Clustering-triggered emission of poly(vinyl) alcohol

Numerous polymers without traditional chromophores exhibit novel fluorescence properties and have wide application prospects. This concept is referred to as non-traditional intrinsic luminescence (NTIL). Most polymers show aggregation-induced emission (AIE) characteristics. Non-conjugated macromolecule poly(vinyl) alcohol (PVA) shows nearly no emission in dilute solutions but shows enhanced emission when in concentrated solutions, solid powders, and films. In this work, we report the unique intrinsic emission of PVA and the clustering-triggered emission (CTE) mechanism is used to explain the emission. Moreover, the impact of different specifications on emission was explored. Because of its excellent biocompatibility and good ability to form films and hydrogels, PVA has potential practical application prospects.