-0.5 h) exhibits excellent catalytic activity toward the pH-universal hydrogen evolution reaction (eta(10) = 14 mV in 1 m KOH, eta(10) = 12 mV in 0.5 m H2SO4, and eta(10) = 22 mV in 1 m PBS), alkaline oxygen evolution reaction (eta(10) = 225 mV), and overall water splitting (E-10 = 1.49 V) with high mass activity and operational stability. Further reduction endows the material (Pd(2)RuOx-2 h) with a promising alkaline oxygen reduction activity, evidenced by high halfway potential, four-electron selectivity, and excellent poison tolerance. The enhanced catalytic activity is attributed to the rational integration of favorable nanostructures, including 1) the atomically thin nanosheet morphology, 2) the coexisting amorphous and defective crystalline phases, and 3) the multi-component heterostructural features. These structural factors effectively regulate the material's electronic configuration and the adsorption of intermediates at the active sites for favorable reaction energetics.

DOI

Chemical pressure-induced PtIII–I Mott–Hubbard nanowire, [Pt(en)2I](Asp-Cn)2·H2O (13 ≤ n), detected via polarized infrared spectroscopy

Shohei Kumagai, Takefumi Yoshida, Hiroaki Iguchi, Masanori Wakizaka, Nobuto Funakoshi, Masahiro Yamashita, Shinya Takaishi

Chemical Communications ( Royal Society of Chemistry (RSC) ) 59 ( 95 ) 14118 - 14121 2023年 [査読有り]

DOI

Heterospin frustration in a metal-fullerene-bonded semiconductive antiferromagnet

Yongbing Shen, Mengxing Cui, Shinya Takaishi, Hideyuki Kawasoko, Kunihisa Sugimoto, Takao Tsumuraya, Akihiro Otsuka, Eunsang Kwon, Takefumi Yoshida, Norihisa Hoshino, Kazuhiko Kawachi, Yasuhiko Kasama, Tomoyuki Akutagawa, Tomoteru Fukumura, Masahiro Yamashita

Nature Communications ( Springer Science and Business Media LLC ) 13 ( 1 ) 2022年12月 [査読有り]

<title>Abstract</title>Lithium-ion-encapsulated fullerenes (Li+@C60) are 3D superatoms with rich oxidative states. Here we show a conductive and magnetically frustrated metal–fullerene-bonded framework {[Cu4(Li@C60)(L)(py)4](NTf2)(hexane)}<italic>n</italic> (<bold>1</bold>) (<italic>L</italic> = 1,2,4,5-tetrakis(methanesulfonamido)benzene, py = pyridine, NTf2− = bis(trifluoromethane)sulfonamide anion) prepared from redox-active dinuclear metal complex Cu2(L)(py)4 and lithium-ion-encapsulated fullerene salt (Li+@C60)(NTf2−). Electron donor Cu2(L)(py)2 bonds to acceptor Li+@C60 via eight Cu‒C bonds. Cu–C bond formation stems from spontaneous charge transfer (CT) between Cu2(L)(py)4 and (Li+@C60)(NTf2−) by removing the two-terminal py molecules, yielding triplet ground state [Cu2(L)(py)2]+(Li+@C60•−), evidenced by absorption and electron paramagnetic resonance (EPR) spectra, magnetic properties and quantum chemical calculations. Moreover, Li+@C60•− radicals (<italic>S</italic> = ½) and Cu2+ ions (<italic>S</italic> = ½) interact antiferromagnetically in triangular spin lattices in the absence of long-range magnetic ordering to 1.8 K. The low-temperature heat capacity indicated that compound <bold>1</bold> is a potential candidate for an <italic>S</italic> = ½ quantum spin liquid (QSL).

DOI

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