Hokkaido University · Materials Science
Professor Shin-ichiro Noro's research lab specializes in the design and synthesis of metal–organic frameworks (MOFs) and porous coordination polymers with tailored porosity and functionality. The lab focuses on creating robust, microporous 3D networks using strategic combinations of metal ions, organic ligands, and anionic frameworks to achieve exceptional gas adsorption capacities—particularly for methane—while exploring the role of fluorine and electronegative ligands in enabling structural flexibility and selective guest interactions. Their work also emphasizes structural transformation, guest coordination, and the development of stimuli-responsive materials for advanced applications in gas storage and separation.
Figures are computed from collected data and may differ slightly.
An astonishing amount of methane is reversibly adsorbed in pores of [{CuSiF6(4,4′-bipyridine)2}n], which exists as a stable 3D microporous network (see picture). The approximate channel sizes of this material is 8×8 Å2 along its c axis and 6×2 Å2 along the a and b axes. At 36 atm, the density of methane adsorbed in micropore volume is 0.21 g mL−1, which is superior to that of any reported zeolites.
A combination of framework-builder (Cu(II) ion and 4,4'-bipyridine (4,4'-bpy) ligand) and framework-regulator (AF(6) type anions; A = Si, Ge, and P) provides a series of novel porous coordination polymers. The highly porous coordination polymers ([Cu(AF(6))(4,4'-bpy)(2)].8H(2)O)(n)(A = Si (1a.8H(2)O), Ge (2a.8H(2)O)) afford robust 3-dimensional (3-D), microporous networks (3-D Regular Grid) by using AF(6)(2-) anions. The channel size of these complexes is ca. 8 x 8 A(2) along the c-axis and 6 x
Utilization of a metalloligand, ([Cu(2,4-pydca)2(H2O)].2Et3NH) (1) (2,4-pydca = pyridine-2,4-dicarboxylate), as a building unit provides a novel porous coordination polymer, ([ZnCu(2,4-pydca)2(H2O)3(DMF)].DMF)n (2), in which the Zn(II) ion at the node of the network acts as a linker and the Cu(II) ion in the channel wall is available for guest-coordination.
By utilizing the novel metalloligand l(Cu), [Cu(2,4-pydca)(2)](2)(-) (2,4-pydca(2)(-) = pyridine-2,4-dicarboxylate), which possesses two kinds of coordination groups, selective bond formation with the series of the first-period transition metal ions (Mn(ii), Fe(ii), Co(ii), Cu(ii), and Zn(ii)) has been accomplished. depending on the coordination mode of 4-carboxylate with Co(ii), Cu(ii), and Zn(ii) ions, L(Cu) forms a one-dimensional (1-d) assembly with a repeating motif of [-M-O(2)C-(py)N-Cu-N(
Eine erstaunlich große Menge an Methan wird reversibel von dem Koordinationspolymer [{CuSiF6(4,4′-bipyridin)2}n] adsorbiert, das ein stabiles mikroporöses 3D-Netzwerk aufweist (siehe Bild). Die Kanalgröße beträgt ca. 8×8 Å2 entlang der c-Achse und ca. 6×2 Å2 entlang der a- und b-Achse. Bei 36 atm beträgt die Dichte des in den Mikroporen adsorbierten Methans 0.21 g mL−1 – mehr als bei allen anderen untersuchten Zeolithen.
Fluorine, the element with the highest electronegativity and low electric polarizability, can produce a variety of characteristics, including specific adsorption sites for molecules as well as flexibility to the host materials. In this review, we will introduce fluorine-functionalized metal–organic frameworks/porous coordination polymers that show unique and unprecedented structures, structural transformations, and gas and vapor adsorption/separation properties derived from the fluorine characte
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 ligan
Functional inner space: A gigantic ring-shaped {Mo154} polyoxometalate cluster anion can be stabilized by encapsulation in dimethyldioctadecylammonium (DODA) cations. Its inner nanospace enables adsorption of gases and vapors, and it acts as a water-tolerant solid acid catalyst (see scheme). Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the aut
Introducing polar Cu−PF6 parts into a coordination framework will open new routes in the fabrication of high-performance and/or novel functional porous materials. We have designed and synthesized the one-dimensional CuII coordination polymer [Cu(PF6)2(bpetha)2]n (1), with weak and flexible Cu−PF6 parts. 1 shows the property of highly selective adsorption for CO2 and C2H2 gases, which interact with the F atoms of the polar Cu−PF6 parts. Crystallographic characterization of [Cu(PF6)2(4-mepy)4] (2)
High selectivity and low-energy regeneration for adsorption of CO(2) gas were achieved concurrently in a two-dimensional Cu(II) porous coordination polymer, [Cu(PF(6))(2)(4,4'-bpy)(2)](n) (4,4'-bpy = 4,4'-bipyridine), containing inorganic fluorinated PF(6)(-) anions that can act as moderate interaction sites for CO(2) molecules.
New iron(II) co-ordination polymers, {[Fe(azpy)(NCS)2(MeOH)2]·azpy}n 1 (azpy = 4,4′-azopyridine), {[Fe(4,4′-bpy)(NCS)2(H2O)2]·4,4′-bpy}n 2 (4,4′-bpy = 4,4′-bipyridine) and {[Fe(azpy)2(NCS)2]·3H2O}n 3 have been synthesized and characterized. The crystal structures of both compounds 1 and 2 contain two types of bridging ligands; one is of the co-ordination bond type, directly bridging iron centers to form a one-dimensional chain of [Fe(L)] (L = azpy or 4,4′-bpy), while the other links these chains
The semiconducting film based on bis(o-diiminobenzosemiquinonate) nickel(II) complex showed uniaxial orientation structure along the normal to the substrate and good p-type metal-organic thin-film transistor (MOTFT) character.
Coordination compounds with a 4,4'-azobis(pyridine) (azpy) ligand, {[M2(azpy)6(H2O)5] x 4PF6 x azpy x H2O}n (M = Ni(II) (1) or Co(II) (2)) (0-dimensional (0-D) dimer), {[Zn(azpy)3(H2O)2] x 2PF6 x 2azpy x 4H2O}n (3) (1-dimensional (1-D) fishbone-type chain), {[Ag(azpy)] x PF6}n (4) (1-D linear chain), {[Mn(NCS)2(azpy)2] x azpy}n (5) (2-dimensional (2-D) grid sheet), and {[Ni(NCS)2(azpy)2] x 3toluene}n (6) (2-D grid sheet), were synthesized and structurally characterized. Compounds 1 and 2 have a
A series of guest-binding Cu(II) coordination polymers, {[Cu(bpetha)2(acetone)2].2PF6}n (bpetha = 1,2-bis(4-pyridyl)ethane) (1), {[Cu(bpetha)2(DMF)2].2PF6}n (2), {[Cu(bpetha)(2)(MeCN)(2)].2PF6.2MeCN}n (3), {[Cu(bpetha)2(H2O)2].2PF6.3THF.2H2O}n (4), {[Cu(bpetha)2(H2O)2].2PF6.3dioxane}n (5), and {[Cu(bpetha)2(H2O)2].2PF6.2-PrOH.2H2O}n (6), have been synthesized and crystallographically characterized. Their framework stabilities and guest-exchange properties have also been investigated. All compoun
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