Výsledky vyhledávání - "Shiro Hikichi"

Akademický článek

Oxidation Catalysis of Au Nano-Particles Immobilized on Titanium(IV)- and Alkylthiol-Functionalized SBA-15 Type Mesoporous Silicate Supports

Autor: Tomoki Haketa, Toshiaki Nozawa, Jun Nakazawa, Masaya Okamura, Shiro Hikichi

Publikováno v: Catalysts, Vol 13, Iss 1, p 35 (2022)

Novel Au nano-particle catalysts immobilized on both titanium(IV)- and alkylthiol-functionalized SBA-15 type ordered mesoporous silicate supports were developed. The bi-functionalized SBA-15 type support could be synthesized by a one-pot method. To t

Externí odkaz: https://doaj.org/article/9b08938247ae48d7af00cb143fcffe3f

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Akademický článek

The Conversion of Superoxide to Hydroperoxide on Cobalt(III) Depends on the Structural and Electronic Properties of Azole-Based Chelating Ligands

Autor: Toshiki Nishiura, Takehiro Ohta, Takashi Ogura, Jun Nakazawa, Masaya Okamura, Shiro Hikichi

Publikováno v: Molecules, Vol 27, Iss 19, p 6416 (2022)

Conversion from superoxide (O2−) to hydroperoxide (OOH−) on the metal center of oxygenases and oxidases is recognized to be a key step to generating an active species for substrate oxidation. In this study, reactivity of cobalt(III)-superoxido co

Externí odkaz: https://doaj.org/article/e8fb4d31cabf4e84b66f6db9133a0cd8

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Akademický článek

Immobilization of a Boron Center-Functionalized Scorpionate Ligand on Mesoporous Silica Supports for Heterogeneous Tp-Based Catalysts

Autor: Ayaka Nakamizu, Takeshi Kasai, Jun Nakazawa, Shiro Hikichi

Publikováno v: ACS Omega, Vol 2, Iss 3, Pp 1025-1030 (2017)

Externí odkaz: https://doaj.org/article/e9f2a8a6892a4500807678f4c71ffb47

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Akademický článek

Cobalt(II) Complexes with N,N,N-Scorpionates and Bidentate Ligands: Comparison of Hydrotris(3,5-dimethylpyrazol-1-yl)borate Tp* vs. Phenyltris(4,4-dimethyloxazolin-2-yl)borate ToM to Control the Structural Properties and Reactivities of Cobalt Centers

Autor: Toshiki Nishiura, Takahiro Uramoto, Yuichiro Takiyama, Jun Nakazawa, Shiro Hikichi

Publikováno v: Molecules, Vol 23, Iss 6, p 1466 (2018)

Scorpionate ligands Tp* (hydrotris(3,5-dimethylpyrazol-1-yl)borate) and ToM (tris(4,4-dimethyloxazolin-2-yl)phenylborate) complexes of cobalt(II) with bidentate ligands were synthesized. Both Tp* and ToM coordinate to cobalt(II) in a tridentate fashi

Externí odkaz: https://doaj.org/article/d504edd76eec4f6598dc731d395a97fe

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Akademický článek

Switching Product Selectivity in Immobilized Tungstate Catalysts by Control of Hydrophobicity of Mesoporous Silicate Supports

Autor: Ko Kuwamoto, Dr. Masaya Okamura, Prof. Dr. Shiro Hikichi

Publikováno v: ChemistryEurope, Vol 2, Iss 2, Pp n/a-n/a (2024)

Abstract Novel mesoporous silicates modified with imidazolium cation were applied as the support for peroxotungstate. Stepwise introduction of multiple functional groups to SBA‐15 was achieved by the combination of the direct and post‐synthesis p

Externí odkaz: https://doaj.org/article/57a95bb9a5fb461e979cf42cb4faab48

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Selective alkane hydroxylation and alkene epoxidation using H2O2 and Fe(ii) catalysts electrostatically attached to a fluorinated surface

Autor: Hiroto Fujisaki, Masaya Okamura, Shiro Hikichi, Takahiko Kojima

Publikováno v: Chemical Communications. 59:3265-3268

Fe(ii) complexes with pentadentate ligands, including N-heterocyclic carbene moieties, were prepared and electrostatically attached onto the perfluorinated surface of a mesoporous aluminosilicate.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::202e0403a59de883200abde310d3c5e2
https://doi.org/10.1039/d2cc06998a

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Heteroleptic and Homoleptic Iron(III) Complexes with a Tris(N‐Heterocyclic Carbene) Borate Ligand: Synthesis, Characterization, and Catalytic Application

Autor: Yuna Sato, Masaya Okamura, Shiro Hikichi

Publikováno v: European Journal of Inorganic Chemistry. 26

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::48eaa0af984a5810d97f78aec8c971bc
https://doi.org/10.1002/ejic.202200728

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Alkane Oxidation with H2O2 Catalyzed by OsO4-carboxylate Adduct and Its Application to Heterogeneous Catalyst

Autor: Tomohiro Fujimoto, Yuta Ueda, Hideki Sugimoto, Jun Nakazawa, Shiro Hikichi, Shinobu Itoh

Publikováno v: Chemistry Letters. 51:231-234

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6bd73a5a87cc4ccad6832963170b541d
https://doi.org/10.1246/cl.210751

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Development of a novel scorpionate ligand with 6-methylpyridine and comparison of the structural and electronic properties of nickel(ii) complexes with related tris(azolyl)borates

Autor: Yusuke Fujiwara, Tomoaki Takayama, Jun Nakazawa, Masaya Okamura, Shiro Hikichi

Publikováno v: Dalton Transactions. 51:10338-10342

A facially-capping tris(6-methylpyridyl)phenylborate is highly electron-donating and its nickel complex is potent mCPBA activator.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fa23c06165532558f6b525e1dbfeaa4d
https://doi.org/10.1039/d2dt01548j

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Efficient alkane hydroxylation catalysis of nickel(ii) complexes with oxazoline donor containing tripodal tetradentate ligands

Autor: Sena Horii, Masaya Okamura, Jun Nakazawa, Ikumi Terao, Shiro Hikichi

Publikováno v: Dalton transactions (Cambridge, England : 2003). 49(18)

Tris(oxazolynylmethyl)amine TOAR (where R denotes the substituent groups on the fourth position of the oxazoline rings) complexes of nickel(II) have been synthesized as catalyst precursors for alkane oxidation with meta-chloroperoxybenzoic acid (m-CP

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::589872b8c19fdc59a6c9b5b831ed90cb
https://pubmed.ncbi.nlm.nih.gov/32323686

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