Design and synthesis of charged porphyrin dimers for polyoxometalate recognition

A series of porphyrin dimers have been prepared and characterized in order to form inclusion complexes with Lindqvist-type polyoxometallates. The synthesis of the porphyrin dimer has been optimized and can serve general purposes. The formation of inclusion complexes has been monitored using spectroscopic methods and moderate affinities with log K-assoc varying from 2.6 to 4.2 have been determined and the parameters governing the formation of the complexes have been examined.