Porous coordination polymers with ubiquitous and biocompatible metals and a neutral bridging ligand

Shin-ichiro Noro (), Junya Mizutani, Yuh Hijikata, Ryotaro Matsuda, Hiroshi Sato, Susumu Kitagawa, Kunihisa Sugimoto, Yasutaka Inubushi, Kazuya Kubo and Takayoshi Nakamura ()
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Shin-ichiro Noro: Research Institute for Electronic Science, Hokkaido University
Junya Mizutani: Graduate School of Environmental Earth Science, Hokkaido University
Yuh Hijikata: Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Chikusa-ku
Ryotaro Matsuda: PRESTO, Japan Science and Technology Agency (JST)
Hiroshi Sato: Institute for Integrated Cell-Material Science (WPI-iCeMS), Kyoto University
Susumu Kitagawa: Institute for Integrated Cell-Material Science (WPI-iCeMS), Kyoto University
Kunihisa Sugimoto: Japan Synchrotron Radiation Research Institute
Yasutaka Inubushi: Synthesis Research Laboratory, Kurashiki Research Center, Kuraray Co. Ltd.
Kazuya Kubo: Research Institute for Electronic Science, Hokkaido University
Takayoshi Nakamura: Research Institute for Electronic Science, Hokkaido University

Nature Communications, 2015, vol. 6, issue 1, 1-9

Abstract: Abstract The design of inexpensive and less toxic porous coordination polymers (PCPs) that show selective adsorption or high adsorption capacity is a critical issue in research on applicable porous materials. Although use of Group II magnesium(II) and calcium(II) ions as building blocks could provide cheaper materials and lead to enhanced biocompatibility, examples of magnesium(II) and calcium(II) PCPs are extremely limited compared with commonly used transition metal ones, because neutral bridging ligands have not been available for magnesium(II) and calcium(II) ions. Here we report a rationally designed neutral and charge-polarized bridging ligand as a new partner for magnesium(II) and calcium(II) ions. The three-dimensional magnesium(II) and calcium(II) PCPs synthesized using such a neutral ligand are stable and show selective adsorption and separation of carbon dioxide over methane at ambient temperature. This synthetic approach allows the structural diversification of Group II magnesium(II) and calcium(II) PCPs.

Date: 2015
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DOI: 10.1038/ncomms6851

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