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Volume 61 (1998)
- Issue 6 Pages 328-
- Issue 5 Pages 261-
- Issue 4 Pages 207-
- Issue 3 Pages 125-
- Issue 2 Pages 72-
- Issue 1 Pages 3-
Volume 61, Issue 5
Displaying 1-7 of 7 articles from this issue
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Kazuko SHIRAI, Jae-yun JAUNG, Masaru MATSUOKA, Koushi FUKUNISHI1998 Volume 61 Issue 5 Pages 261-267
Published: October 25, 1998
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSAbsorption and fluorescence spectra of new dicyanopyrazine dyes have been correlated with their chemical structures. The optimized structures were obtained by using MOPAC PM3 method and their stacking behavior of π-chromophoric systems were evaluated from the three dimensional molecular structures. Steric requirements of the substituents to the parent chromophoric system affected largely on their spectral changes in λmax, Fmax and εmax values.View full abstractDownload PDF (879K) -
Application of Copolymers of Benzylmonooxime Methacrylate to Posi-type PhotopolymerIkuo NAITO, Shinya SAITO, Akiharu HASEME, Hajime NISHIGABIRAKI1998 Volume 61 Issue 5 Pages 268-275
Published: October 25, 1998
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSPhotodegradations of the copolymer of benzylmonooxime methacrylate (BIMA) with methyl methacrylate (MMA) or t-butyl methacrylate (BMA) were studied for application to photosensitive materials. The absorbance at λmax (=254 nm) and the molecular weights of the copolymers decreased drastically according to the irradiation time. Quantum yields of main chain degradation were estimated to be 0.07 (MMA copolymers) and 0.19 (BMA copolymers). The photoreactivity of MMA-BMA-BIMA terpolymer (BIMA, 1-2 mol% in polymer) increased with increasing BMA unit in the copolymer. The reactions were also carried out in film state. The sensitivities of the copolymers containing over 60 mol% of BMA unit were determined to ca. 20 (293 K) and 10 mJ cm-2 (423 K)View full abstractDownload PDF (957K) -
Jiro ABE, Yasuo SHIRAI, Fusae MIYATA, Yu NAGASE, Nobukatsu NEMOTO1998 Volume 61 Issue 5 Pages 276-283
Published: October 25, 1998
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSThe present study describes a new approach to the molecular design for the second -order non-linear optical (NLO) material by the use of heterocyclic betaines. The new approach is based on a short-range charge transfer from the charged electron donor group to the charged electron acceptor group linked with directly, which will cause a large difference between the dipole moments in the excited and the ground states. Based on the enhanced charge separation between the pyridinium and benzimidazole rings, the betaines can be represented as a D- (donor)-A+ (acceptor) system having a very large ground -state dipole moment in the direction from D- to A+ The inversion of the dipole moment direction upon electronic excitation is the most remarkable feature of the heterocyclic pyridinium betaines. This nature of the betaines makes it possible to manipulate the ground-state dipole moment and molecular hyperpolar-izabilities (β). The ab initio and INDO/S molecular orbital calculations have shown that the reduction of the ground-state dipole moment, and the enlargement of the excited-state dipole moment and β would be achieved by a D-A+-π-A system, in which a traditional A is introduced through a π-conjugation path attached to At On the other hand, the enlargement of the ground-state dipole moment and the reduction of β was achieved by a D-A+-π-D system. It is shown from the measurement of β with the hyper-Rayleigh scattering technique that this concept for manipulation of the dipole moments and β can be used to construct more efficient second-order NLO materials based on the heterocyclic pyridinium betaine structures.View full abstractDownload PDF (4802K) -
Masaru KATO, Makoto OMODANI, Kenichiro NAKAMURA1998 Volume 61 Issue 5 Pages 284-287
Published: October 25, 1998
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSThe absorption and fluorescence spectra of thiacyanine dyes, 3, 3'-dioctadecyl-2, 2'-thiacyanine perchlorate (DTB), in LB film were measured. LB film of CTB showed D, M and J bands in absorption spectrum, while J and M bands were found in fluorescence spectrum. Fluorescence intensity of DTB in LB film was decreased with irradiation and it was increased with heating. Thus, a memory effect was found in fluorescence from LB film of DTB by cyclic irradiation and heating.View full abstractDownload PDF (457K) -
Teiji HABU, Toshikazu NISHIDE, Makoto HIRAI, Tsuyoshi MORISIMA1998 Volume 61 Issue 5 Pages 288-295
Published: October 25, 1998
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSIn the previous paper, we reported that efficiency of photochromism (PC) of amorphous tungsten oxide film was increased by lamination of PVA layer.
In this paper, we found the other some water soluble polymers ; polyacrylic acid (PAA), polyethylene glycol (PEG) and polyvinyl pyrrolidone (PVP) were effective for PC of tungsten oxide film by lamination of them. Among these polymers, PVP showed prominent PC efficiency.
Furthermore, we found that PVP did mix directly with H2WO4 sol freely. Tungsten oxide film made by this direct mixing was also very effective for PC and showed a stable repetition of coloration and of decoloration characteristics. An adequate adding PVP quantity for PC was found.
We paid attention to 2-pyrrolidone that was the side chain of PVP. PC of amorphous tungsten oxide film made by direct mixing of 2-pyrrolidone showed same behavior as that of PVP. As increasing mole ratio of 2-pyrrolidone for mol of WO3, PC efficiency was improved up to around 0.3, over that enfeebled. It was found by AFM inspection that the grain size of amorphous tungsten oxide was controlled by addition of 2-pyrrolidone, the more mole ratio of 2-pyrrolidone, the less grain size. We recognized through FT-IR spectrum that tungsten oxide was linked to 2-pyrrolidone by hydrogen bond. A mechanism for coloration of tungsten oxide with 2-pyrrolidone was proposed.View full abstractDownload PDF (6439K) -
Sadamitsu NISHIHARA, Hiroshi FUJITA, Akiyoshi OTSUKA, Atsushi TAKIGAWA ...1998 Volume 61 Issue 5 Pages 296-299
Published: October 25, 1998
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSThe purpose of this paper is to evaluate the input-output characteristic in a new dry -type laser imager. The result for the “stepwedge” sample indicated a good linearity of the input -output characteristic in diffuse density. On the other hand, the tone-jump effect was observed at diffuse densities of about 0.66 and 1.15 in microdensitometry for the “continuous” gray-scale sample. The existence of the tonejump effect has to be carefully considered in observing clinical images.View full abstractDownload PDF (4140K) -
Seiji SUZUKI, Naoko HARA, Hideo MIYAZAKI, Kiyotaka HORI1998 Volume 61 Issue 5 Pages 300-305
Published: October 25, 1998
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSBiological treatment is considered as the ultimate treatment process for degradation of photoprocessing waste solution due to its low environmental impact. But it still has the problem of incomplete degradation, since photoprocessing waste solution contains hardly degradable compounds such as Ethylenediaminetetraacetic acid (edta).
In the present study, we found that BAC (Biological Activated Carbon) degraded Fe (III) edta and the other hardly degradable compounds which remained after activated sludge treatment of photoprocessing waste solution. The degradation rate of Fe (III) edta and the other hardly degradable compounds by BAC was 0.042, 0.052 mg · d-1 · g-AC-1, respectively. The ability of BAC to degrade the hardly degradable compounds was enhanced by co-metabolism.View full abstractDownload PDF (826K)
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