Search Results - "Asakawa, Masumi"

Boroxine Nanotubes: Moisture-Sensitive Morphological Transformation and Guest Release by Ishikawa, Kazuyuki, Kameta, Naohiro, Masuda, Mitsutoshi, Asakawa, Masumi, Shimizu, Toshimi

“…Boroxines, (R‐BO)3, which can be easily synthesized via a dehydration reaction of boronic acids, R–B(OH)2, selectively self‐assemble in toluene into…”
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Rotational Libration of a Double-Decker Porphyrin Visualized by Otsuki, Joe, Komatsu, Yuji, Kobayashi, Daiya, Asakawa, Masumi, Miyake, Koji

“…Scanning tunneling microscopy has revealed the reorientation of one of the macrocyclic rings of the double-decker porphyrin complex [Ce(TPP-Fc)(C22OPP)]…”
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Molecular Motion of Surface-Immobilized Double-Decker Phthalocyanine Complexes by Miyake, Koji, Fukuta, Megumi, Asakawa, Masumi, Hori, Yukari, Ikeda, Taichi, Shimizu, Toshimi

“…The molecular motion of surface-immobilized double-decker phthalocyanine complexes was examined using STM. (C8OPc)2Ce (1), (C12OPc)2Ce (2), and (C8OPc)Ce(Pc)…”
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Arrays of Double-Decker Porphyrins on Highly Oriented Pyrolytic Graphite by Otsuki, Joe, Kawaguchi, Satoru, Yamakawa, Toshihisa, Asakawa, Masumi, Miyake, Koji

“…Three double-decker complexes of cerium(IV) were synthesized, which commonly have a 5,10,15,20-tetrakis(4-docosyloxyphenyl)porphyrin (C22OPP) moiety as one of…”
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Antimicrobial Nanotubes Consisting of Ag‐Embedded Peptidic Lipid‐Bilayer Membranes as Delivery Vehicles by Zhou, Yong, Kogiso, Masaki, Asakawa, Masumi, Dong, Sijun, Kiyama, Ryoiti, Shimizu, Toshimi

“…Functional drug‐delivery vehicles consisting of Ag‐embedded bilayer membranes of a peptidic lipid nanotube (LNT) are synthesized. The Ag–LNTs possess…”
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Semisolid Phase Synthesis of Metal-complexed Organic Nanotubes by Kogiso, Masaki, Aoyagi, Masaru, Asakawa, Masumi, Shimizu, Toshimi

“…The first semisolid phase synthesis of organic nanotubes was achieved by mixing an aqueous solution of metal salt with an alcoholic dispersion of glycylglycine…”
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Copper(II)-coordinated organic nanotube: A novel heterogeneous catalyst for various oxidation reactions by Chattopadhyay, Tanmay, Kogiso, Masaki, Asakawa, Masumi, Shimizu, Toshimi, Aoyagi, Masaru

“…Copper(II)-coordinated organic nanotube can function as a heterogeneous catalyst for oxidation of a variety of organic compounds in the presence of hydrogen…”
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Alkyl Chain Length Dependence of the Self-Organized Structure of Alkyl-Substituted Phthalocyanines by Miyake, Koji, Hori, Yukari, Ikeda, Taichi, Asakawa, Masumi, Shimizu, Toshimi, Sasaki, Shinya

“…The alkyl chain length on alkyl-substituted phthalocyanines (C n OPc) dependence of their self-organized structures was examined in this study. STM results…”
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Effective Synthesis of Polymer Catenanes by Cooperative Electrostatic/Hydrogen-Bonding Self-Assembly and Covalent Fixation by Ishikawa, Kazuyuki, Yamamoto, Takuya, Asakawa, Masumi, Tezuka, Yasuyuki

“…The cooperative electrostatic and hydrogen-bonding self-assembly of polymer precursors and the subsequent covalent conversion have been demonstrated as an…”
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Threading-Followed-by-Shrinking Protocol for the Synthesis of a [2]Rotaxane Incorporating a Pd(II)−Salophen Moiety by Yoon, Il, Narita, Mamiko, Shimizu, Toshimi, Asakawa, Masumi

“…This communication describes a new protocol for the construction of [2]rotaxanes:  “threading-followed-by-shrinking”. This approach involves the threading of a…”
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Facile Fabrication and Magnetic Properties of a One-Dimensional Magnetite Peapod in a Lipid Nanotube by Han, Youn-Gyu, Aoyagi, Masaru, Asakawa, Masumi, Shimizu, Toshimi

“…Magnetite nanoclusters (MNCs) were aligned one-dimensionally in the hollow cavity of a lipid nanotube (LNT) as a peapod using a simple mixing method in an…”
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Scanning Tunneling Microscopy Observation of Self-Assembled Monolayers of Strapped Porphyrins by Ikeda, Taichi, Asakawa, Masumi, Miyake, Koji, Goto, Midori, Shimizu, Toshimi

“…In this paper, we reveal that the free-base and zinc strapped porphyrins possessing long alkyl chains, C24OPP-HQ and Zn(C24OPP-HQ), respectively, can be…”
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A Simple N-Acyl-L-amino Acid Constructed Metal-complexed Organic Nanotube Having an Inner Diameter below 10 nm by Mukai, Masaru, Aoyagi, Masaru, Minamikawa, Hiroyuki, Asakawa, Masumi, Shimizu, Toshimi, Kogiso, Masaki

“…A novel metal-complexed organic nanotube (M–ONT) having an inner diameter below 10 nm was readily prepared from simple N-acyl-L-phenylalanine and nickel(II)…”
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Supramolecular nanofiber formation from commercially available arginine and a bola-type diacetylenic diacid via hydrogelation by Mukai, Masaru, Kogiso, Masaki, Aoyagi, Masaru, Asakawa, Masumi, Shimizu, Toshimi, Minamikawa, Hiroyuki

“…A diacetylenic-acid arginine salt gelated water. The supramolecular structure and optical properties of the resultant hydrogel were examined by optical…”
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STM Observation of Alkyl-Chain-Assisted Self-Assembled Monolayers of Pyridine-Coordinated Porphyrin Rhodium Chlorides by Ikeda, Taichi, Asakawa, Masumi, Goto, Midori, Miyake, Koji, Ishida, Takao, Shimizu, Toshimi

“…Alkyl-chain-assisted self-assembled monolayers of pyridine-coordinated porphyrin rhodium chlorides were observed at the solid−liquid interface by scanning…”
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STM Observation of Labile Axial Ligands to Zinc Porphyrin at Liquid/Solid Interface by Otsuki, Joe, Seki, Emiko, Taguchi, Toshiharu, Asakawa, Masumi, Miyake, Koji

“…Observation of labile axial ligand coordination to zinc porphyrins on a graphite surface at liquid/solid interface was achieved by scanning tunneling…”
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Synthesis of a [2]Rotaxane Incorporating a Ni(II)−Salen Moiety:  Evidence of Ring-Opening-and-Closing Protocol by Yoon, Il, Narita, Mamiko, Goto, Midori, Shimizu, Toshimi, Asakawa, Masumi

“…We have synthesized a [2]rotaxane from a crown-ether-like macrocycle that undergoes ring opening and closing through cleavage and formation of imino bonds of a…”
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Transition Metal(II)-Salen and -Salophen Macrocyclic Complexes for Rotaxane Formation: Syntheses and Crystal Structures by Narita, Mamiko, Yoon, Il, Aoyagi, Masaru, Goto, Midori, Shimizu, Toshimi, Asakawa, Masumi

“…We used a “threading‐followed‐by‐shrinking” approachto prepare [2]rotaxanes possessing nickel(II)–salen and–salophen moieties. Reactions of macrocycles…”
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A Chemically and Electrochemically Switchable [2]Catenane Incorporating a Tetrathiafulvalene Unit by Asakawa, Masumi, Ashton, Peter R., Balzani, Vincenzo, Credi, Alberto, Hamers, Christoph, Mattersteig, Gunter, Montalti, Marco, Shipway, Andrew N., Spencer, Neil, Stoddart, J. Fraser, Tolley, Malcolm S., Venturi, Margherita, White, Andrew J. P., Williams, David J.

“…A mechanical switch in a [2]catenane, made up of a cyclobis(paraquat‐p‐phenylene) tetracation interlocked with a macrocyclic polyether containing a…”
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Switching “On” and “Off” the Expression of Chirality in Peptide Rotaxanes by Asakawa, Masumi, Brancato, Giuseppe, Fanti, Marianna, Leigh, David A, Shimizu, Toshimi, Slawin, Alexandra M. Z, Wong, Jenny K. Y, Zerbetto, Francesco, Zhang, Songwei

“…The hydrogen-bond-directed synthesis, X-ray crystal structures, and optical properties of the first chiral peptide rotaxanes are reported. Collectively these…”
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