Metalloids in the Sidechain

There are numerous examples of polymers in which the metal or metalloid is present in the sidechain of the macromolecule. Polymer 57 is an organometaUic polystyrene is which the chromium tricarbonyl moieties are 7t-coordinated to some of the benzene rings attached to polymer backbone. The polynorbomene copolymer (58) incorporates polyhedral oligomeric silsesquioxane moieties into its sidechains.  

Polymer 59 is an example of a polystyrene substituted with sidechain zinc phthalocyanine moieties. These polymers formed aggregates in solution even with small degrees of phthalocyanine incorporation. Aggregates result from phthalocyanine (cofacial) stacking interactions. 

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