On-off switch of charge-separated states of pyridine-vinylene-linked porphyrin-C₆₀ conjugates detected by EPR.

ABSTRACT: The design, synthesis, and electronic properties of a new series of D-π-A conjugates consisting of free base (H₂P) and zinc porphyrins (ZnP) as electron donors and a fullerene (C₆₀) as electron acceptor, in which the two electroactive entities are covalently linked through pyridine-vinylene spacers of different lengths, are described. Electronic interactions in the ground state were characterized by electrochemical and absorption measurements, which were further supported with theoretical calculations. Most importantly, charge-transfer bands were observed in the absorption spectra, indicating a strong push-pull behavior. In the excited states, electronic interactions were detected by selective photoexcitation under steady-state conditions, by time-resolv

SUBMITTER: Kirner SV 

PROVIDER: S-EPMC5669314 | biostudies-literature | 2015 Oct

REPOSITORIES: biostudies-literature