Figure 4. A) PL spectra of 0.1 M PMTC and 0.1 M DBU in DMF at the different mixing time (λ ex = 400 nm and 460 nm); B) PL spectra of 0.1 M PC and 0.1 M DBU in DMF at the different mixing time λ ex = 380 nm and 440 nm); C) PL spectra of 0.1 M PVAc and 0.1 M DBU in acetone at the different mixing time (λ ex = 380 nm); 1H NMR spectrum of (D) PMTC (E) PC (F) PVAc and DBU (molar ratio 1:1) in CDCl3 at the different mixing time.