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Toshio Ishii
Tsurumi University
Analytical chemistryInorganic chemistryLangmuir–Blodgett filmChemistryMonolayer
53Publications
13H-index
508Citations
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Publications 53
Newest
#1Satoshi NakataH-Index: 24
#2Junko KirisakaH-Index: 3
Last. Toshio IshiiH-Index: 13
view all 4 authors...
Control of the self-motion of a camphanic acid disk on water was investigated upon the addition of different kinds of surfactants (Triton X-100 and Brij58 as neutral surfactants, cetyltrimethylammonium bromide (CTAB) as a cationic surfactant, and sodium dodecyl sulfate (SDS) as an anionic surfactant) to the water phase. With an increase in the concentration of surfactant, continuous motion changed to no motion via intermittent motion (repetition between motion and rest), and the concentration re...
21 CitationsSource
Oxovanadium(IV) and (V) complexes with a pentadentate Schiff base ligand, [V I V O(HL)].H 2 O {H 3 L: N,N'-bis(3-ethoxysalicylidene)-2-hydroxy-1.3-propanediamine} and [V V O(L)].CH 3 CN, were prepared by the reaction of the Schiff base ligand with [V I V O(acac) 2 ] (H 2 acac: acetylacetone) in CH 3 CN under an argon atmosphere and in air, respectively. IR data of the complexes indicate that [V I V O(HL)] and [V V O(L)] have polymeric (...V=O...V=O...) and monomeric structures, respectively, in ...
13 CitationsSource
#1Yoshiaki Hirano (Toin University of Yokohama)H-Index: 11
#2Yasuhiro F. Miura (Toin University of Yokohama)H-Index: 14
Last. Toshio Ishii (Tsurumi University)H-Index: 13
view all 4 authors...
Abstract We have studied the red-shifted and the blue-shifted bands in the mixed Langmuir–Blodgett (LB) films of the merocyanine dye (MS)–arachidic acid (C 20 )– n -octadecane (AL 18 ) ternary systems with the molar mixing ratio [MS]:[C 20 ]:[AL 18 ]=1:2: x (0.5≤ x ≤1.5). The overlapping spectra of the red-shifted and the blue-shifted bands are typically seen in the ternary systems and they are deconvoluted into the J - and H -bands. We compare the aggregation number N and the other structural p...
4 CitationsSource
#1Satoshi Nakata (Nara University of Education)H-Index: 24
#2Yuko Hayashima (Nara University of Education)H-Index: 8
Last. Toshio Ishii (Tsurumi University)H-Index: 13
view all 3 authors...
Abstract The mechanism of the self-motion of a camphoric acid boat depending on pH of aqueous solutions was investigated. The self-motion changed depending on pH of the aqueous phase (no motion (pH >10), intermittent motion (pH 6–10), and motion with a constant velocity (pH
5 CitationsSource
#1Yoshiaki Hirano (Toin University of Yokohama)H-Index: 11
#2Takuya M. Okada (Toin University of Yokohama)H-Index: 1
Last. Toshio Ishii (Tsurumi University)H-Index: 13
view all 5 authors...
Source
#1Yoshiaki Hirano (Toin University of Yokohama)H-Index: 11
#2Takuya M. Okada (Toin University of Yokohama)H-Index: 1
Last. Toshio Ishii (Tsurumi University)H-Index: 13
view all 5 authors...
We have studied the blue-shifted and the red-shifted bands formed in mixed Langmuir–Blodgett films of the merocyanine dye (MS)-arachidic acid (C20)-n-octadecane (AL18) ternary system with the molar mixing ratio [MS]:[C20]:[AL18]=1:2:x(0.5≦x≦5.0). The formation of the blue-shifted and the red-shifted bands depends on the AL18 content, and shows that the aggregation state can be modulated by changing the AL18 content. The observed overlapping spectra of the blue-shifted and the red-shifted bands a...
24 CitationsSource
#1Yoshiaki Hirano (Toin University of Yokohama)H-Index: 11
#2Jun-ichi Kawata (Toin University of Yokohama)H-Index: 4
Last. Toshio Ishii (Tsurumi University)H-Index: 13
view all 5 authors...
Abstract The layered structure of the LB films of merocyanine (MS)-arachidic acid (C20)-n-octade-cane (AL18) ternary system has been studied by means of the X-ray diffraction technique. Besides the homogeneously-stacked films of ternary system, heterogeneously-stacked films composed of alternate stacking of bilayers of the mixed system and the pure C20 were fabricated for comparison. Two different regimes are recognized in the X-ray diffraction profiles of the homogeneously-stacked films, indica...
1 CitationsSource
#1Yoshiaki Hirano (Toin University of Yokohama)H-Index: 11
#2Kunihiko N. Kamata (Toin University of Yokohama)H-Index: 2
Last. Toshio Ishii (Tsurumi University)H-Index: 13
view all 7 authors...
The layered structure in Langmuir-Blodgett (LB) films of the merocyanine dye (MS)-arachidic acid (C20) binary system and the MS–C20-n-octadecane (AL18) ternary system with low and high C20 contents ([MS]: [C20]:[AL18]=1: 2: x and 1: 5: x, 0x5.0) has been studied by means of surface pressure (π)–area (A) isotherm and X-ray diffraction measurements. The π–A isotherm measurement indicates that AL18 tends to fill the empty space of MS; however, a certain amount of AL18 is found outside of the space ...
15 CitationsSource
#1Yoshiaki Hirano (Toin University of Yokohama)H-Index: 11
#2Kunihiko N. Kamata (Toin University of Yokohama)H-Index: 2
Last. Toshio Ishii (Tsurumi University)H-Index: 13
view all 6 authors...
Abstract A blue-shifted band has been formed in the merocyanine dye -arachidic acid mixed LB films by adding octadecane molecule of various molar mixing ratios. The polarizing UV-visible absorption spectrum measurements revealed that the formation of molecular aggregates is sensitive to the mixing ratio of octadecane as a third component. The surface pressure - area isotherms indicated that a certain amount of octadecane molecule does not exist in the empty space of merocyanine dye even if mixin...
3 CitationsSource
#1Satoshi NakataH-Index: 24
#2Yasutaka IguchiH-Index: 3
Last. Toshio IshiiH-Index: 13
view all 4 authors...
The self-motion of a solid scraping at an air/water interface was investigated. The self-motion of a camphoric acid scraping changed characteristically depending on the pH of the aqueous phase. With an acidic aqueous phase, the camphoric acid scraping maintains a fairly constant velocity. At neutral pH, intermittent motion was observed. These characteristic motions are discussed in relation to the surface free energy which results when the camphoric acid layer diffuses from the scraping. The nat...
11 CitationsSource
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