Abstract
The synergy of panchromatic absorption throughout most of the visible range of the solar spectrum and intramolecular singlet fission (i-SF) has been realized in a series of conjugates featuring different light harvesting subphthalocyanines (SubPc) / porphyrazines (Pz) and an energy accepting pentacene dimer (Pnc2). At the focal point was a modular approach, which was based on decorating the SubPc / Pz core with different peripheral substituents to tailor and fine-tune their optical properties. Transient absorption measurements assisted in corroborating that the SubPcs / Pzs act as energy-transfer antennas by means of unidirectional and quantitative intramolecular Förster resonance energy transfer (FRET) to the Pnc2, where an i-SF affords triplet quantum yields reaching unity.
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