Angew Chem Int Ed Engl. 2012 Aug 13;51(33):8369-72.
Higuchi M, Nakamura K, Horike S, Hijikata Y, Yanai N, Fukushima T, Kim J, Kato K, Takata M, Watanabe D, Oshima S, Kitagawa S.
Institute for Integrated Cell-Material Sciences, Kyoto University, 69 Konoe-cho, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan.
A novel porous coordination polymer with a charged organic surface (COS) comprising a zwitterionic organic linker, viologen, has been synthesized. The COS shows strong Lewis acidity accompanied with flexibility, and the isosteric heat of H2 adsorption is 9.5 kJ mol−1, which is comparable to that of open metal sites (OMSs).
The synchrotron radiation experiments were performed at the BL44B2 in the SPring-8 with the approval of the RIKEN (Proposal No. 20090066). This work was supported by the JX Nippon Oil & Energy Corporation, ERATO “Kitagawa Integrated Pores Project” of the Japan Science and Technology Agency (JST), and the New Energy and Industrial Technology Development Organization (NEDO).