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Issue 4, 2017
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Heterogeneous catalase-like activity of gold(I)–cobalt(III) metallosupramolecular ionic crystals

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Abstract

Unique heterogeneous catalase-like activity was observed for metallosupramolecular ionic crystals [AuI4CoIII2(dppe)2(D-pen)4]Xn ([1]Xn; dppe = 1,2-bis(diphenylphosphino)ethane; D-pen = D-penicillaminate; Xn = (Cl)2, (ClO4)2, (NO3)2 or SO42−) consisting of AuI4CoIII2 complex cations, [1]2+, and inorganic anions, X or X2−. Treatment of the ionic crystals with an aqueous H2O2 solution led to considerable O2 evolution with a high turnover frequency of 1.4 × 105 h−1 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.

Graphical abstract: Heterogeneous catalase-like activity of gold(i)–cobalt(iii) metallosupramolecular ionic crystals

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Publication details

The article was received on 11 Nov 2016, accepted on 15 Jan 2017 and first published on 16 Jan 2017


Article type: Edge Article
DOI: 10.1039/C6SC04993A
Citation: Chem. Sci., 2017,8, 2671-2676
  • Open access: Creative Commons BY license
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    Heterogeneous catalase-like activity of gold(I)–cobalt(III) metallosupramolecular ionic crystals

    M. Yamada, N. Yoshinari, N. Kuwamura, T. Saito, S. Okada, S. P. Maddala, K. Harano, E. Nakamura, K. Yamagami, K. Yamanaka, A. Sekiyama, T. Suenobu, Y. Yamada and T. Konno, Chem. Sci., 2017, 8, 2671
    DOI: 10.1039/C6SC04993A

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