Issue 4, 2017

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


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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Article type
Edge Article
11 Nov 2016
15 Jan 2017
First published
16 Jan 2017
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY license

Chem. Sci., 2017,8, 2671-2676

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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