Figure 1

The structure of designed small organic NFA molecules A1–A5; the topmost structure represents core and donor units with X as acceptor unit (A1–A4), the lowest A5 has core, donor and acceptor units.

The structure of designed small organic NFA molecules A1–A5; the topmost structure represents core and donor units with X as acceptor unit (A1–A4), the lowest A5 has core, donor and acceptor units.