fluorescent organic nanoparticles
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2021 ◽  
Vol 133 (17) ◽  
Author(s):  
Junsheng Chen ◽  
S. M. Ali Fateminia ◽  
Laura Kacenauskaite ◽  
Nicolai Bærentsen ◽  
Stine Grønfeldt Stenspil ◽  
...  

2021 ◽  
Vol 60 (17) ◽  
Author(s):  
Junsheng Chen ◽  
S. M. Ali Fateminia ◽  
Laura Kacenauskaite ◽  
Nicolai Bærentsen ◽  
Stine Grønfeldt Stenspil ◽  
...  

Author(s):  
Junsheng Chen ◽  
S. M. Ali Fateminia ◽  
Laura Kacenauskaite ◽  
Nicolai Bærentsen ◽  
Stine Grønfeldt Stenspil ◽  
...  

2021 ◽  
Author(s):  
Junsheng Chen ◽  
S. M. Ali Fateminia ◽  
Laura Kacenauskaite ◽  
Nicolai Bærentsen ◽  
Stine Grønfeldt Stenspil ◽  
...  

2021 ◽  
Author(s):  
Junsheng Chen ◽  
S. M. Ali Fateminia ◽  
Laura Kacenauskaite ◽  
Nicolai Bærentsen ◽  
Stine Grønfeldt Stenspil ◽  
...  

Ultra-bright fluorescent nanoparticles hold great promise for demanding bioimaging applications. Recently, extremely bright molecular crystals of cationic fluorophores were obtained by hierarchical co-assembly with cyanostar anion-receptor complexes of associated counterions. These small-molecule ionic isolation lattices (SMILES) ensure spatial and electronic isolation to prohibit dye aggregation quenching. We report a simple, one-step supramolecular approach to formulate SMILES materials into nanoparticles. Rhodamine-based SMILES nanoparticles stabilized by glycol amphiphiles show high fluorescence quantum yield (30%) and brightness per volume (5000 M<sup>–1</sup> cm<sup>–1</sup> / nm<sup>3</sup>) with 400 dyes packed into 16-nm particles, corresponding to an absorption coefficient of 4 × 10<sup>7</sup> M<sup>–1 </sup>cm<sup>–1</sup>. UV excitation of the cyanostar component leads to highest brightness (>6000 M<sup>–1</sup> cm<sup>–1</sup> / nm<sup>3</sup>) by energy transfer to rhodamine emitters. Coated nanoparticles stain cells and are thus promising for bioimaging.


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