論文 - 芝﨑　祐二

Synthesis of poly(o-cresol) by oxidative coupling polymerization of o-cresol

Aiba, M., Sun, X.-C., Shibasaki, Y., Oda, M., Ooka, C., Fukuta, S., Higashihara, T., Ando, S., Ueda, M.b,, Chen, W.-C.

Journal of Polymer Science, Part A: Polymer Chemistry   57 ( 8 ) 878 - 884   2019年04月  [査読有り]

国際的学術誌  共著・分担

Enhanced antimicrobial activities of polymerized arbutin and its derivatives prepared by oxidative polymerization of arbutin

RikaKajiwara,AyakaSeto,HisayoshiKofujita YokoShiba YoshiyukiOishi, YujiShibasaki

Reactive and Functional Polymers   138   39 - 45   2019年04月  [査読有り]

国際的学術誌  共著・分担

The amplified antimicrobial activities of poly(arbutin) [poly(arb)] and its 10% octylated derivative [poly(arb)-C8 10 ] are described in this paper. Poly(arb) was prepared from monomeric arbutin via oxidative polymerization in an aqueous media, and poly(arb)-C8 10 was prepared by alkylation of poly(arb) with octyl isocyanate. The minimum inhibitory concentration of arbutin, poly(arb), and poly(arb)-C8 10 were determined to be 111, 15.2, and 52.6 mg/mL against Escherichia coli and 111, 1.00, and 1.00 mg/mL against StapHylococcus aureus, respectively. The higher antimicrobial activity of polymeric arbutin compared with monomeric arbutin was proposed to be the result of the neighboring effect of phenolic groups of polymers along with the concentration effect of the polymers on the surface of the culture plate, which was proved by ultraviolet–visible spectrophotometry.

Preparation of glycoside polymer micelles with antioxidant polyphenolic cores using alkylated poly(arbutin)s

Seto, A., Kajiwara, R., Song, J., Shin, E., Kim, B.-S., Kofujita, H., Oishi, Y., Shibasaki, Y.

RSC Advances   9 ( 14 ) 7777 - 7785   2019年04月  [査読有り]

国際的学術誌  共著・分担

Poly(amide-ether) Thermoplastic Elastomers Based on Monodisperse Aromatic Amide Segments as Shape-Memory and Moisture-Resposive Materials.

Yuji Shibasaki*Toshiki MoriAtsuhiro FujimoriMitsutoshi JikeiHideo SawadaYoshiyuki Oishi

Macromoleculers   51 ( 23 ) 9430 - 9441   2018年11月  [査読有り]

学術誌  共著・分担

A series of high-molecular-weight (Mn up to 29000) multiblock poly(N-methylbenzamide)-b-poly(ethylene glycol) polymers [poly(MABx–x-b-PEG)], utilizing monodisperse telechelic aromatic N-methylbenzamide-based molecules (MABx–x) (molar mass distribution Mw/Mn = 1.02–1.04) with H2N-PEG-NH2, were successfully prepared via conventional solution polycondensation; their shape-memory and moisture-responsive properties were thoroughly investigated. The resultant multiblock copolymers showed three thermal transitions: the glass transition (Tg) and melting (Tm) of the PEG segment at −35 and 55 °C, respectively, and Tg of the MABx-x segment at 215 °C.

Elucidation of origin of thixotropic-including properties of additive amphiphiles and creation of high-performance triamide amphiphile.

Yuto NakagawaKaede WatahikiEiichi SatouYuji ShibasakiAtsuhiro Fujimori

Langmuir   34 ( 40 ) 11913 - 11924   2018年08月  [査読有り]

学術誌  共著・分担

The spontaneous growth of helical fibers of amphiphilic diamide derivatives containing hydrocarbons with asymmetric carbon centers in their constituent hydrocarbons was investigated. 12-Hydroxystearic acid and a gemini-type surfactant obtained by the bimolecular condensation of this compound with hexamethylenediamine both impart thixotropic ability to a solvent. Although this thixotropic behavior is based on the growth of hierarchical crystalline nanofibers in the solvents, the degree of fiber growth itself was not the origin of the thixotropy. In this study, it has adopted the methods of the Langmuir monolayer and Langmuir–Blodgett films as technique to selectively and individually evaluate the behavior of 12-hydroxyl stearyl and/or stearyl chains themselves.

Synthesis of semicrystalline poly(guanamine)s based on 2-substituted-4,6-dichloro-1,3,5-triazine with α, ω-alkylene diamines, and the formation of cyclic tetramers

Shibasaki, Y., Kotaki, T., Bito, T., Sasahara, R., Idutsu, N., Fujimori, A., Miura, S., Shidara, Y., Nishimura, N., Oishi, Y.

Polymer (United Kingdom)   146 ( 20 ) 12 - 20   2018年06月  [査読有り]

国際的学術誌  共著・分担

Moderately Flexible Trans-Chelating Diphosphine Ligands Consisting of a Triazine Unit Showing High Ligand Acceleration Effect for Heck Reaction

Toshinobu Korenaga, Ryo Kowata, Tomohiro Kotaki, Yuji Shibasaki, Yoshiyuki Oishi

Bulletin of the Chemical Society of Japan   91 ( 4 ) 577 - 584   2018年04月  [査読有り]

学術誌  共著・分担

Originally designed trans-chelating diphosphine ligands with moderate flexibility that allows trans- to cis-isomerization and bidentate to monodentate complex form were developed. The novel ligand shows high ligand acceleration effect (LAE) for Heck reaction. The catalyst loading was decreased to 0.0001 mol%, and the turnover number (TON) reached 970,000. The catalytic cycle was evaluated by DFT calculations.

Synthesis of linear polymer of intrinsic microporosity from 5,5′,6,6′-tetrahydroxy-3,3,3′,3′-tetramethylspirobisindane and decafluorobiphenyl

Sato, H., Nakajo, S., Oishi, Y., Shibasaki, Y

Reactive and Functional Polymers   125   70 - 76   2018年04月  [査読有り]

国際的学術誌  共著・分担

Preparation of fluoroalkyl end-capped vinyltrimethoxysilane oligomeric silica/boric acid/poly(N-methyl benzamide)-b-poly(propylene oxide) block copolymer nanocomposites – no weight loss behavior of the block copolymer in the nanocomposites even after calcination at 800 °C

Aomi, Y., Oishi, Y., Shibasaki, Y., Aikawa, Y., Jikei, M., Nishida, M., Yamazaki, S., Sawada, H.

Journal of Sol-Gel Science and Technology   85 ( 2 ) 318 - 329   2018年02月  [査読有り]

国際的学術誌  共著・分担

Effect of the isothermal crystallization method on amorphous block copolymers of aromatic polyamides and their packing behavior in two-dimentional films for screening of potential crystallization ability.

Y., Shidara, T., Yunoki, S., Miura, Y., Shibasaki, A., Fujimori

Polymer Engineering & Science   58 ( 11 ) 2019 - 2030   2017年12月  [査読有り]

学術誌  共著・分担

The power of the ring: A pH-responsive hydrophobic epoxide monomer for superior micelle stability

Song, J., Palanikumar, L., Choi, Y., Kim, I., Heo, T.-Y., Ahn, E., Choi, S.-H., Lee, E., Shibasaki, Y., Ryu, J.-H., Kim, B.-S

Polymer Chemistry   8 ( 46 ) 7119 - 7132   2017年12月  [査読有り]

国際的学術誌  共著・分担

Rapid synthesis and properties of segmented block copolymers based on monodisperse aromatic poly(N-methyl benzamide) and poly(propylene oxide)

T. Mori, S. Masukawa, T. Kikkawa, A. Fujimori, A. Satoh, K. Matsumoto, M. Jikei, Y. Oishi

RSCAdvances   7   33812 - 33821   2017年06月  [査読有り]

国際的学術誌  共著・分担

Preparation and optical properties of polyimide films linked with porphyrinato Pd (II) and Pt (II) complexes through a triazine ring and application toward oxygen sensors

Kimura, T., Watanabe, S., Sawada, S.-I., Shibasaki, Y., Oishi, Y

Journal of Polymer Science, Part A: Polymer Chemistry   55 ( 6 ) 1086 - 1094   2017年04月  [査読有り]

国際的学術誌  共著・分担

High-Density Packing of Amorphous Polymer with Bulky Aromatic Rings in Interfacial Molecular Films

Miura, S., Shidara, Y., Yunoki, T., Shibasaki, Y., Fujimori, A

Macromolecular Chemistry and Physics   218 ( 7 )   2017年01月  [査読有り]

国際的学術誌  共著・分担

Synthesis of highly refractive and highly fluorescent rigid cyanuryl polyimines with polycyclic aromatic hydrocarbon pendants

T. Kotaki, N. Nishimura, M. Ozawa, A. Fujimori, H. Muraoka, S. Ogawa, T. Korenaga, E. Suzuki, Y. Oishi

Polymer Chemistry   2016 ( 7 ) 1297 - 1308   2016年07月  [査読有り]

国際的学術誌  共著・分担

Architecture-​controlled synthesis of redox-​degradable hyperbranched polyglycerol block copolymers and the structural implications of their degradation

Son, Suhyun; Park, Haeree; Shin, Eeseul; Shibasaki, Yuji; Kim, Byeong-Su

Journal of Polymer Science, Part A: Polymer Chemistry   2016 ( 54 ) 1752 - 1761   2016年06月  [査読有り]

国際的学術誌  共著・分担

Water-soluble polyphenol synthesis via oxidative coupling polymerisation of β-arbutin with copper catalyst in alkaline media

Hashimoto, M., Iwabuchi, S., Oishi, Y

European Polymer Journal   81   152 - 160   2016年06月  [査読有り]

国際的学術誌  共著・分担

Synthesis of highly transparent poly(amide–imide)s based on trimellitic acid and dependence of thermal properties on monomer sequence

Kobayashi, Y., Fujiwara, Y., Kitaoka, T., Oishi

Reactive and Functional Polymers   108   78 - 85   2016年06月  [査読有り]

国際的学術誌  共著・分担