Porphyrin–Hexaphenylbenzene Conjugates via Mixed Cyclotrimerization Reactions

Mixed cyclotrimerization reactions
of diarylacetylenes (tolans)
were applied to generate a library of multiple porphyrin–hexaphenylbenzene
(HPB) architectures. Successful reactions, which could be influenced
by the ratio of tolan starting materials, were conducted using dicobaltoctacarbonyl
as a catalyst. Separation of the reaction products was performed by
chromatographic and crystallization techniques. The physical properties
were investigated with respect to the number of porphyrins per HPB
and their substitution pattern.