出版社：The Society of Photographic Science and Technolgy of Japan
摘要：A technique of photoacoustic spectroscopy was applied to investigations of the photochemical reaction of sensitizing dyes adsorbed on AgBr and AgCl crystals. The photoacoustic signal of 1, 1'- diethyl-2, 2'-cyanine adsorbed on the crystals decreased with exposure to an excitation light longer than 500 nm without any appreciable shift of the spectrum, which may be related to a rather drastic decomposition of the chromophores of the dye. On the other hand, the maximum of the spectrum of rhodamine B exhibited a gradual hypsochromic shif t in the course of exposure, which was considered to be due to the occurrence of an efficient N-deethylation of the dye. This technique could easily solve problems of in situ observation of a sensitizing dye adsorbed on silver halide crystals and will be applicable to the study of various photochemical reactions in the photographic materials which are very difficult to study by other techniques.
