研究等業績 - 原著論文 - 松本 和也
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K. Matsumoto, S. Yamakawa, T. Aoyagi, K. Haga, M. Jikei, A. Shibayama
International Journal of the Society of Material Engineering for Resources 22 ( 1-2 ) 15 - 19 2018年03月 [査読有り]
研究論文（学術雑誌） 国内共著
<p><i>m</i>-Phenylene diamine-containing compounds were synthesized via a one-pot process and subsequently used as new precipitating agents (<b>PA1</b> and <b>PA2</b>). The precipitation of Pd and Pt was studied using <b>PA1</b> and <b>PA2</b> as metal precipitants. While <b>PA1</b> exclusively precipitated Pd from a HCl solution containing Pd, Pt, and base metals, <b>PA2</b> achieved precipitation of both Pd and Pt from the metal-containing HCl solution. Mutual separation of Pd and Pt was achieved by using <b>PA1</b> and <b>PA2</b> in the first and second precipitation steps, respectively. Separation tests at varying agent loadings revealed that Pd and Pt were precipitated by forming of an ion-pair composed of a metal chloro-complex anion (i.e., [PdCl<sub>4</sub>]<sup>2－</sup> or [PtCl<sub>6</sub>]<sup>2－</sup>) and one precipitating agent molecule (i.e., divalent cation). The stoichiometric ratio of the ion-pairs was in agreement with the atomic ratios estimated from X-ray photoelectron spectroscopy results. Since the precipitation mechanism herein was based on the formation of an ion-pair, the cations of the precipitating agents only recovered Pd and Pt chloro-complex anions when the cations of the base metals were present in the solution. The different hydrophobicities of the precipitating agents enabled mutual separation of Pd and Pt.</p>
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Dispersion of single-walled carbon nanotubes in ketone solvents and effects of sonication
K. Matsumoto, T. Takahashi, Y. Jinguji, M. Jikei
International Journal of the Society of Material Engineering for Resources 22 ( 1-2 ) 20 - 24 2018年03月 [査読有り]
研究論文（学術雑誌） 国内共著
<p>The dispersibility of single-walled carbon nanotubes (SWCNTs) in ketone solvents, acetone and methyl ethyl ketone (MEK), was studied. SWCNTs were successfully dispersed in ketone solvents by sonication and the concentrations of the SWCNT dispersions were increased with the sonication time. The size distribution and UV-Vis absorption measurements showed that the SWCNTs in MEK were uniformly and almost individually dispersed. The zeta potentials of the SWCNTs dispersed in ketone solvents negatively increased with the sonication time. Furthermore, the G/D ratios of the dispersed SWCNTs in MEK were decreased as the sonication time increased. The negative zeta potentials and the decrease in G/D ratios are considered owing to introduction of carboxylic acids induced by sonication in ketone solvents. Although the electrical conductivity of the SWCNTs dispersed in MEK was slightly decreased due to the defects, ketone solvents are practicable dispersing solvents for SWCNTs with relatively low boiling points and high accessibility. SWCNT dispersions in ketone solvents would be suitable for antistatic coatings and nano-fillers for polymer reinforcement.</p>
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K. Matsumoto, T. Ogawa, M. Jikei
Polymer Chemistry 8 ( 47 ) 7297 - 7300 2017年12月 [査読有り]
研究論文（学術雑誌） 国内共著
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HSP60 possesses a GTPase activity and mediates protein folding with HSP10
T. Okamoto, H. Yamamoto, I. Kudo, K. Matsumoto, M. Odaka, E. Grave, H. Itoh
Scientific Reports 7 ( 1 ) 2017年12月 [査読有り]
研究論文（学術雑誌） 国内共著
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Selective recovery of platinum(IV) from palladium(II)-containing solution using 4-(hexyloxy)aniline
K. Matsumoto, S. Yamakawa, M. Jikei
Chemistry Letters 46 ( 1 ) 22 - 24 2017年10月 [査読有り]
研究論文（学術雑誌） 国内共著
<p>Selective recovery of platinum (Pt(IV)) from palladium (Pd(II))-containing hydrochloric acid (HCl) solutions was studied using 4-(hexyloxy)aniline hydrochloride (HOA). Pt was selectively and quantitatively recovered as precipitates at HCl concentrations of over 4 M. Furthermore, the recovery of Pt was completed in just a few minutes. Since HOA was able to recover Pd as precipitates quantitatively at low HCl concentrations, the mutual separation of Pt and Pd was achieved by changing the concentration of HCl. X-ray photoelectron spectroscopy (XPS) measurements revealed the formation of ion-pairs composed of one metal chloro-complex anion ([PtCl<sub>6</sub>]<sup>2−</sup> or [PdCl<sub>4</sub>]<sup>2−</sup>) and two anilinium cations.</p>
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T. Akiyama, A. Ushio, Y. Itoh, Y. Kawaguchi, K. Matsumoto, M. Jikei
Journal of Polymer Science, Part A: Polymer Chemistry 55 ( 21 ) 3545 - 3553 2017年08月 [査読有り]
研究論文（学術雑誌） 国内共著
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M. Jikei, Y. Yamadoi, T. Suga, K. Matsumoto
Polymer 123 73 - 80 2017年08月 [査読有り]
研究論文（学術雑誌） 国内共著
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T. Mori, S. Masukawa, T. Kikkawa, A. Fujimori, A. Satoh, K. Matsumoto, M. Jikei, Y. Oishi, Y. Shibasaki
RSC Advances 7 ( 54 ) 33812 - 33821 2017年07月 [査読有り]
研究論文（学術雑誌） 国内共著
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Enhanced proliferation of HeLa cells on PLLA-PCL and PLGA-PCL multiblock copolymers
T. Suga, N. T. Xuyen, K. Matsumoto, M. Jikei, K. Takahashi, H. Kubota, T. Tamura
Polymer Journal 49 ( 7 ) 567 - 573 2017年07月 [査読有り]
研究論文（学術雑誌） 国内共著
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M. Jikei, Y. Yamadoi, K. Matsumoto
Polymer Journal 49 ( 4 ) 369 - 375 2017年04月 [査読有り]
研究論文（学術雑誌） 国内共著
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Synthesis and Properties of Poly(ether sulfone)-Poly(tetrahydrofuran) Multiblock Copolymers
M. Jikei, Y. Aikawa, K. Matsumoto
High Performance Polymers 28 ( 9 ) 1015 - 1023 2016年11月 [査読有り]
研究論文（学術雑誌） 国内共著
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Synthesis of Hyperbranched Poly(ether nitrile)s as Supporting Polymers for Palladium Nanoparticles
M. Jikei, K. Nishigaya, K. Matsumoto
Polymer Journal 48 ( 9 ) 941 - 948 2016年09月 [査読有り]
研究論文（学術雑誌） 国内共著
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Synthesis and Properties of Poly(L-lactide)-Poly(-caprolactone) Multiblock Copolymers by the Self-Polycondensation of Diblock Macromonomers
M. Jikei, Y. Takeyama, Y. Yamadoi, N. Shinbo, K. Matsumoto, M. Motokawa, K. Ishibashi, F. Yamamoto
Polymer Journal 47 ( 10 ) 657 - 665 2015年10月 [査読有り]
研究論文（学術雑誌） 国内共著
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Synthesis and Properties of Aromatic Polyamide Dendrimers with Polyhedral Oligomeric Silsesquioxane Cores
K. Matsumoto, K. Nishi, K. Ando, M. Jikei
Polymer Chemistry 6 ( 26 ) 4758 - 4765 2015年05月 [査読有り]
研究論文（学術雑誌） 国内共著
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Conductivity enhancement of PEDOT/PSS films by solvent vapor treatment
M. Jikei, T. Yamaya, S. Uramoto, K. Matsumoto
International Journal of the Society of Material Engineering for Resources 20 ( 2 ) 158 - 162 2014年10月 [査読有り]
研究論文（学術雑誌） 国内共著
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Synthesis and properties of long-chain branched poly(ether sulfone)s by self-polycondensation of AB2 type macromonomers
M. Jikei, D. Uchida, K. Matsumoto, R. Komuro, M. Sugimoto
Journal of Polymer Science Part A: Polymer Chemistry 52 ( 13 ) 1825 - 1831 2014年04月 [査読有り]
研究論文（学術雑誌） 国内共著
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Investigation of dispersibility of multi-walled carbon nanotubes using polysulfones with various structures
K. Matsumoto, T. Takahashi, S. Ishii, M. Jikei
International Journal of the Society of Materials Engineering for Resources 20 ( 1 ) 77 - 81 2014年04月 [査読有り]
研究論文（学術雑誌） 国内共著
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Palladium-based anion-exchange membrane fuel cell using KOH-doped polybenzimidazole as the electrolyte
T. Fujigaya, C. Kim, K. Matsumoto, N. Nakashima
ChemPlusChem 79 ( 3 ) 400 - 405 2014年01月 [査読有り]
研究論文（学術雑誌） 国内共著
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Interfacial engineering of platinum catalysts for fuel cells: Methanol oxidation is dramatically improved by polymer coating on a platinum catalyst
T. Fujigaya, M. Okamoto, K. Matsumoto, K. Kaneko, N. Nakashima
ChemCatChem 5 ( 7 ) 1701 - 1704 2013年07月 [査読有り]
研究論文（学術雑誌） 国内共著
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Effective anchoring of Pt-nanoparticle onto sulfonated polyelectrolyte-wrapped carbon nanotubes for use as a fuel cell electrocatalyst
T. Fujigaya, C. Kim, K. Matsumoto, N. Nakashima
Polymer Journal 45 ( 3 ) 326 - 330 2013年03月 [査読有り]
研究論文（学術雑誌） 国内共著