biostudies-literatureYen CYProfound Material Technology Co., Ltd., TaiwanNational Science and Technology Council26223https://www.ebi.ac.uk/biostudies/studies/S-EPMC11528010biostudies-literatureUnknown14(1)Although many dyes have been introduced into cellulose, whether bound to its backbone or within a cellulose matrix, few studies have determined whether the backbone statically or dynamically quenches the photoluminescence of the dye. To advance cellulosic fluorescent films, the influence of the cellulose backbone on photoluminescence must be understood. We determined the fluorescence properties of fluorescein isothiocyanate (FITC) and fluorescein-labeled cellulose (FLC) in water and alcohol, including their quantum yields [Formula: see text], lifetimes [Formula: see text], and rates of radiative [Formula: see text] and nonradiative [Formula: see text] decay. Dissolved FLC had a ~ 30× lower [Formula: see text] than FITC, suggesting that incorporating FITC into the cellulose backbone remarkaScientific reportsCharacterizing the photoluminescence of fluorescein-labeled cellulose in aqueous and alcohol solutions: influence of the cellulose backbone.PMC11528010111-2113-M-A49-015NTHU no. 112A0227P1111-2221-E-007-023Awasthi KRana SOh-E MYen CYOhta NfalseCharacterizing the photoluminescence of fluorescein-labeled cellulose in aqueous and alcohol solutions: influence of the cellulose backbone.Although many dyes have been introduced into cellulose, whether bound to its backbone or within a cellulose matrix, few studies have determined whether the backbone statically or dynamically quenches the photoluminescence of the dye. To advance cellulosic fluorescent films, the influence of the cellulose backbone on photoluminescence must be understood. We determined the fluorescence properties of fluorescein isothiocyanate (FITC) and fluorescein-labeled cellulose (FLC) in water and alcohol, including their quantum yields [Formula: see text], lifetimes [Formula: see text], and rates of radiative [Formula: see text] and nonradiative [Formula: see text] decay. Dissolved FLC had a ~ 30× lower [Formula: see text] than FITC, suggesting that incorporating FITC into the cellulose backbone remarka2024-01-01T00:00:00Z2024 Oct2025-04-04T00:06:27.525Z2025-04-04T00:06:27.525ZS-EPMC115280103948233110.1038/s41598-024-72773-6