巻号一覧
45 巻, 2 号
選択された号の論文の7件中1～7を表示しています
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1982 年 45 巻 2 号 p. 73
発行日: 1982/04/28
公開日: 2011/08/11
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酸型およびNa塩型トリフェニルメタン系色素における光起電力金 榮順, 高橋 恭介, 坂田 俊文1982 年 45 巻 2 号 p. 75-84
発行日: 1982/04/28
公開日: 2011/08/11
ジャーナル フリーSurface photovoltage measurements was employed for studying the sensitization mechanism of triphenylmethane dyes from the relationships of the adsorption state of dye molecules on zinc oxide powder surfaces. In the case of the acid type dyes of triphenylmethanes, experimental curves agree well with the theoretical results of light intensity dependences of photovoltage Vp and d Vp/dt. It is found that the acid type dye adsorption on zinc oxide unaffects to zinc oxide intrinsic photoresponse. On the other hand, the Na salt type dye adsorption on zinc oxide shows the desensitization for zinc oxide intrinsic photoresponse, because the adsorbed molecules of the ground state attribute to recombination process of the free carriers photo-generated in zinc oxide bulk. It is concluded that the carboxylic or sulfonic radical of dyes will be mainly attracted to adsorption sites. And the mechanism of dye sensitization on zinc oxide surface is proposed that the electrons of excited dyes is mainly transferred to conduction band through the hydroxyl radical.抄録全体を表示PDF形式でダウンロード (1148K) -
分子内水素供与体の有無による反応性の比較田中 勝彦, 小門 宏1982 年 45 巻 2 号 p. 85-90
発行日: 1982/04/28
公開日: 2011/08/11
ジャーナル フリーPhotochemical behaviors of 2-isopropoxy-1, 4-naphthoquinone (IPNQ) which has an intramolecular hydrogen donor adjacent to one of its carbonyl oxygens, have been investigated in cellulose acetate film, and compared with those of 2-methyl-1, 4-naphthoquinone (MNQ) which has no intramolecular hydrogen donor.
The quantum yield of photoreduction in film increased by addition of benzhydrol which served as a hydrogen donor but leveled off at 0.5 for both IPNQ and MNQ. When no benzhydrol was present, however, the quantum yield was 0.3 for IPNQ, three times larger than that for MNQ. For photographic applications, it dose not seem to be necessary to add hydrogen donors to IPNQ.
Photo-generated reductants from quinones undergo air oxidation. The reaction was pseudounimolecular as to the concentration of reductants, with the rate constants 1.0×10-4 min-1 and 4.8×10-4 min-1, or with the half-lives 115 hr and 24 hr, for IPNQ and MNQ at 20°C, respectively. The activation energy was measured for IPNQ and found to be 12 kcal/mol. The frequency factor was as small as 103, suggesting that the latent image consisting of reductants are relatively stable against the variation of storage temperature.抄録全体を表示PDF形式でダウンロード (802K) -
米沢 義朗, 百木 康人, 種村 初実, 羽田 宏1982 年 45 巻 2 号 p. 91-97
発行日: 1982/04/28
公開日: 2011/08/11
ジャーナル フリーPhotographic density and the amount of reduced silver of semiconductor-Ag+ plates have been measured for varying exposure to UV-light. The observed quantum yields of Ag+ reduction are in a similar magnitude to those in semiconductor-Ag+ aqueous suspensions. Both the rate of increase of photographic density and the quantum yield increase with the amount of Ag+ contained in the plates. These results can be interpreted by the concept of semiconductor electrochemistry. It is proposed that measurements of surface photovoltage and photocurrent are useful for judging the photochemical sensitivity of the plates.抄録全体を表示PDF形式でダウンロード (905K) -
長江 和子, 中村 賢市郎, 佐々木 政子, 坂田 俊文1982 年 45 巻 2 号 p. 98-103
発行日: 1982/04/28
公開日: 2011/08/11
ジャーナル フリーA new method was introduced in order to improve accuracy of color matching by using the Kubelka-Munk theory. In the color matching calculation, experimental spectral reflection data of mixed colorants were adopted with those of originals, and both separated scattering coefficients and absorption coefficients derived from the K/S value were taken into consideration.
The spectral color matching calculation was carried out with a weight value at each wavelength. Satisfactory results were obtained in the calculation for the color samples specified in Japan Industrial Standards for Color Rendering Properties (JIS-Z-8726). Advantages of this method are that the calculated result is fairly coincident with the sample data obtained experimentally from the calculated mixing ratio, and that the matched data have wide rendering tendency for different color tempera tures of light sources.抄録全体を表示PDF形式でダウンロード (646K) -
伊藤 宏1982 年 45 巻 2 号 p. 104-109
発行日: 1982/04/28
公開日: 2011/08/11
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村井 俊治1982 年 45 巻 2 号 p. 110-116
発行日: 1982/04/28
公開日: 2011/08/11
ジャーナル フリーPDF形式でダウンロード (17643K)
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