Cobalt catalysts metal-free polymers

By the transformation of a sensitizer, light energy is stored by forming quadricyclane. In the back reaction using a catalyst the stored energy is set free The most active catalysts are low molecular on N4- and N202-chelates mainly containing cobalt Polymer metal chelates are easily separable from liquids when fixed on polymer beads. 

Ions of transition metals (homogeneously or in some cases supported on polymers [5]) also effectively catalyze the autoxidation. Salts of cobalt, manganese, iron, copper, chromium, lead, and nickel are used as catalysts that allow the reactions to be carried out at lower temperatures, therefore increasing the selectivity of the oxidation (see, for example, [6]). However, it is more important that the catalyst itself may regulate the selectivity of the process, leading to the formation of a particular product. The studies of the mechanism of the transition metal salt involvement have shown their role to consist, in most cases, of enhancing the formation of free radicals in the interaction with the initial and intermediate species. 

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