title: Regulation of NO Uptake in Flexible Ru Dimer Chain Compounds with Highly Electron Donating Dopants.
abstract: On-demand design of porous frameworks for selective capture of specific gas molecules, including toxic gas molecules such as nitric oxide (NO), is a very important theme in the research field of molecular porous materials. Herein, we report the achievement of highly selective NO adsorption through chemical doping in a framework (i.e., solid solution approach): the highly electron donating unit [Ru2(o-OMePhCO2)4] (o-OMePhCO2-= o-anisate) was transplanted into the structurally flexible chain framework [Ru2(4-Cl-2-OMePhCO2)4(phz)] (0; 4-Cl-2-OMePhCO2-= 4-chloro-o-anisate and phz = phenazine) to obtain a series of doped compounds, [{Ru2(4-Cl-2-OMePhCO2)4}1-x{Ru2(o-OMePhCO2)4}x(phz)] (x = 0.34, 0.44, 0.52, 0.70, 0.81, 0.87), with [Ru2(o-OMePhCO2)4(phz)] (1) as x = 1. The original compound 1 was made purely from a "highly electron donating unit" but had no adsorption capability for gases because of its nonporosity. Meanwhile, the partial transplant of the electronically advantageous [Ru2(o-OMePhCO2)4] unit with x = 0.34-0.52 in 0 successfully enhanced the selective adsorption capability of NO in an identical structurally flexible framework; an uptake at 95 kPa that was 1.7-3 mol/[Ru2] unit higher than that of the original 0 compound was achieved (121 K). The solid solution approach is an efficient means of designing purposeful porous frameworks.
authors.affiliation: Institute for Materials Research (IMR), Tohoku University , 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan.|Department of Chemistry, Graduate School of Science, Tohoku University , 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan.
authors.forename: Jun
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Institute for Materials Research (IMR), Tohoku University , 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan.|Department of Chemistry, Graduate School of Science, Tohoku University , 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan.
authors.forename: Wataru
authors.initials: W
authors.lastname: Kosaka
authors.affiliation: Institute for Materials Research (IMR), Tohoku University , 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan.|Department of Chemistry, Graduate School of Science, Tohoku University , 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan.
authors.forename: Hiroki
authors.initials: H
authors.lastname: Fukunaga
authors.affiliation: Institute for Integrated Cell-Materials Science (iCeMS), Kyoto University , Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.|Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University , Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.|RIKEN SPring-8 Center , Sayo-gun, Hyogo 679-5148, Japan.
authors.forename: Susumu
authors.initials: S
authors.lastname: Kitagawa
authors.affiliation: RIKEN SPring-8 Center , Sayo-gun, Hyogo 679-5148, Japan.|Japan Synchrotron Radiation Research Institute/SPring-8 , Sayo-gun, Hyogo 679-5198, Japan.|Institute of Multidisciplinary Research for Advanced Materials (IMRAM) , 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan.
authors.forename: Masaki
authors.initials: M
authors.lastname: Takata
authors.affiliation: Institute for Materials Research (IMR), Tohoku University , 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan.|Department of Chemistry, Graduate School of Science, Tohoku University , 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan.
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Miyasaka