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Two different fullerene-subphthalocyanine-ferrocene conjugates are prepared and electronic absorption and cyclic voltammetry measurements have shown that the [pi]-[pi] distance has a major impact on the ground-state electronic interactions between the subphthalocyanine and the [C.sub.60]. The synthesis and analysis of the ground- and excited-state electronic interactions occurring in the conjugates, as well as their reference [C.sub.60]-subphthalocyanine and subphthalocyanine-ferrocene dyads, is described.

Oligo(p-phenylene-vinylene) oligomers capped with a guanosine or a guanine moiety are prepared via a palladium-catalyzed cross-coupling reaction and their self-assembly is studied in solution, solid state and on surfaces. The studies have shown that these [pi]-conjugated molecules self-associate in a mixture of hydrogen-bonded oligomers, among which the G-quartet structure is predominant if the steric hindrance around the guanine base is important.

The synthesis and the electrochemical and photophysical properties of a series of three isomeric Pc-AQ-Pc triads, covalently linked by ethenyl spaces are presented. The effect of the aggregation status of the Pc-AQ-Pc triads as a function of molecular topology and solvent environment, on their redox and photoinduced charge-separation properties is demonstrated.

Studies on the photoinduced electron-accepting ability of Subphthalocyanines in a series of dyad having ferrocene donor unit covalently attached through the axial position of the macrocycle are presented. It is shown that charge separation progresses from singlet excited state to a stabilized radical ion pair whose recombination lifetime is among the longest reported for a dyad system.

Subphthalocyanines are light harvesting and/or donor units for photosynthetic systems. The study conducted on them, proves that they are synthetically and electronically versatile molecular units used for the construction of multicomponent photoactive systems.