Ki-Min Park

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A blue phosphorescent iridium(III) complex (1) bearing fluorine-substituted bipyridine (dfpypy) has been synthesized and characterized to investigate the effect of the substitution and replacement of the phenyl ring in ppy (phenylpyridine) with pyridine on the solid state structure and its photoluminescence. The optical properties and electrochemical(More)
[reaction: see text] A N-azo-coupled macrocycle (1) with a NO(2)S(2) donor set was synthesized as a chromoionophore and shown to exhibit Hg(2+) selectivity; anion control of the color of the Hg(2+) complex was observed. As a first approach, the nature of the color generation process was probed by determining the crystal structures of the two different(More)
This paper reports a synthetic strategy to construct one- and two-dimensional (1D and 2D) polyrotaxanes, in which a number of rings are threaded onto a coordination polymer, by the combination of self-assembly and coordination chemistry. Our approach to construct polyrotaxanes with high structural regularity involves threading a cucurbituril (CB) "bead"(More)
This paper reports an efficient strategy to synthesize molecular necklaces, in which a number of small rings are threaded onto a large ring, utilizing the principles of self-assembly and coordination chemistry. Our strategy involves (1) threading a molecular "bead" with a short "string" to make a pseudorotaxane and then (2) linking the pseudorotaxanes with(More)
The new isoprenylated tetrahydroxyxanthone, 2,3,6,8-tetrahydroxy-1-(3-methylbut-2-enyl)-5-(2-methylbut-3-en-2-yl)-9H-xanthen-9-one (1), was isolated from the root bark of Cudrania tricuspidata together with macluraxanthone B (2) and cudraxanthone L (3), which were fully characterized by NMR spectroscopic and X-ray crystallographic analyses.
A novel fullerene-porphyrin-fullerene triad linked by the axial coordination of tin(IV) porphyrin is reported, exhibiting strong pi-pi interactions between the tin porphyrin and fullerene moieties owing to their close proximity.
In the title compound, C(11)H(8)Cl(2)N(2)O, the benzene and pyridazine rings are tilted by 8.6 (1)° relative to each other. In the crystal, pairs of inter-molecular N-H⋯O hydrogen bonds form centrosymmetric dimers. π-π contacts with centroid-centroid distances of 3.698 (2) and 3.751 (1) Å and halogen-halogen inter-actions [3.379 (1) Å] also stabilize the(More)
In the title polymeric complex, {[Ag(C11H11N3)]PF6} n , the Ag(I) ion is two-coordinated in a nearly linear coordination geometry [N-Ag-N = 175.98 (9)°] by two pyridine N atoms from two symmetry-related N-[(pyridine-2-yl)meth-yl]pyridine-3-amine ligands. Each Ag(I) ion is bridged by the ligands, forming a helical chain propagating along the b-axis(More)
The title cocrystal, C(10)H(8)N(2)·C(6)H(6)O(4), crystallizes with half-mol-ecules of 4,4'-bipyridine and trans,trans-hexa-2,4-dienedioic acid in the asymmetric unit, as each is located about a crystallographic inversion center. The bipyridine molecule is planar from symmetry. In the dicarboxylic acid molecule, the O-C-C-C torsion angle is -13.0 (2)°. In(More)