Two-expanded acceptor-donor-acceptor molecules DIPT-IC and DIPT-ICF have been designed and synthesized. The synthetic routes were shown in scheme S1. Compound 1 was synthesized according to literature method . Suzuki coupling between compound 1 and methyl 2- The optical properties of DIPT-IC, DIPT-ICF, and their nanoparticles (NPs) were investigated by UV-vis and photoluminescence (PL) spectroscopy (Fig. ). The NPs of DIPT-IC and DIPT-ICF were fabricated by nanoprecipitation method using the FDA-approved surfactant F-127, and the sizes of which were analyzed by dynamic light scattering (DLS) and transmission electron microscopy (TEM) (Fig. , 1B and S1). Both DIPT-IC and DIPT-ICF showed strong absorption in tetrahydrofuran solution with maximal absorption peaks of 746 nm and 818 nm, respectively.