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Volume 42 (1979)
- Issue 6 Pages 339-
- Issue 5 Pages 309-
- Issue 4 Pages 227-
- Issue 3 Pages 161-
- Issue 2 Pages 91-
- Issue 1 Pages 5-
Volume 42, Issue 2
Displaying 1-6 of 6 articles from this issue
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[in Japanese]1979 Volume 42 Issue 2 Pages 91-97
Published: May 15, 1979
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSDownload PDF (3700K) -
The Formation and Conductivity of Charge Transfer Complexes of PolyvinylimidazoleRyo HIROHASHI, Michio MOMOSE, Yasushi HISHIKI1979 Volume 42 Issue 2 Pages 98-104
Published: May 15, 1979
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSPolymer with the donative side chain was obtained by radical polymerization from 2-methyl -vinylimidazole. The charge transfer complexes (CT-complex) were synthesized from polyvinylimidazole with various organic acceptors having different electron affinity. Benzoquinone (BQ), Chloranil (CA), Bromanil (BA), Tetracyanoquinodimethane (TCNQ) and Picric acid (PA) were used as acceptor compounds.
Spectrophotometric measurement revealed the formation of charge transfer states shifts the absorption band into the visible region.
Job's continuous method, infrared spectra and solution viscosity of CT-complex indicate the structure of CT-complex is a 2:1 or 1:1 complex with the acceptor with respect to the monomer unit of the polymer. Especially the formation mole ratio of donor to acceptor was decided from the maximum at the reduced viscosity-concentration curves.
Electrical conductivity was found to be in the following order of electron acceptors; CA>>PA≅TCNQ>BQ for dark conductivity and CA>>TCNQ≅PA for photo-conductivity in the visible region.
The dark and photo-conductivity of the charge transfer polymer formed by various acceptor molecules was not seen to be simply related to the electron affinities of these molecules.View full abstractDownload PDF (819K) -
On Systems of Various Aromatic Amines-TetrabromomethaneTakuji MIWA1979 Volume 42 Issue 2 Pages 105-111
Published: May 15, 1979
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSFlash photolytic investigations are made on the following systems; diphenylamine, N-phenyl-lnaphthylamine, N-phenyl-2-naphthylamine, indole, 2-methylindole, N, N-dimethylaniline, N, N'-diphenylethylenediamine-tetrabromomethane. On all systems, the absorption spectra and decay of the amine cation radicals are observed. Moreover it is confirmed that the common photoprimary process via exciplex formation, charge separation, dissociation to amine cation radical andtetrabromomethane anion radical takes place. Also the refined reaction mechanisms are presented.View full abstractDownload PDF (934K) -
Shunji TAKADA1979 Volume 42 Issue 2 Pages 112-121
Published: May 15, 1979
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSRelation botween the ionic conductivity of silver halide eumision grains and the sensitivity of sulfur-sensitized emulsions at high-intensity exposure was studied by using mono-dispersed fine grain emulsions (0.2μm). The emulsions containing grains of high ionic conductivity (σ-10-5 Ω-1 cm-1) exhibited no high-intensity reciprocity-law failure (HIRF) at the primitive stage, but they showed strong HIRF due to the dispersion of latent image when they were sulfur sensitized. The addition of CdC12 to emulsions decreased the ionic conductivity and improved this HIRF. The emulsions containing the grains of low ionic conductivity (σ-10-8 Ω-1 cm-1) showed HIRF due to the limited rate of the ionic step both in primitive and sulfur-sensitized emulsions.
The electron residence time in traps, which depends on the trap depth, and the time for the ionic step in latent image formation, which depends on the ionic conductivity, will influence the nucleation and growth processes of silver specks formation. If the time for the ionic step is shorter than the electron residence time, the dispersion of latent image will occur as the result of the increased nucle-ation probability. It is thought that the above situation is achieved when the emulsion of high ionic conductivity is sulfur sensitized.View full abstractDownload PDF (1318K) -
A Study of the Imaging Characteristics of Grainless Presensitized Plate with TAA Sub-LayerTsuyoshi MORISHIMA1979 Volume 42 Issue 2 Pages 122-127
Published: May 15, 1979
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSThe author investigated the imaging characteristics of grainless presensitized plate with TAA (titanium acetyl acetonate) sub layer.
The influence of the compositions of treating solutions and forming conditions of the sub layer on the various properties such as photographic characteristics, tone reproduction, developing property and desensitizing property was investigated.
It was found that the imaging characteristics of PS plates were affected significantly by the composition of the treating solution and the method of formations of the sub layer even if the sensitive layer consisted of the same material.
The sub layer was formed by coating the acidic solution of TAA which was synthetized by reacting 1 mol of TPT (tetra isopropyl titanate) with 2 mol of acetylacetone, and heated at 250°C. The characteristic of the image by the sensitive material was improved by the pre-formation of this sub layer.View full abstractDownload PDF (660K) -
Toshio TANAKA1979 Volume 42 Issue 2 Pages 128-131
Published: May 15, 1979
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSDownload PDF (487K)
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