Výsledky vyhledávání - "Hirofumi Okabayashi"

Complex, Dynamic Behavior of Extremely Asymmetric Di-n-Alkylphosphate-Anion Aggregates, the Long-Chain Effect and the Role of a Limiting Size: Cryo-TEM, SANS, and X-Ray Diffraction Studies

Autor: Ellina Kesselman, Charmian J. O'Connor, Daphne Weihs, Judith Schmidt, Takeshi Fujita, Yeshayahu Talmon, Sonoko Sasuga, Hirofumi Okabayashi, Kenichi Izawa

Publikováno v: The journal of physical chemistry. B. 121(16)

For extremely asymmetric n-hexyl(n-decyl)phosphate (HDeP), n-hexyl(n-dodecyl)phosphate (HDoP), and n-hexyl(n-cetyl)phosphate (HCeP), the effect of the long-chains on the dynamic behavior of their aggregate structures in water was examined by cryo-TEM

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fa23649399baaa5292dad7711db1fdaf
https://pubmed.ncbi.nlm.nih.gov/28409927

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Aggregate Structures of Asymmetric Di-Alkyl Phosphate Anions and the Role of Conformations about the Polar Region: SANS, Cryo-TEM, Raman Scattering, 13C NMR, and Selective NOE Studies

Autor: Charmian J. O'Connor, Hirofumi Okabayashi, Sonoko Sasuga, Daphne Weihs, Yeshayahu Talmon

Publikováno v: The Journal of Physical Chemistry B. 116:3538-3550

The aggregate structures of two di-n-alkyl-phosphate anions (di-n-alkyl: n-butyl(n-dodecyl)(BDoP) and n-hexyl(n-dodecyl)(HDoP)) in water were studied by the use of SANS, cryo-TEM, Raman scattering, (13)C NMR, and selective NOE ((1)H{(1)H}) techniques

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3a828b0ad7f24fafeab2d3191e4e8b79
https://doi.org/10.1021/jp300019n

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Role of the Succinate Skeleton in the Disorder–Order Transition of AOT and Its Analogous Molecules: Detection by Infrared Absorption Spectra of the Configurations Arising from the Difference in Torsion Angles of the Succinate Skeleton

Autor: Charmian J. O'Connor, Kenichi Izawa, Akiko Sumiya, Julian Eastoe, Hirofumi Okabayashi

Publikováno v: Bulletin of the Chemical Society of Japan. 83:651-659

The IR spectra in the 1300–1450 cm−1 region, which reflect the CH and CH2 deformation vibrational modes of the succinate skeleton, have been investigated in detail for sodium dialkylsulfonates (alk...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::40ea57a90677d26681165a9935107bab
https://doi.org/10.1246/bcsj.20100002

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Effect of Hydration on the Very Slow Droplet–Lamellar Transition in Dioleylsulfosuccinate/Decane/Water System: A Small Angle X-ray Scattering Study

Autor: Charmian J. O'Connor, Takayoshi Takeda, Swapan K. Ghosh, Akihiro Yoshino, Naoki Ichiyanagi, Hirofumi Okabayashi

Publikováno v: Bulletin of the Chemical Society of Japan. 82:664-674

Time- and temperature-dependence of the small angle X-ray scattering (SAXS) profiles for homogeneous and transparent solutions of the sodium dioleylsulfosuccinate (SDOleS)–decane–water system with ...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9979783e693b57a18f3a4d73c77ded54
https://doi.org/10.1246/bcsj.82.664

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Two-dimensional gel permeation chromatography (2-D GPC) correlation studies of the aggregate–aggregate interactions in acid-catalyzed triethoxysilyl-terminated polystyrene systems: weak catalysis by HNO3

Autor: Jun-ichi Oku, Isao Noda, Charmian J. O'Connor, Hirofumi Okabayashi, Kenichi Izawa, Keita Suzuki

Publikováno v: Colloid and Polymer Science. 283:1070-1078

Time-resolved gel-permeation chromatography (GPC) profiles were measured over a long period of time (t=0–768 h) for the HNO3-catalyzed reaction mixture of a well-defined polymeric silane coupling agent, triethoxysilyl-terminated polystyrene. The re

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cf4e1211d8626c74196d369bb207374e
https://doi.org/10.1007/s00396-004-1237-6

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Two-dimensional gel permeation chromatography (2D GPC) correlation studies of the aggregate-aggregate interactions in acid-catalyzed triethoxysilyl-terminated polystyrene systems. The effect of specific catalysts on growth process

Autor: Charmian J. O'Connor, Hirofumi Okabayashi, Isao Noda, Jun-ichi Oku, Kenichi Izawa, Keita Suzuki

Publikováno v: Colloid and Polymer Science. 283:551-558

A set of time resolved gel-permeation chromatography (GPC) profiles, for the reaction mixture of a well-defined polymeric silane coupling agent, triethoxysilyl-terminated polystyrene with molecular weight equal to 8000 (TESi-PS (8000)), catalyzed by

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2a19a62fdb052868246aee3f91af94dd
https://doi.org/10.1007/s00396-004-1185-1

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Two-dimensional correlation gel permeation chromatography (2D GPC) study of the CH3SO3H-catalyzed polymerization of triethoxysilyl-terminated polystyrene. Molecular weight effect on the aggregate–aggregate interactions

Autor: Keita Suzuki, Isao Noda, Kenichi Izawa, Jun-ichi Oku, Hirofumi Okabayashi, Charmian J. O'Connor

Publikováno v: Colloid and Polymer Science. 283:306-316

The two-step polymerization process of two well-defined polymeric silane coupling agents, triethoxysilyl-terminated polystyrene with molecular weights equal to 2400 [TESi-PS (2400)] and 8000 [TESi-PS (8000)], catalyzed by 0.1 mol/kg CH3SO3H, was trac

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5ffadb4f6d7b4549d00cfa4eb4c3d5de
https://doi.org/10.1007/s00396-004-1144-x

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Two-dimensional correlation gel permeation chromatography study of aggregate-aggregate interactions during acid-catalyzed polymerization of triethoxysilyl-terminated polystyrene

Autor: Charmian J. O'Connor, Keita Suzuki, Jun-ichi Oku, Kenichi Izawa, Isao Noda, Hirofumi Okabayashi

Publikováno v: Journal of Polymer Science Part B: Polymer Physics. 42:3447-3460

The three-step polymerization of a well-defined polymeric silane coupling agent, triethoxysilyl-terminated polystyrene, catalyzed by acid (H3PO4), was traced as a function of the reaction time with gel permeation chromatography (GPC). Time-resolved G

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2b6fce58f01ec0e5c6e7130cfe9d2795
https://doi.org/10.1002/polb.20229

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Synthesis and Condensation of 3-(Triethoxysilyl)propyl-Terminated Polystyrene

Autor: Charmian J. O'Connor, Keita Suzuki, Hirofumi Okabayashi, Jun-ichi Oku, Mikio Takaki

Publikováno v: Polymer Journal. 35:938-944

A well-defined polymeric silane coupling agent, 3-(triethoxysilyl)propyl-terminated polystyrene (TESiP-PS) was synthesized by reaction of polystyryllithium with (3-chloropropyl)triethoxysilane. The reaction is greatly affected by reaction conditions.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c8932a252fc5b932729ae127ecf957a8
https://doi.org/10.1295/polymj.35.938

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Aggregational Effect on the Rate of Condensation of Triethoxysilyl-Terminated PolystyreneKinetic Evidence

Autor: C. J. O'connor, Keita Suzuki, Jun-ichi Oku, Hirofumi Okabayashi

Publikováno v: Langmuir. 19:7611-7615

Five well-defined polymeric silane coupling agents, triethoxysilyl-terminated polystyrene (TESi-PS), substituted with polystyrene moieties of various molecular weights, were condensed in tetrahydrofuran, in the presence of methanesulfonic acid as the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::45803d0c51c078066f5cc6cf82234149
https://doi.org/10.1021/la030091o

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