Synthesis and properties of covalently linked thiaporphyrin–ferrocene conjugates

摘要: Abstract Four examples of ferrocene-thiaporphyrin conjugates in which the ferrocenyl group was covalently connected either directly at meso -position thiaporphyrin or to -phenyl via ethyne bridge were prepared by coupling bromo- iodo with α-ethynylferrocene under mild Pd(0) conditions. NMR, absorption and electrochemical studies indicated that units interact strongly bridged porphyrin-ferrocene but interaction is very weak phenyl conjugates. The steady state fluorescence yields are reduced 50% completely quenched partial complete quenching porphyrin these due electron transfer from ferrocene unit excited sub-unit. Oxidation ferrocenium ion an oxidizing agent resulted a recovery fluorescence.