title: Control of molecular rotor rotational frequencies in porous coordination polymers using a solid-solution approach.
abstract: Rational design to control the dynamics of molecular rotors in crystalline solids is of interest because it offers advanced materials with precisely tuned functionality. Herein, we describe the control of the rotational frequency of rotors in flexible porous coordination polymers (PCPs) using a solid-solution approach. Solid-solutions of the flexible PCPs [{Zn(5-nitroisophthalate)x(5-methoxyisophthalate)1-x(deuterated 4,4'-bipyridyl)}(DMF·MeOH)]n allow continuous modulation of cell volume by changing the solid-solution ratio x. Variation of the isostructures provides continuous changes in the local environment around the molecular rotors (pyridyl rings of the 4,4'-bipyridyl group), leading to the control of the rotational frequency without the need to vary the temperature.
authors.affiliation: Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University , Yoshida, Sakyo-ku, Kyoto 606-8501, Japan.
authors.forename: Munehiro
authors.initials: M
authors.lastname: Inukai
authors.affiliation: Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University , Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Fukushima
authors.affiliation: Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University , Chikusa-ku, Nagoya 464-8602, Japan.
authors.forename: Yuh
authors.initials: Y
authors.lastname: Hijikata
authors.affiliation: Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University , Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
authors.forename: Naoki
authors.initials: N
authors.lastname: Ogiwara
authors.affiliation: Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University , Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Horike
authors.affiliation: Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University , Yoshida, Sakyo-ku, Kyoto 606-8501, Japan.|Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University , Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
authors.forename: Susumu
authors.initials: S
authors.lastname: Kitagawa
mesh_terms: D057809:HEK293 Cells; D006801:Humans; D010316:Particle Size; D011108:Polymers / Q000737:chemistry*; D016062:Porosity; D012399:Rotation; D012996:Solutions; D013499:Surface Properties; D013696:Temperature
chemical_list: D011108:Polymers; D012996:Solutions