Photochemical Study of Nickel Hydroxy Azide Through Benzene Filter
I. I. Irom
KEYWORDS: FILTER, ACTINOMETRY TRAPS,EXCITONS.
This paper reports the investigated wavelength region of UV lamp that is actually responsible actually for photodecomposition of the azide and the effect it has on· the mechanism of the reactfon. The diffuse reflectance spectnun of nickel hydroxy azide shows the azidc to absorb radiation at a wavelength range of 210 to 270nm. A benzene fitter (which absorbs radiation in the region landa <280nm) is employed as light filter. The filler cuts olT ihc most actinic wavelengths of the light source leaving only a small amount of intensity of radiation to reach the sample without any significant penetration. The result is that the reaction becomes predominantly a surface reaction with a rate which accelerntes only when all the available deep surface traps are filled, unlike the case of decomposition using unfiltered radiation.