PHOTOCHEMICAL REACTIONS IN THE ALKALI HALIDES,
Abstract
Photochemical properties of potassium chloride crystals prepared in various ways were investigated. Crystals doped with K2SO4 behave similarly to those grown from A.R. KC1 without purification (apart from recrystallisation from aqueous solution). The A.R. crystals do not show the characteristic OH(-) absorption band at 204 microns but they nevertheless develop several new abosrption bands on exposure to UV irradiation. It has been shown that these bands arise from the photolysis of a centre which has an absorption band at 187 microns. This centre is removed by annealing A.R. crystals in chlorine and it is absent in crystals grown from a melt which has been pre-treated with chlorine. It is suggested that the new absorption band is due to M(2+)(OH-)2 complexes. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1963
- Accession Number
- AD0421583
Entities
People
- P. W. M. Jacobs
- U. Grassano
Organizations
- Imperial College London