Axially coordinated oligomer of ferrocene-based porphyrin with fullerene C60 for spectroscopic and photocurrent studies

Axially coordinated oligomer of ferrocene based Sn(IV) porphyrin with C-60 was synthesized and characterized by the common spectral method and thermogravimetric analysis. The oligomer aggregated into irregular block structure in solid state from observation of scanning electron microscope. According to UV-visible absorption spectra, there was almost no electronic interaction in the ground state among the photoactive components in the oligomer. However, the nanosecond transient absorption spectra and steady-state fluorescence spectra experiments indicated that efficient photoinduced electron transfer among C-60, excited Sn(IV) porphyrin, and ferrocene had occurred, which resulted in forming the final charge-separated state with long time of 14 mu s in benzonitrile. In addition, a prompt and stable photocurrent was generated in the photovoltaic devices upon irradiation by monochromatic light of lambda(ex) = 429 nm.

Automated summary

An axially coordinated oligomer of ferrocene-based Sn(IV) porphyrin with C-60 was synthesized and characterized, showing no electronic interaction in the ground state among the photoactive components. However, efficient photoinduced electron transfer occurred under specific conditions, resulting in the formation of a stable charge-separated state. In addition, a prompt and stable photocurrent was generated in photovoltaic devices under irradiation with monochromatic light.