Jump to main content
Jump to site search


Polymeric nanoparticles based on CDs with photoreversible dual-color fluorescence modulation

Author affiliations

Abstract

A new kind of photoswitchable polymer nanoparticle is prepared using polymerizable alkenyl carbon dots (PCDs) and a spiropyran derivative, together with methyl methacrylate (MMA) as the monomer, and mediated by one-pot miniemulsion polymerization. Switching between two different wavelengths of emitted light can be realized by intraparticle fluorescence resonance energy transfer (FRET). The FRET efficiency could be easily controlled by the feed ratios of the two chromophores and the excitation wavelengths. UV and visible light can be applied to modulate the fluorescence emission of the prepared nanoparticles. Upon visible light irradiation, the nanoparticles emit blue-green fluorescence of the CDs while spiropyran is in its closed form (SP). UV irradiation of SP gives rise to an open-ring isomer (MC). An SP-to-MC photoisomerization triggers a CD-to-MC FRET, and the resulting nanoparticles emit red light. Their fluorescence could be reversibly switched between blue-green and red by using UV/vis light irradiation with excellent photoreversibility and high stability. In addition, the novel nanoparticles with reversibly photoswitchable fluorescence could be directly applied in rewritable fluorescence patterning and dual-color fluorescence imaging of living cells.

Graphical abstract: Polymeric nanoparticles based on CDs with photoreversible dual-color fluorescence modulation

Back to tab navigation

Supplementary files

Article information


Submitted
22 Aug 2020
Accepted
29 Sep 2020
First published
30 Sep 2020

J. Mater. Chem. C, 2020, Advance Article
Article type
Paper

Polymeric nanoparticles based on CDs with photoreversible dual-color fluorescence modulation

M. Deng, Y. Zhang, Y. Wang and S. Jiang, J. Mater. Chem. C, 2020, Advance Article , DOI: 10.1039/D0TC03993D

Social activity

Search articles by author

Spotlight

Advertisements