anti-[2.2](1,4)Phthalocyaninophane: Spectroscopic Evidence for Transannular Interaction in the Excited States

摘要

We have demonstrated the design and synthesis of a novel bisphthalocyanine system (1Zn and 1Cu) that exhibited significantly split and red-shifted absorption in the near-IR region. It was found that 1Zn maintained the fluorescence properties of Pcs. The MO model analysis provides a clear-cut picture for the nature of the electronic communication between the two Pc chromophores, which could offer a new approach for understanding transannular interactions of cyclophanes. In addition, since the phthalocyaninophanes can mimic the slipped-stack arrangement with significant interchromophore coupling, the present system has potential application as a novel model of the special pair and subunits in photosynthetic systems.