Phototunable Full‐Color Emission of Cellulose‐Based Dynamic Fluorescent Materials

• DOI: 10.1002/adfm.201703548
• Publication Date: 2017-12-27T07:28:40Z
• Authors: Weiguo Tian; Jinming Zhang; Jian Yu; Jin Wu; Jun Zhang; Jiasong He; Fosong Wang
• Keywords: Structural Coloration; Spiropyran

Abstract An iridescent chameleon‐like material that can change its colors under different circumstances is always desired in color‐on‐demand applications. Herein, a strategy based on trichromacy and the dynamically tunable fluorescence resonance energy transfer (FRET) process to design prepare these fluorescent materials proposed. A set of trichromic (red, green, blue), solid are synthesized by covalently attaching spiropyran, fluorescein, pyrene onto cellulose chains independently. After simply mixing them together, full range color realized. The nature dynamic FRET between donors (green blue) acceptors (red) which efficiency be finely tuned irradiation. Ultimately, reversible nonlinear regulation properties, including intensity, achieved timescale recognizable naked eye. Benefited excellent processability inherited from derivatives, as‐prepared feasibly transformed into forms. Particularly, ink with complicated input–output dependence suggests more than proof‐of‐concept; indeed, it unique method information encryption, security printing, anticounterfeiting.