scholarly journals Uniform Spheres of α-NaYF4:RE3+ (RE=Eu, Tb, Ce, Er, and Tm): Template-Free Synthesis, Multi-Color Photoluminescence, and Their Application in Cellular Imaging

Crystals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 119
Author(s):  
Xiaofeng Fan ◽  
Laiqin Gu ◽  
Yiling Hu ◽  
Qi Zhu

Uniformly dispersed luminescent probes with a high brightness and high resolution are desired in bio imaging fields. Here, ~100 nm sized and well-dispersed spheres of RE3+ doped α-NaYF4 (rare earth (RE) = Eu, Tb, Ce, Er, and Tm) have been facile synthesized through hydrothermal processing in the absence of a template, followed by a proper annealing. The processing window of the cubic structured spheres is wide, because the hydrothermal products are independent of the processing conditions, including reaction time and temperature. The original morphology and crystal structure can be well retained with a calcination temperature up to 600 °C. However, calcination gives rise to a reduction of particle sizes, as a result of the crystallite growth and densification. Under ultraviolet radiation, α-NaYF4:RE3+ spheres show characteristic f-f emissions of RE3+ (RE = Eu, Tb, Ce, Er, and Tm), and exhibit orange red, green, ultraviolet (UV), blue green, and blue emissions, respectively. Mainly because of the near-infrared emission at ~697 nm (5D0→7F4 transitions of Eu3+), the successful imaging of macrophages was achieved by NH2-NaYF4:Eu3+ probes, indicating their excellent imaging capacity for cells in vitro.

Carbon ◽  
2021 ◽  
Vol 182 ◽  
pp. 860-861
Author(s):  
Li-ping Li ◽  
Xiao-feng Ren ◽  
Pei-rong Bai ◽  
Yan Liu ◽  
Wei-yue Xu ◽  
...  

2021 ◽  
Vol 36 (3) ◽  
pp. 632-638
Author(s):  
Li-ping Li ◽  
Xiao-feng Ren ◽  
Pei-rong Bai ◽  
Yan Liu ◽  
Wei-yue Xu ◽  
...  

2020 ◽  
Author(s):  
Sylvestre P. J. T. Bachollet ◽  
Cyril Addi ◽  
Jean-Maurice Mallet ◽  
Blaise Dumat

A series of red-emitting and near-infrared fluorogenic protein probes based on push-pull molecular rotor structures was developed. After characterization of their optical properties using Bovine Serum Albumin as a model protein, they were conjugated to a halogenoalkane ligand in order to target the protein self-labeling tag HaloTag. The interaction with HaloTag was investigated in vitro and then the most promising probes were applied to live-cell imaging in wash-free conditions using fluorogenic and chemogenetic targeting of HaloTag fusion proteins.<br>


2018 ◽  
Vol 54 (67) ◽  
pp. 9364-9367 ◽  
Author(s):  
Hannah R. Shanks ◽  
Mingning Zhu ◽  
Amir H. Milani ◽  
James Turton ◽  
Sarah Haigh ◽  
...  

Core–shell–shell particles with incorporated near-infrared polymer dots give high brightness, increased colloidal stability, and non-radiative resonance energy transfer.


2017 ◽  
Vol 5 (5) ◽  
pp. 1224-1230 ◽  
Author(s):  
Chun-Lin Sun ◽  
Shao-Kai Lv ◽  
Yan-Ping Liu ◽  
Qing Liao ◽  
Hao-Li Zhang ◽  
...  

Assisted by a new strategy of non-conjugated modifications, we designed a benzoindolic squaraine dye with δ > 12 000 GM and high near-infrared emission, which is ideal for in vitro bioimaging applications.


2020 ◽  
Author(s):  
Sylvestre P. J. T. Bachollet ◽  
Cyril Addi ◽  
Jean-Maurice Mallet ◽  
Blaise Dumat

A series of red-emitting and near-infrared fluorogenic protein probes based on push-pull molecular rotor structures was developed. After characterization of their optical properties using Bovine Serum Albumin as a model protein, they were conjugated to a halogenoalkane ligand in order to target the protein self-labeling tag HaloTag. The interaction with HaloTag was investigated in vitro and then the most promising probes were applied to live-cell imaging in wash-free conditions using fluorogenic and chemogenetic targeting of HaloTag fusion proteins.<br>


2019 ◽  
Vol 141 (50) ◽  
pp. 19570-19574 ◽  
Author(s):  
Gary J. Richards ◽  
Aël Cador ◽  
Shinji Yamada ◽  
Anna Middleton ◽  
Whitney A. Webre ◽  
...  

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