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. 2016 Jul 29;6:30295. doi: 10.1038/srep30295

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Copyright © 2016, The Author(s)

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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(a) Schematic illustration of the crystal structure of the bimetallic ZIFs (Co_x·Zn_1−x(MeIm)₂). (b) Photograph of ZIF-8, ZIF-67, and the bimetallic ZIF (Co_x·Zn_1−x(MeIm)₂) crystals. The initial molar ratios of Co²⁺/Zn²⁺ for the synthesis of each bimetallic ZIF is shown on top of the bottles in the form of an irreducible fraction. (c) TEM image, (d) elemental mapping, and (e) SEM image of the Co_0.1·Zn_0.9(MeIm)₂.