SELF-ASSEMBLY VIA 'TWO-POINT' BINDING OF A ZINC PORPHYRIN DIMER TO A BIS PYRIDINE FUNCTIONALIZED FULLERENE; SINGLET EMISSION STUDIES

摘要

A stable, self-assembled supramolecular triad was assembled via a 'two-point' axial ligand coordination approach using a covalently linked zinc porphyrin dimer and fulleropyrrolidine functionalized with two pyridine entities. The geometry and electronic structure of the triad was established from spectroscopic and ab initio B3LYP/3-21G(*) calculations. Preliminary steady-state and time-resolved fluorescence studies revealed efficient quenching suggesting the occurrence of light induced electron transfer from singlet excited zinc porphyrin dimer to the axially bound fullerene moiety.