The irradiation of zinc hydroxy azide Zn(OH)2−x(N3)x, fresh and aged both, with a full output from a high pressure mercury arc results in a spontaneous evolution of nitrogen. The photodecomposition has been carried out as a function of intensity, wavelength of light and temperature. The rate of photolysis on prolonged irradiation for about 1000 minutes continuously decreases to a steady state value. Based upon the assumption of exciton formation and their getting trapped at special sites, a kinetic scheme is worked out which leads to linear dependence of the rate on number of special sites and intensity of radiation. Filters have been used to identify the regions of wavelengths to which the compound is sensitive. The rates of photolysis of the aged sample at all intensities are found to be lower than the corresponding rates for the fresh sample.
Volume 134, 2022
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