Synthesis of Multiporphyrin Containing Hyperbranched Polymers

This paper describes the facile synthesis of a hyperbranched poly(aryl ester) that possesses a number of porphyrin units within its globular structure. The simple procedure utilizes commercially available starting materials which after fractionation generate a series of polymers with molecular weights between 4500 and 30 000 Da. The number of porphyrins increased with molecular weight with the largest polymer containing ∼6 porphyrins. Further analysis revealed a linear relationship between the number of incorporated porphyrins and molecular weight.

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