Palladium complexes physical development

Other iron-based photographic systems have been devised. For example, the complex (119) can be coated with a suitable binder. Exposure reduces Fe to Fe. Treating the coating with water produces intensely colored Fe bipy complexes in exposed areas and washes unreacted salt out of unexposed areas.A system in which a ferrioxaiate complex is photolyzed to form Fe, which is then selectively complexed with a dye indicator, was discussed in Section 59.4.2. An obsolete palladiotype process relied on the photolysis of ferrioxaiate complexes to produce Fe, which in turn reduced a Pd salt to produce an image in Pd . More economical and sensitive processes today are based on amplifying a weak image in Fe or palladium nuclei by physical development. 

Second, we shall present our approach as to how to probe the palladium surfaces in more complex Pd/support catalysts, especially when the so-called metal-support interactions are expected. We shall develop our idea of how to use such chemical probes as a catalytic reaction (alkane catalytic conversion) or chemisorption in order to see important changes in the catalytic behavior. When possible, an adequate reference to available data from more sophisticated physical techniques is made. 

---