Solvation spectra. Part 25.—Variation with temperature of absorption spectrum of iodide in aqueous t-butyl alcohol systems

Abstract

The energy E_max of the first absorption maximum for iodide in water increases when t-butyl alcohol is added. At a fixed temperature E_max is a linear function of alcohol mole fraction x₂ in the water-rich mixtures. The slope dE_max/dx₂ of this plot has a maximum near 4 ° and is relatively insensitive to temperature over the range 30–40°, otherwise decreasing markedly with increase in temperature. A similar trend is observed in deuterium oxide solutions.