Abstract
Stimuli-responsive fluorescence switching is of great importance to fluorescence modulation in a wide range of applications, such as sensors, bioimaging, and displays. We report here multi-stimuli-responsive fluorescence switching behavior of a multifunctional polymer bearing oligoaniline, azobenzene, and fluorene groups synthesized via copolycondensation polymerization. This fascinating fluorescence switching behavior is originated from controlled conformational (oligoaniline) and geometric (cis↔trans of azobenzene) changes within a polymer chain upon multiple external stimuli, including potential, pH value, redox species, UV/vis irradiation and heat. This work may provide additional avenue for tuning fluorescent properties of multifunctional polymers.
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