The platinum-carbonyl sols of red colour prepared from 0.02 as well as 0.05% aqueous solutions of chloroplatinic acid were dialyzed in the atmosphere of carbon monoxide, as they would turn black to convert into platinum sols when treated in the air, until freed from chlorine ions. The sols obtained through the process were just the same in appearance as well as in behaviour as they were formerly. This implies that the particles in the red sols, dialyzed or not, are fundamentally constituted from platinum and carbon monoxide or platinum-carbonyl.
(1) Energy distribution curves of the fluorescence spectra of pure ZnS and ZnS/Cu phosphors were measured at −185°, 20°, and 150°C. (2) Four fluorescence bands were observed in the pure ZnS phosphors containing no activator and no flux. It was pointed out that these four fluorescence bands may be correlated with the transitions &^1P_1→^1S_0=4670Å=η &^3P_2→^1S_0=4670Å=ζ &^3P_1→^1S_0=5085Å=ε &^3P_0→^1S_0=5455Å=γ
of the electron of the Zn atom in the activation centre. (3) In the ZnS phosphors activated by Cu, three bands α, β and β1 were observed. These three fluorescence bands may be correlated with the transitions &^3D_3→^1S_0=5260Å=α &^3D_2→^1S_0=4410Å=β &^3D_1→^1S_0=4245Å=β_1
of the electron of the cu+ ion in the activation centre. (4) The effect of the temperature and of the amount of the activator, and flux on the fluorescence spectra were discussed.
The catalytic action of metallic phthalocyanines towards the aut-oxidation of linseed oil and methyl linoleate is demonstrated. Chloriron phthalocyanine is remarkably effective as catalyst, whereas copper- and magnesium phthalocyanine are slightly effective.