Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 116, Issue 11, Pages 4816-4821Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1821991116
Keywords
photoexcitation; conformational regulation; aggregation-induced phosphorescence; self-recoverable; luminescent probe
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Funding
- Natural Science Foundation of Shanghai [17ZR1402400]
- National Key Research and Development Program of China [2017YFA0207700]
- Thousand Young Talents Plan of China
- Hundred Talents Plan of Zhejiang University
- National Natural Science Foundation of China [21703202, 21873080]
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Chemical systems with external control capability and self-recoverability are promising since they can avoid additional chemical or energy imposition during the working process. However, it remains challenging to employ such a nonequilibrium method for the engineering of optoelectronic function and for visualization. Here, we report a functional molecule that can undergo intense conformational regulation upon photoexcitation. It enables a dynamical change in hydrophobicity and a follow-up molecular aggregation in aqueous media, accordingly leading to an aggregation-induced phosphorescence (AIP) behavior. This successive performance is self-recoverable, allowing a rapid (second-scale cycle) and long-standing (> 10(3) cycles) flicker ability under rhythmical control of the AIP. Compared with traditional bidirectional manipulations, such monodirectional photocontrol with spontaneous reset profoundly enhances the operability while mostly avoiding possible side reactions and fatigue accumulation. Furthermore, this material can serve as a type of luminescent probe for dynamically strengthening visualization in bioimaging.
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