Yamada Mihoko, Yoshinari Nobuto, Kuwamura Naoto, Saito Toru, Okada Satoshi, Maddala Sai Prakash, Harano Koji, Nakamura Eiichi, Yamagami Kohei, Yamanaka Keisuke, Sekiyama Akira, Suenobu Tomoyoshi, Yamada Yusuke, Konno Takumi
Department of Chemistry , Graduate School of Science , Osaka University , Toyonaka , Osaka 560-0043 , Japan . Email:
Department of Biomedical Information Sciences , Graduate School of Information Sciences , Hiroshima City University , Asa-Minami-ku , Hiroshima 731-3194 , Japan.
Chem Sci. 2017 Apr 1;8(4):2671-2676. doi: 10.1039/c6sc04993a. Epub 2017 Jan 16.
Unique heterogeneous catalase-like activity was observed for metallosupramolecular ionic crystals [AuCo(dppe)(d-pen)]X ([]X ; dppe = 1,2-bis(diphenylphosphino)ethane; d-pen = d-penicillaminate; X = (Cl), (ClO), (NO) or SO) consisting of AuCo complex cations, [], and inorganic anions, X or X. Treatment of the ionic crystals with an aqueous HO solution led to considerable O evolution with a high turnover frequency of 1.4 × 10 h for the heterogeneous cobalt complexes, which was dependent on their size and shape as well as the arrangement of cationic and anionic species. These dependencies were rationalized by the presence of cobalt(ii) centers on the crystal surface and their efficient exposure on the (111) plane rather than the (100) plane based on morphological and theoretical studies.
对于由金钴络合阳离子[AuCo(dppe)(d - pen)]⁺（dppe = 1,2 - 双（二苯基膦基）乙烷；d - pen = 青霉胺；X⁻ = Cl⁻、ClO₄⁻、NO₃⁻或SO₄²⁻）和无机阴离子X⁻或X组成的金属超分子离子晶体[AuCo(dppe)(d - pen)]X，观察到了独特的非均相类过氧化氢酶活性。用HO₂水溶液处理离子晶体时，非均相钴络合物会产生大量氧气，其周转频率高达1.4×10⁵ h⁻¹，这取决于它们的尺寸和形状以及阳离子和阴离子物种的排列。基于形态学和理论研究，晶体表面钴（II）中心的存在以及它们在（111）面而非（100）面上的有效暴露，解释了这些依赖性。
Zotero 插件
