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394
determined). Energy transfer from the OPV to the fullerene resulted
in the quenching of the OPV luminescence.
In the group of Li, tolyl–terpyridine has been converted to an
azide. 157 The cycloaddition reaction of this intermediate to the
fullerene resulted in a ring-opening of the fullerene cage (1.6-azabridged,
Scheme 64). Subsequent complexation with tolyl–
terpyridine–ruthenium led to the fullerene–ruthenium complex
dyad.
In the group of Schubert, even a tetra-fullerene adduct was
successfully prepared. A tetra-terpyridine, based on pentaerythrol,
Chem. Soc. Rev., 2004, 33, 373–399
Scheme 64 Coupling of an azide-functionalized terpyridine to a fullerene. 157
Scheme 65 Star-shaped tetrafullerene complex array. 158
was reacted with a terpyridine-containing fullerene derivative
(Scheme 65). The result is a star-shaped complex with buckyballs
in the periphery. 158
Complexes containing biochemical groups
An interesting approach is the combination of terpyridine-complex
chromophores with biomolecules, which could act as luminescent
labels for biological processes. Furthermore, the ability of electron