Communication
ChemComm
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fabricated by encapsulating the pattern into ammonium hexa-
fluorophosphate conductive media and sandwiching between two
indium-tin oxide (ITO) anodes. When a positive voltage is applied
to the device, the pattern shows evident emission color change in a
few seconds (Fig. 4c).
In summary, we have successfully constructed new electro-
fluorochromic supramolecular polymers (EFSPs) based on 1,8-
dioxapyrene units through the coordination of terpyridine
ligands with Eu3+ ions. By controllably adjusting the ratio of
monomers M1 and M2, the resulting EFSPs exhibit multicolor
emission features from blue to red, passing through white.
Thanks to the synergistic participation of 1,8-dioxapyrene and
terpyridine–Eu3+ complexes, the emission signals of the EFSPs
can be fine-tuned by electrical stimuli, which possess remark-
able electrofluorochromic properties. Finally, the EFSPs feature
distinct emission colors upon voltage or pH treatment, which
can be employed for fluorescent anti-counterfeiting applications
with high security. Hence, EFSPs with multicolor tunable capacity
will be promising candidates for application in information
security protection technology.
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We would like to acknowledge the support of the National
Science Foundation of China (No. 21674086), the Natural Science
Basic Research Plan in Shaanxi Province of China (2018JZ2003), and
the Fundamental Research Funds for the Central Universities
(3102019PY003 and G2019KY05111). We also thank the Analytical
& Testing Center of Northwestern Polytechnical University for
electron microscope tests.
Conflicts of interest
14 (a) J. Li, H. K. Bisoyi, J. Tian, J. Guo and Q. Li, Adv. Mater., 2019,
31, 1807751; (b) X. Jin, D. Yang, Y. Jiang, P. Duan and M. Liu, Chem.
There are no conflicts to declare.
´
´
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