Moreover, PL of PLVP-3 in the mixed solvents of DMF/H2O with different H2O fractions at a concentration of 0.1 mg/mL is examined. It is found that, with the increasing of H2O fractions, the PL intensity gradually decreased (Figure ). These results indicate that PLVP possesses an ACQ property. This is different from most NCLPs reported previously, if not all, that usually possess AIE feature. Also, it's noteworthy that the emission wavelength of PVLP-3 in the dilute solutions (0.001-1.0 mg/ml) is independent with the concentration (Figure ), which implies the emission of PLVP is determined by the intra-chain interactions, rather than the inter-chain interactions (see more discussion below).