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Citation: SHAO Guang-Sheng, XUE Fu-Min, HAN Rong-Cheng, TANG Min-Xian, WANG Yuan. Synthesis and Characterization of Europium Complex Nanoparticles with Long-Wavelength Sensitized Luminescence[J]. Acta Physico-Chimica Sinica, ;2010, 26(07): 2031-2036. doi: 10.3866/PKU.WHXB20100715 shu

Synthesis and Characterization of Europium Complex Nanoparticles with Long-Wavelength Sensitized Luminescence

1.
Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China

Received Date: 2 February 2010
Available Online: 21 May 2010

Luminescent nanoparticles (dav=35 nm) of Eu(tta)3dpbt (dpbt= 2-(N,N-diethylanilin-4-yl)-4,6-bis (3,5-dimethylpyrazol-1-yl)-1,3,5-triazine, tta=thenoyltrifluoroacetonato) protected by bovine serum albumin (BSA) were prepared by a precipitation method. These particles disperse well in aqueous solutions to form stable and transparent colloidal solutions. The BSA-protected Eu(tta)3dpbt nanoparticles exhibit high photostability and excellent long-wavelength sensitized EuIII luminescence properties. The quantum yield of EuIII luminescence is 0.20 (λex=415 nm, 25 ℃), and the excitation band for the EuIII luminescence centers at 415 nm and extends to 470 nm. Upon two-photon excitation, the prepared nanoparticles emit pure-red light with a two-photon excitation action cross section of 2.4×10⁵ GM (λex=830 nm, 1 GM=10^-50 cm4·s·photo^-1·particle^-1). The prepared nanoparticles and the reported preparation method are promising for the development of luminescent bionanoprobes with excellent biocompatibility and luminescent properties.
- Luminescent nanoparticles,
- Europiumcomplex,
- Long-wavelength sensitized luminescence,
- Two-photon excitation,
- Luminescent bioprobe
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