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Noncovalent Bridged Bis(Coumarin‐24‐Crown‐8) Phosphorescent Supramolecular Switch.
- Source :
-
Advanced Optical Materials . Dec2022, Vol. 10 Issue 24, p1-8. 8p. - Publication Year :
- 2022
-
Abstract
- A multicolor room temperature phosphorescence (RTP) supramolecular photo‐switch encryption film is constructed by the coassembly of coumarin‐24‐crown‐8 (C24C8), diarylethene dicationic alkylammonium derivative (1), rhodamine B (RhB) and poly(vinyl alcohol) (PVA). Benefiting from the tightly binding of C24C8 and secondary alkylammonium ion, 1 formed noncovalent bridged bis(coumarin‐24‐crown‐8), which displayed photo‐switchable RTP with green afterglow (more than 5 s) after coassembly with PVA. Especially doping with RhB gave a photo‐switchable highly efficient phosphorescence‐harvesting system with multicolor through triplet‐to‐singlet Förster‐resonance energy transfer (TS‐FRET). The energy transfer efficiency and antenna effect of C24C8+RhB@PVA film reached 88.3% and 62.6 when the donor/acceptor ratio is 50:1, respectively. Therefore, diarylethene noncovalent bridged bis(coumarin‐24‐crown‐8) supramolecular assembly not only displays a multicolor photoluminescence‐switch, but also presents a phosphorescent photo‐switch with afterglow, which provides a simple and feasible way to construct smart RTP materials through host‐guest strategy. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 21951071
- Volume :
- 10
- Issue :
- 24
- Database :
- Academic Search Index
- Journal :
- Advanced Optical Materials
- Publication Type :
- Academic Journal
- Accession number :
- 160873186
- Full Text :
- https://doi.org/10.1002/adom.202201903