ナフトールグリーンB水溶液の日光吸収特性

概要

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The light energy conversion of Naphthol Green B aqueous solution was examined by measuring the temperature elevation of the solution and ultraviolet and Visible absorption spectra.The temperature of NaphthoI Green B solution under the sunbeam was higher than that of distilled water and other dyestuff solutions. The largest temperature difference between NaphthoI Green B solution and distilled water was 10.7℃ at 10-2 mol / l.After two weeks explosing of the Naphthol Green B solutions under the sun, the green colour of the solution were turned to yelIowish green. The absorption band of NaphthoI Green B solution decreased and shifted to shorter wavelength at 710nm. At the same time, the shoulder absorption of 360nm to 380nm formed a new peak, and the absorbance at 380nm increased. This is considered to be based on the breaking of the complex structure and the tautomerism of free ligand. But the temperature elevation of NaphthoI Green B solution was higher than that of distilled water even under this condition.When the pH values and temperatures of NaphthoI Green B solutions were changed, the absoption spectra at 380nm based on the tautomerism of ligand and at 710nm based on the Fe(Ⅲ)　complex structure were not changed.
長野県短期大学の論文