Journal
CHEMICAL ENGINEERING JOURNAL
Volume 432, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.134411
Keywords
Room-temperature phosphorescence; Photoresponsive; Doped polymer films; Naphthalene diimide; Dynamic emission color
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Funding
- National Natural Science Foundation of China [21875159, 21922409]
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A new photoresponsive luminescent material with a dynamic wide-range emission color was successfully developed by dispersing NDI-COOH into a polymer matrix. A new mechanism involving twice energy transfer between NDI and NDI radical anions for photo-enhanced RTP luminescence was presented.
Smart materials with dynamic luminescence-color are potentially useful for sensors, displays and data storage devices. Herein a new photoresponsive luminescent material with a dynamic wide-range emission color was successfully developed through individually dispersing naphthalene diimide (NDI) possessing aliphatic carboxylic acid substitution on the diimide nitrogen atoms (NDI-COOH) into polymer matrix. Experiments and mechanism studies demonstrated that it was the photo-generated stable NDI radical anions that led to the unique photoresponsive dynamic emission color. Notably, a new mechanism involving twice energy transfer between NDI and NDI radical anions for photo-enhanced room-temperature phosphorescence (RTP) luminescence was presented. The present dynamic reversible emission approach, not only outlines a principle for the design of photo-induced radical anions with tunable luminescence, but also expands the scope of encryption and decryption of confidential information.
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