Fig. 1: Conceptional strategy for designing and constructing D-A CPP nanohoops with dual-emission states.

a The D-A CPP nanohoops exhibiting a single-emission in previous work (up) and a tunable dual-emission from the locally excited (LE) and charge transfer (CT) states in this work (bottom). b An effective post-synthesis strategy based on Diels-Alder reaction to synthesize quinone-based D-A [n]CPPs (Nq[10]CPP, Aq[10]CPP and Tq[10]CPP) and the fluorescence emission spectra in CHCl3 in this work. Nq Naphthoquinone, Aq Anthraquinone, Tq Tetracenequinone.