Search Results - "Ikai, Tomoyuki"

Structure Control of Polysaccharide Derivatives for Efficient Separation of Enantiomers by Chromatography by Ikai, Tomoyuki, Okamoto, Yoshio

“…The development of polysaccharide derivatives for use in chromatographic separation is investigated. There are two approaches, and each is examined…”
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The dawn of chiral material development using saccharide-based helical polymers by Ikai, Tomoyuki

“…Polysaccharides, such as cellulose and amylose, are abundant and optically active carbohydrate-based resources. Their suitably modified derivatives (for…”
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Synthesis and application of immobilized polysaccharide-based chiral stationary phases for enantioseparation by high-performance liquid chromatography by Shen, Jun, Ikai, Tomoyuki, Okamoto, Yoshio

“…•Synthesis and immobilization methods of polysaccharide derivatives.•Efficient immobilization of polysaccharide derivatives bearing trialkoxysilyl…”
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Switchable enantioseparation based on macromolecular memory of a helical polyacetylene in the solid state by Shimomura, Kouhei, Ikai, Tomoyuki, Kanoh, Shigeyoshi, Yashima, Eiji, Maeda, Katsuhiro

“…In the chromatographic separation of enantiomers the order of elution is determined by the strength of diasteromeric interactions between the components of the…”
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Stereospecific Synthesis of Enantiopure [6]Helicene Containing a Seven‐Membered Ring and [7]Helicene by Acid‐Promoted Stepwise Alkyne Annulations of Doubly Axial‐Chiral Precursors by Ikai, Tomoyuki, Oki, Kosuke, Yamakawa, Shoya, Yashima, Eiji

“…Enantiopure [6]helicene containing an embedded seven‐membered ring and carbo[7]helicene (>99 % ee) with opposite helicity were simultaneously and…”
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Chiral HPLC for efficient resolution of enantiomers by Okamoto, Yoshio, Ikai, Tomoyuki

“…Resolution of racemic compounds is one of the potential ways of obtaining both enantiomers. Among several resolution techniques in the past few decades, direct…”
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Remote Control of One‐Handed Helicity in Polyacetylenes through Flexible Spacers in Water: Impact of the Spacer Length by Ikai, Tomoyuki, Nakamura, Koshi, Mizumoto, Kosuke, Oki, Kosuke, Yashima, Eiji

“…We report the unprecedented sergeants and soldiers (S&S)‐type remote control of one‐handed helicity in copolymers of chiral/achiral biphenylylacetylenes…”
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Direct Detection of Hardly Detectable Hidden Chirality of Hydrocarbons and Deuterated Isotopomers by a Helical Polyacetylene through Chiral Amplification and Memory by Maeda, Katsuhiro, Hirose, Daisuke, Okoshi, Natsuki, Shimomura, Kouhei, Wada, Yuya, Ikai, Tomoyuki, Kanoh, Shigeyoshi, Yashima, Eiji

“…We report the first direct chirality sensing of a series of chiral hydrocarbons and isotopically chiral compounds (deuterated isotopomers), which are almost…”
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One‐Handed Helical Tubular Ladder Polymers for Chromatographic Enantioseparation by Zheng, Wei, Oki, Kosuke, Saha, Ranajit, Hijikata, Yuh, Yashima, Eiji, Ikai, Tomoyuki

“…Defect‐free one‐handed contracted helical tubular ladder polymers with a π‐electron‐rich cylindrical helical cavity were synthesized by alkyne benzannulations…”
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Dithiocarbamate-modified cellulose resins: A novel adsorbent for selective removal of arsenite from aqueous media by Nakakubo, Keisuke, Hasegawa, Hiroshi, Ito, Mikiya, Yamazaki, Kazuki, Miyaguchi, Maho, Biswas, Foni B., Ikai, Tomoyuki, Maeda, Katsuhiro

“…[Display omitted] •Novel adsorbent, dithiocarbamate modified cellulose, was synthesized.•The adsorbents were highly selective to AsIII.•The adsorbent was…”
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Chiral Recognition Ability of an Optically Active Poly(diphenylacetylene) as a Chiral Stationary Phase for HPLC by Maeda, Katsuhiro, Maruta, Miyuki, Shimomura, Kouhei, Ikai, Tomoyuki, Kanoh, Shigeyoshi

“…An optically active poly(diphenylacetylene) with a pendant amide functional group was synthesized by a macromolecular reaction of the optically inactive…”
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Static Memory of Enantiomeric Helices Induced in a Poly(biphenylylacetylene) by a Single Enantiomer Assisted by Temperature- and Solvent-Driven Helix Inversion by Maeda, Katsuhiro, Shimomura, Kouhei, Ikai, Tomoyuki, Kanoh, Shigeyoshi, Yashima, Eiji

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Synthesis of Optically Active Poly(diphenylacetylene)s Using Polymer Reactions and an Evaluation of Their Chiral Recognition Abilities as Chiral Stationary Phases for HPLC by Maeda, Katsuhiro, Maruta, Miyuki, Sakai, Yuki, Ikai, Tomoyuki, Kanoh, Shigeyoshi

“…A series of optically active poly(diphenylacetylene) derivatives bearing a chiral substituent (poly- ) or chiral and achiral substituents (poly-( - - )) on all…”
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Chiral Amplification in Polymer Brushes Consisting of Dynamic Helical Polymer Chains through the Long-Range Communication of Stereochemical Information by Maeda, Katsuhiro, Wakasone, Shiho, Shimomura, Kouhei, Ikai, Tomoyuki, Kanoh, Shigeyoshi

“…The efficient hierarchical amplification of macromolecular helicity has been achieved through the long-range transfer of chiral information in polymer brushes…”
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One-Step Synthesis of One-Dimensional Supramolecular Assemblies Composed of Helical Macromolecular Building Blocks by Wada, Yuya, Shinohara, Ken-ichi, Asakawa, Hitoshi, Matsui, Sayaka, Taima, Tetsuya, Ikai, Tomoyuki

“…Living systems achieve sophisticated functions using supramolecular protein assemblies, in which the protein building blocks possess a specific secondary…”
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Cellulose phenylcarbamate-derived hybrid bead-type chiral packing materials for efficient chiral recognition by Li, Geng, Dai, Xiao, Min, Yixuan, Yu, Chang, Ikai, Tomoyuki, Zhang, Lili, Shen, Jun, Okamoto, Yoshio

“…For efficient enantioseparation, eight organic–inorganic hybrid bead-type chiral packing materials (CPMs) with high organic contents have been developed using…”
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Circularly Polarized Luminescent Triptycene-Based Polymers by Ikai, Tomoyuki, Yoshida, Takumu, Awata, Seiya, Wada, Yuya, Maeda, Katsuhiro, Mizuno, Motohiro, Swager, Timothy M.

“…A series of chiral fluorescent polymers containing optically active triptycene units in the main chain were synthesized via Sonogashira–Hagihara coupling…”
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Helical Folding of π-Conjugated Polymers Bearing Glucose-Linked Biphenyl Units in the Main Chain: Application to Circularly Polarized Luminescence Materials by Ikai, Tomoyuki, Shimizu, Sho, Kudo, Tomoya, Maeda, Katsuhiro, Kanoh, Shigeyoshi

“…We have synthesized a series of chiral π-conjugated polymers bearing glucose-linked biphenyl units in the main chain through copolymerizations of a key…”
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Chiral amplification of supramolecular coassemblies of chiral and achiral acylhydrazine-functionalized biphenyls and their copolymers by Ikai, Tomoyuki, Kawabata, Satoshi, Okuda, Shogo, Ousaka, Naoki, Yashima, Eiji

“…An optically active acylhydrazine-functionalized biphenyl (AHB) bearing L -alanine-derived oligoamide side chains with tris(alkoxy)phenyl residues at the…”
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Consecutively fused single‐, double‐, and triple‐expanded helicenes by Zheng, Wei, Ikai, Tomoyuki, Oki, Kosuke, Yashima, Eiji

“…We report the quantitative, chemoselective, and diastereospecific formation of the defect‐free C‐shaped single and S‐ and M‐shaped consecutively fused double‐…”
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