Abstract
Directly 2,12- and 2,8-linked Zn(II) porphyrin oligomers were prepared from 2,12- and 2,8-diborylated Zn(II) porphyrin by a cross platinum-induced coupling with a 2-borylated Zn(II) porphyrin end unit followed by a triphenylphosphine (PPh3 )-mediated reductive elimination. Comparative studies on the steady-state absorption and fluorescence spectra and the fluorescence lifetimes led to a conclusion that the exciton in the S1 state is delocalized over approximately four and two Zn(II) porphyrin units for 2,12- and 2,8-linked Zn(II) porphyrin arrays, respectively.
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