Facile preparation of fluorescent non-conjugated polymer films with tunable multicolor photoluminescence via layer-by-layer assembly. (14th December 2022)

• Record Type: Journal Article
• Authors: Wang, Xu; Sun, Huyun; Lu, Yingxi; Zhou, Xianfeng
• Is Part Of: Materials chemistry frontiers. Volume 7:Number 3(2023)
• Page Start: 442
• Page End: 450
• Publication Date: 2022-12-14
• Subjects: Materials science -- Periodicals; Chemistry -- Periodicals; 540
• DOI: 10.1039/d2qm00985d
• Languages: English
• ISSNs: 2052-1529

Abstract

Abstract : Fluorescent non-conjugated polymer films of poly(acrylic acid)/polyethylenimine are prepared by the layer-by-layer assembly, and these films exhibit tunable multicolor photoluminescence and sensitive response to metal ions. Abstract : Fluorescent non-conjugated polymeric films have remarkable advantages for ion sensing but have been less explored. Herein, fluorescent non-conjugated polymeric multilayers of poly(acrylic acid) (PAA)/polyethylenimine (PEI) with tunable multicolor photoluminescence are prepared using a simple and versatile layer-by-layer assembly (LbL) method. The PAA and PEI polymers do not have typical conjugated fluorescent units, but (PAA/PEI)* n multilayers display strong blue, green, and red fluorescence in the visible region. Interestingly, (PAA/PEI)* n multilayers exhibit different sensitivities to metal ions based on fluorescence quenching. This kind of LbL-assembled (PAA/PEI)* n multilayers provides a new perspective to prepare fluorescent non-conjugated polymeric films, and it avoids the complicated synthetic route and possesses good photo stability and excellent biocompatibility.