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Room‐Temperature Phosphorescence and Reversible White Light Switch Based on a Cyclodextrin Polypseudorotaxane Xerogel
Author(s) -
Li JingJing,
Zhang HengYi,
Zhang Yi,
Zhou WeiLei,
Liu Yu
Publication year - 2019
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201900589
Subject(s) - phosphorescence , phosphor , materials science , photoluminescence , fluorescence , photochemistry , luminescence , polymer , supramolecular chemistry , optoelectronics , optics , chemistry , molecule , composite material , organic chemistry , physics
The development of metal‐free room‐temperature phosphorescent (RTP) and white‐light‐emitting supramolecular materials is significant for artificial soft materials. Herein, a polypseudorotaxane xerogel is fabricated by threading a linear brominated aromatic aldehyde polymer into α‐cyclodextrin cavities. The xerogel can be excited to produce not only RTP signals based on the xerogel network structure's strong restriction of phosphor vibrations and suppression of the nonradiative relaxation process but also white‐light emission at room temperature. Notably, the polypseudorotaxane system possesses excellent fluorescence–phosphorescence dual emission properties and is capable of reversible photoluminescence switching between blue fluorescence emission and white‐light emission in the presence and absence of water.