Supramolecular Nanodevice Based on Helical Encapsulation of Photo/Electroactive Oligomers

Oligophenylenevinylene (OPV)‐based A‐D‐A chain chromophores were synthesized by symmetrically linking electron‐ or energy‐acceptor units through an alkyl spacer. Phto‐induced thru‐space electron/energy‐transfer (eT/ET) was investigated in the presence and absence of amylose encapsulation with respect to the spacer length (D‐A distance) and acceptor strength. Fluorescence quenching of the D‐A chromophores suggests that with the helical encapsulation, eT/ET have a discrete D‐A distance dependence while the free chromophores have mixed contributions, some from eT but largely from self‐quenching due to aggregation and/or solvent deactivation.