Planar polymerized phthalocyanines

Unfortunately, these and other co-ordination pdymers having the noetal in the backbone of the chain are all too frequently, quite intractable materials. There have been attempts to improve the material properties of pdy(phthalocyanines) by incorporating ether or sulphide linls, but this has only resulted in a reduction offlieir conductivities with little if any improvement in tractability Polymerization of cone phthaiocyanines to produce the stacked ring systems (XXVI) witti X = 0 or X = OC2H4O has been accomplisted to produce conductive pdtymers, albeit of lower ccMiductivity (o = 6 x 10" ohm" cm" for X = O and 4 x 10" for X = OC2H4O) than the planar polymerized variety ... 

A clearly defined ability of porphyrins and phthalocyanines to be additionally coordinated (extracoordinated) with a planar complex of ligands occupying the 5 and 6 positions in the inner coordination sphere is completely utilized during their interaction with polymeric carriers. A survey of the macromolecular ligands used for this purpose is made elsewhere [7b, e]. 

These are the same chelate-type MCMs, but with tetradentate coordination (Table 4-1). Moreover, MCMs with a small strained structure (vinylimine, epoxide) have already been considered above. By considering MCMs with macrocycles in a separate section, we wish to focus attention on monomers of this type because of their widespread use in polymerization practice, especially, porphyrin and phthalocyanine derivatives. As we know, such macrocycles are n-conjugated planar tetradentate ligands and capable of forming rather stable chelates with almost all metals. A basic method of MCM synthesis is based on the incorporation of metal ions into a window of macrocycles completed by an exocyclic multiple bond [45 8]. Examples are 74-76. 

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