Soichi Kikkawa

Symmetry Breaking Drives Twisted Prismatic Evolution in Atomically Precise Copper Nanoclusters

Glory James, D.P. Mondal, Nisha Job, Sisira S Shaiju et autres

The stability of the copper nanocluster has always been a concern owing to its low half-cell reduction potential. It is well documented that anion templates are known to tune the structure and impart stability to the nanocluster. Here, using a simple reduction …

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CCDC 2163957: Experimental Crystal Structure Determination

Ebied Sherif E.SugiartoMinato TakuoKikkawa SoichiYamazoe SeijiSadakane Masahiro, Sugiarto, Takuo Minato, Soichi Kikkawa et autres

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, …

CCDC 2422079: Experimental Crystal Structure Determination

Kohei Sunami, Tatsuya Higaki, Kanata Tanaka, Ryotaro Yamanashi et autres

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, …

CCDC 2422080: Experimental Crystal Structure Determination

Kohei Sunami, Tatsuya Higaki, Kanata Tanaka, Ryotaro Yamanashi et autres

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, …

Anderson-Type Polyoxotungstate with Central Ruthenium, [RuIVW6O24]8–: Synthesis, Structure, Redox Studies, and Electrochemical Water Oxidation Activity

Sherif E Ebied, Sugiarto Sugiarto, Takuo Minato, Soichi Kikkawa et autres

The reaction of Na2WO4·2H2O with [(benzene)RuCl2]2 at temperatures above 70 °C produced an Anderson-type ruthenotungstate, Na8[RuIVW6O24], together with (benzene)Ru-tungstates, [{(benzene)Ru}4W2O10] and Na6[{(benzene)Ru}2H2W8O30]. The first ruthenium-containing Anderson-type polyoxometalate was isolated by recrystallization and characterized using single-crystal X-ray diffraction (XRD), elemental analysis, powder XRD, …

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A tetranuclear nickel hydride cluster capable of reversible activation of aromatic and aliphatic C–H bonds

Kohei Sunami, Tatsuya Higaki, Kanata Tanaka, Ryotaro Yamanashi et autres

Metal cluster complexes supported by multiple hydrides are useful for activating inert bonds and molecules, while nickel-based variants capable of activating external substrates remain scarce. Here, we report a tetranuclear Ni-hydride-phosphine cluster, [Ni4H4(PtBu3)4] (1), which we synthesize by reacting [Li(THF)x][Ni{N(SiMe3)2}3] (x ≈ …

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Countercation Manipulation Enables Selective Electrochemical CO 2 ‐to‐Formate Conversion Over Bi‐Polyoxometalate‐Derived Catalysts

Kimitake Kawakami, Kentaro Yonesato, Shimon Akino, Soichi Kikkawa et autres

ABSTRACT Electrochemical conversion of CO 2 into formate (HCOO − ) represents a promising strategy for mitigating global warming while producing an industrially important chemical. Polyoxometalates (POMs), anionic molecular metal‐oxo clusters, offer unique opportunities as catalysts and catalyst precursors for the electrochemical …

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Nonequilibrium Electrochemical Synthesis of Cu–In Intermetallic Compound Nanoparticles for Selective CO 2 Reduction

Soichi Kikkawa, Tatsuya Koubayashi, Toshiaki Oka, Ray Miyazaki et autres

High Resolution Image Download MS PowerPoint Slide An In-rich Cu–In intermetallic compound (IMC), CuIn 2, was accessed through an electrochemical nonequilibrium pathway and obtained as bulk Cu 2 In core/CuIn 2 shell nanoparticles. CuIn 2 is thermodynamically metastable in the Cu–In binary …

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Ligand Engineering of Dithiolate-Protected Au 24 Pt Nanoclusters for Improved Thermocatalytic Activity

Riki Nakatani, Tokuhisa Kawawaki, Sara Yoshikawa, Chaoqi Chen et autres

Thiolate-protected gold (Au) nanoclusters (NCs) are a well-established class of model NCs that have been extensively studied as catalysts for various reactions. However, many Au NCs feature surfaces completely passivated by ligands, leaving no exposed metal sites to serve as active centers. …

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Stabilization of Ligand‐Free Small Gold Nanocluster Within a Metal–Organic Framework for Enhanced Hydrogen Evolution and Horseradish Peroxidase‐Mimicking Catalysis in Aqueous Media

Glory James, Ravari Kandy Aparna, Dhananjay, Arun Karmakar et autres

ABSTRACT Atom‐precise metal nanoclusters (NCs) have garnered considerable attention due to their photoluminescence and catalytic properties arising from the quantum confinement effect and metal‐ligand interaction. However, the tendency of NCs to aggregate under reaction conditions hinders their catalytic activity. Surface‐protecting ligands can …

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Deciphering Twisted Prismatic Structural Evolution in Atomically Precise Copper Nanoclusters

Glory James, D.P. Mondal, Nisha Job, Sisira S Shaiju et autres

The stability of the copper nanocluster has always been a concern owing to its low half-cell reduction potential. It is well documented that anion templates are known to tune the structure and impart stability to the nanocluster. Here, using a simple reduction …

in, jp, it (code pays fourni par la source)

Ligand Engineering of Dithiolate-Protected Au24Pt Nanoclusters for Improved Thermocatalytic Activity

Riki Nakatani, Tokuhisa Kawawaki, Sara Yoshikawa, Chao Chen et autres

Thiolate-protected gold (Au) nanoclusters (NCs) are a well-established class of model NCs that have been extensively studied as catalysts for various reactions. However, many Au NCs feature surfaces completely passivated by ligands, leaving no exposed metal sites to serve as active centers. …

jp (code pays fourni par la source)