Kosuke Suzuki 교수

Living in a box: The dynamic self-assembly of Pd4L8 and Pd3L6 (L=1,2-bis[2-(pyridin-4-yl)ethynyl]benzene) box-shaped structures is controlled by the solvent (see picture; Pd yellow, C, N blue, H gray). The two structures can be interconverted reversibly and repeatedly by simply switching the medium between DMSO (Pd4L8) and MeCN/DMSO (Pd3L6). Owing to the reversibility of metal–ligand coordination bonds, molecular assemblies from metals and ligands are often in equilibrium when their thermodynami

A 3x3x3 nm cubic coordination compound quantitatively self-assembled from 6 palladium ions and 12 bent ligands with a 90 degrees bend angle.

Reversible switching of single-molecule magnet (SMM) behaviors was demonstrated by structural transformation of dinuclear dysprosium cores in polyoxometalates [{Dy(H2O)2(CH3COCH3)}2(γ-SiW10O36)2]10− (1) and [Dy2(μ2-OH)2(γ-SiW10O36)2]12− (2). Whereas 1 hardly showed a SMM behavior, 2 with bis(μ2-OH) bridging ligands between two dysprosium cations showed a SMM behavior with a thermal energy barrier ΔE/kB of 65.7 K. This is mainly because of large magnetic anisotropy in 2 obtained by the design of

The development of visible-light-induced photocatalysts for chemoselective functional group transformations has received considerable attention. Polyoxometalates (POMs) are potential materials for efficient photocatalysts because their properties can be precisely tuned by changing their constituent elements and structures and by the introduction of additional metal cations. Furthermore, they are thermally and oxidatively more stable than the frequently utilized organometallic complexes. The visi

At the interior of a ca. 5 nm-sized self-assembled coordination sphere, 24 amino acids (or peptides) are lined to generate chiralityconfined protein-mimic cavities, whose structures are well-characterized by spectroscopy and X-ray analysis.

Efficient polyoxometalate (POM)-based Lewis acid-base catalysts of the rare-earth-metal-containing POMs (TBA(6)RE-POM, RE = Y(3+), Nd(3+), Eu(3+), Gd(3+), Tb(3+), or Dy(3+)) were designed and synthesized by reactions of TBA(4)H(4)[γ-SiW(10)O(36)] (TBA = tetra-n-butylammonium) with RE(acac)(3) (acac = acetylacetonato). TBA(6)RE-POM consisted of two silicotungstate units pillared by two rare-earth-metal cations. Nucleophilic oxygen-enriched surfaces of negatively charged POMs and the incorporated

Herein, we report for the first time polyoxometalate (POM)-based single-molecule magnets with mononuclear transition metal cores. The mononuclear Fe(III)-, Co(II)-, and Mn(III)-containing POMs have successfully been synthesized from a trivacant lacunary Keggin-type silicotungstate precursor TBA4H6[A-α-SiW9O34]·2H2O (TBA = tetra-n-butylammonium), and the highly distorted octahedral geometries of the incorporated metal cations resulted in the magnetic anisotropies and the single-molecule magnet be

A 4.6 nm-sized coordination sphere confines 24 pendant coronene molecules at its core. The confined coronene molecules are fluid, forming a liquid "coronene nanodroplet" that could never exist in bulk. C(60) dissolves in this nano solvent with a high local concentration.

Polyoxometalates (POMs), anionic metal-oxygen nanoclusters that possess various composition-dependent properties, are widely used to modify the existing properties of metal nanoparticles and to endow them with new ones. Herein, we present an overview of recent advances in hybrid materials that consist of metal nanoparticles and POMs. Following a brief introduction on the inception of this area and its development, representative properties and applications of these materials in various fields su

Selective oxygenation of sulfides to sulfones and sulfoxides was demonstrated by photocatalysis of decavanadate using O₂ in methyl ethyl ketone.

A void in the issue: A one-step self-assembly of γ-Keggin sandwich-type silicotungstates with M2Zn2 (M=Co, Ni, Zn) tetranuclear cores and tetrabutylammonium cations gave porous ionic crystals. These porous crystals are hollow frameworks containing large voids (ca. 38×38×38 Å3, see picture, voids yellow), between which guest molecules can be exchanged through the connecting channels. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are p

We report the efficient visible-light-responsive photocatalysis of polyoxometalates (POMs) by engineering the lowest unoccupied molecular orbitals (LUMOs). By the introduction of vanadium atoms into the γ-Keggin-type phosphotungstate, a new V3d/W5d mixed LUMO appeared to afford a visible-light-responsive catalyst (I), which showed high photocatalytic activity for aerobic oxygenation of sulfides to sulfoxides.

Interior design: A 5 nm sized spherical complex, which confines 24 alkyl chains in its interior, provides a localized hydrophobic environment with a uniform size and structure (see picture; shell blue, Pd yellow, O red, C purple, H gray). The hydrophobic phase can solubilize dye molecules, and the hydrophobicity of the complex can be tuned by simply changing the length of the alkyl chains. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2

Variable Schachteln: Die dynamische Selbstorganisation von schachtelförmigen Pd4L8- und Pd3L6-Strukturen (L=1,2-Bis[2-(pyridin-4-yl)ethinyl]benzol) lässt sich über das Lösungsmittel steuern (siehe Bild; Pd gelb, C, N blau, H grau). Die beiden Strukturen können reversibel und wiederholt durch einfachen Wechsel des Mediums zwischen DMSO (Pd4L8) und MeCN/DMSO (Pd3L6) ineinander umgewandelt werden. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents