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. 2023 May 29;6:0152. doi: 10.34133/research.0152

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Copyright © 2023 Dingbowen Wang et al.

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Fig. 1. — Demonstration of intrinsic band-shifting behavior (excitation-wavelength-dependent emission) of CA-based fluorophores and polymers. (A) Emissive mechanisms and structural comparison of DPRs and TPAs. (B) Emission spectra of CA-Ala in different solvents at various wavelengths of excitation, showing solvent polarity-dependent intrinsic band-shifting behavior. (C) Optical images of excitation-wavelength-dependent emission of CA-Ala solution. From left to right side, the excitation wavelength increases. Adapted with permission from [15]. Copyright (2017) Elsevier. (D) Excitation-wavelength-dependent emission spectra of BPLP-Ala and BPLP-Arg films. PL, photoluminescent; a.u., arbitrary units.