Shigehisa Akine

Publications168
h-index35
Citations3,791
Highly Influential Citations6
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Separation of Linear and Branched Alkanes Using Host-Guest Complexation of Cyclic and Branched Alkane Vapors by Crystal State Pillar[6]arene.
TLDR
Activated crystals of pillar[6]arene produced by removing the solvent upon heating were able to take up branched and cyclic alkane vapors as a consequence of their gate-opening behavior for improving the research octane number of an alkane mixture of isooctane and n-heptane.
Helical metallohost-guest complexes via site-selective transmetalation of homotrinuclear complexes.
TLDR
The site-specific metal exchange of trinuclear complex [LZn3]2+ described here will be utilized for highly selective ion recognition, site-selective synthesis of (3d)2(4f) trimetallic complexes, and construction of "tunable" metallohelicenes.
Synthesis, Ion Recognition Ability, and Metal-Assisted Aggregation Behavior of Dinuclear Metallohosts Having a Bis(Saloph) Macrocyclic Ligand.
TLDR
Density functional theory calculations revealed that smaller metal ions do not occupy the center of each macrocycle in the sandwich structures 22M, while larger Cs(+) simultaneously interacts with all the 12 oxygen donor atoms, which explains the preference for 2·Na over 22Na.
Modulation of multimetal complexation behavior of tetraoxime ligand by covalent transformation of olefinic functionalities.
TLDR
The chemical transformation of the olefinic moiety significantly affects the multimetal complexation behavior of the tetraoxime ligands and significantly deforms the structure in such a way that one of the salicylaldoxime moieties does not participate in the coordination.
Multiple folding structures mediated by metal coordination of acyclic multidentate ligand.
Four kinds of folded structures are formed upon the metal complexation of a bis(N(2)O(2)) ligand in which two oxime-type N(2)O(2) chelate ligands are connected by a flexible diethyleneoxy linker. The…
Novel thiosalamo ligand as a remarkably stable N2S2 salen-type chelate and synthesis of a nickel(II) complex.
Novel N2S2 tetradentate chelate ligand H2tsalamo, which contains both thiol groups and C=N moieties, was synthesized as a remarkably stable compound. Complexation between H2tsalamo and nickel(II)…
Cyclic and acyclic oligo(N2O2) ligands for cooperative multi-metal complexation.
This review describes the design and synthesis of hosts based on salen or related N(2)O(2) ligands, which are useful for the development of cooperative metal complexation systems. A key to the design…
Wheel-shaped Er(III) Zn(II)3 single-molecule magnet: a macrocyclic approach to designing magnetic anisotropy.
TLDR
It is demonstrated previously that an axial LF, whereby donor atoms with higher negative charges are located along the principal axis, induces a strong Ising-type anisotropy of Tb and Dy ions, which has a wide scope in the synthetic design of anisotropic magnets.
Alkane-Shape-Selective Vapochromic Behavior Based on Crystal-State Host-Guest Complexation of Pillar[5]arene Containing One Benzoquinone Unit.
TLDR
Colored crystals of pillar[5]arene containing one benzoquinone unit were found to exhibit alkane-shape-selective vapochromic behavior and were highly stable; after uptake of n-alkanes or methanol the color of the crystals did not change after storage in air for 3 weeks because the included guests were stabilized in the cavity by multiple CH/π interactions.
Synthesis and Characterization of Novel Ligands 1,2-Bis(salicylideneaminooxy)ethanes.
Novel ligands 1,2-bis(salicylideneaminooxy)ethanes were synthesized. They were much more stable against exchange reactions of aldehyde units than the corresponding salen derivatives. They form stable…
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