title: Coordination Networks of a Ditopic Macrocycle Exhibiting Anion-Controlled Dimensional Changes and Crystal-to-Crystal Anion Exchange.
abstract: A rationally designed NO2S2-donor macrocycle L was synthesized, and anion variation (PF6(-), CF3CO2(-), NO3(-), and CF3SO3(-)) of its silver(I) complexes was employed as a strategy for controlling their coordination modes and network dimensions. The assembly reactions of L with four silver(I) salts afforded the complexes [Ag2L2](PF6)2 (1), [Ag4L2(CF3CO2)4]n (2), [Ag4L2(NO3)4]n (3), and {[Ag3L2(CF3SO3)2]CF3SO3}n (4) that adopt cyclic dimer, 1D, 2D, and pseudo 3D network structures, respectively, with the structure adopted depending on the coordination ability and coordination modes of the anion used. Interestingly, quantitative anion exchange accompanying an irreversible structural conversion from 2, 3, or 4 to 1 was observed in the crystalline state by powder X-ray diffraction (PXRD) and IR spectroscopy. A stepwise mechanistic process from 2 (CF3CO2(-), 1D) to 3 (NO3(-), 2D) by anion exchange was also proposed.
authors.affiliation: †Department of Chemistry and Research Institute of Natural Science, Gyeongsang National University, Jinju 660-701, South Korea.
authors.forename: Eunji
authors.initials: E
authors.lastname: Lee
authors.affiliation: †Department of Chemistry and Research Institute of Natural Science, Gyeongsang National University, Jinju 660-701, South Korea.
authors.forename: Ki-Min
authors.initials: KM
authors.lastname: Park
authors.affiliation: ‡Education Center, Faculty of Engineering, Chiba Institute of Technology, 2-1-1 Shibazono, Narashino, Chiba 275-0023, Japan.
authors.forename: Mari
authors.initials: M
authors.lastname: Ikeda
authors.forename: Shunsuke
authors.initials: S
authors.lastname: Kuwahara
authors.forename: Yoichi
authors.initials: Y
authors.lastname: Habata
authors.affiliation: †Department of Chemistry and Research Institute of Natural Science, Gyeongsang National University, Jinju 660-701, South Korea.
authors.forename: Shim Sung
authors.initials: SS
authors.lastname: Lee