Journal of The Society of Photographic Science and Technology of Japan

Photographic Activity of Cyanine Dye J-aggregates

B. I. SHAPIRO

1992 Volume 55 Issue 2 Pages 55-60
Published: April 28, 1992
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11454/photogrst1964.55.55

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The main self-desensitization inhibition methods, i. e., main Supersensitization methods of photographic layers, are considered based on assumption about the role of limiting hole selfdensensitization of J-aggregating dyes. Special attention is paid to “isolation” mechanism of supersensitization and J-aggregation regulation methods.

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Photofading of Solution of Azomethine Type Dye Forming Color Photographic Image; Alcoholic Solution of Model Magenta Dye with Carbonyl Compound

Takuji MIWA, Youichi ASAHI

1992 Volume 55 Issue 2 Pages 61-71
Published: April 28, 1992
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11454/photogrst1964.55.61

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In order to elucidate photofading mechanism of aerated alcoholic solution of model magenta dye with carbonyl compound (CCPD), 1) effect of acid on photofading of alcoholic solution of model magenta dye with CCPD, 2) effect of NaOH, 3) effect of oxygen concentration, 4) absorption change of the photolytically faded solution by keeping in dark, addition of NaOH-EtOH solution and light irradiation after unsealing, are examined at various conditions. Also photofadingproduct in aerated alcoholic solution of model magenta dye with CCPD is examined by mass spectroscopy. It is confirmed that photofading of the solution is initiated by ketyl radical of CCPD and following reactions resulted in formation of oxygenated compound and degradation of the dye are started probably from mono-hydrogenated dye radical in the same way as aerated solution of model cyan dye. Moreover it is estimated that the most part of the difference in details between fading reactions of model magenta and cyan dyes is caused by higher reactivity of mono-hydrogenated radical and leuco-form of magenta dye with oxygen in comparison with cyan dye.

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Photonics Materials

Kazuhito HASHIMOTO

1992 Volume 55 Issue 2 Pages 72
Published: April 28, 1992
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11454/photogrst1964.55.72

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Structure and Function of Liquid Crystalline Polymers

Takashi KATO

1992 Volume 55 Issue 2 Pages 73-79
Published: April 28, 1992
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11454/photogrst1964.55.73

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Liquid crystalline (LC) polymers have attracted much attention because of great potential for advanced materials. It is important to control molecular order of LC polymers for functionalization. Molecular interactions, e. g., hydrogen bonding, ionic interaction, and charge transfer interaction, can be used to regulate the molecular order of liquid crystals. LB films and elastomers of LC polymers have been fabricated for optic devices. The application of LC polymers to optic and electronic materials have been studied mainly for side-chain LC polymers. Photoresponsive and non-linear optic materials have been prepared by incorporation of dye molecules into LC polymer matrices. LC polymers exhibiting the chiral smectic C phase show ferroelectricity.

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Nonlinear Optics

Takayoshi KOBAYASHI

1992 Volume 55 Issue 2 Pages 80-89
Published: April 28, 1992
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11454/photogrst1964.55.80

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Controls of Molecular Assemblies by Photochromism

Takahiro SEKI

1992 Volume 55 Issue 2 Pages 90-97
Published: April 28, 1992
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11454/photogrst1964.55.90

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Photochromic reactions can induce reversible changes in morphorogy, physical state, orientation of molecular assemblies. This review describes photoinduced events in liquid crystals, polymeric liquid crystals, Langmuir-Blodgett films, micelles, bilayer membranes and gels. Azobenzene is the most widely employed photochromic unit as the trigger. These phenomena possess potential appcilability toward fabrication of new optical recording media, transducers of optical information, etc., and hence works in this field are rapidly developing.

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Lasing in Dye-Doped Polystyrene Microsphere

Makoto GONOKAMI, Kenji TAKEDA

1992 Volume 55 Issue 2 Pages 98-103
Published: April 28, 1992
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11454/photogrst1964.55.98

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We study the lasing behaviour of dye doped polystyrene microsphere with diameter ranging from 10μm to 92μm. Lasing of the spherical cavity modes is clearly observed. Intensity of each lasing line is strictly controlled by additional irradiation of monochromatic laser which can couple to resonance modes of the cavity. The line intensity plummets down when the additional beam frequency matches to the resonances of the modes which have the same radial profile of relevant mode. Such cross mode-interaction enables us a highly efficient data processing with micro spherical cavity.

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Report on the Measurement of Noise Wiener Spectrum

Masao INUI

1992 Volume 55 Issue 2 Pages 104-110
Published: April 28, 1992
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11454/photogrst1964.55.104

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