Effect of anion coordination on electron transfer in double-linked zinc phthalocyanine–fullerene dyad

Harnessing the Synergistic and Complementary Properties of Fullerene and Transition-Metal Compounds for Nanomaterial Applications

“…177,178 This is attributed to energy-wasting charge recombination processes that can easily occur in these systems. The same trend is observed in C 60 −Zn(phthalocyanine) systems 212,213 and is also observed for the systems in which the metalloporphyrin unit is attached via bisfunctionalization of the fullerene cage (Figure 21). In this case, despite relatively long chain linkers, the metalloporphyrin unit is still located a short distance, several angstroms, from the fullerene cage, which is determined by the sterical restrictions imposed by the method of functionalization.…”

“…In systems where the two units are separated by short linkers, charge-separated states are either not observed as in the case of zinc azulenocyanine (Figure , compound 69 ) or are relatively short-lived with reported lifetimes in the 60–90 ps range (Figure , compounds 67 and 68 ). , This is attributed to energy-wasting charge recombination processes that can easily occur in these systems. The same trend is observed in C 60 –Zn­(phthalocyanine) systems , and is also observed for the systems in which the metalloporphyrin unit is attached via bisfunctionalization of the fullerene cage (Figure ). In this case, despite relatively long chain linkers, the metalloporphyrin unit is still located a short distance, several angstroms, from the fullerene cage, which is determined by the sterical restrictions imposed by the method of functionalization. ,, Thus, such zinc porphyrin complexes show formation of charge-separated species with lifetimes of 35–130 ps (Figure , compound 70 ) .…”