Abstract
AbstractCore‐shell polymeric nanoparticles (NPs) containing photoswitchable spiropyrans (SP) and spirooxazines (SO) within the cores were fabricated. Fluorescence photoswitching studies revealed that the substituent groups on the photochromic SP/SO structures exerted significant influence on the fluorescence photoswitching behaviors of the as‐prepared polymeric NPs, such as the reversibly interchangeable fluorescence color and the photoswitching kinetics. The electron‐releasing and electron‐withdrawing abilities of the substituent groups are believed to play important roles in controlling the electron configuration of the photochromic component and therefore be responsible for the tunable dual‐color photoswitching performance.
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