长波敏化发光铕配合物纳米粒子的制备与表征.pdf

物理化学学报(Wuli Huaxue Xuebao)
Acta Phys. -Chim. Sin., 2010, 26(7)：2031-2036July ngineering, Peking University, Beijing 100871, P. R. China)
Abstract： 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-
III III
wavelength sensitized Eu luminescence properties. The quantum yield of Eu luminescence is (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 ×105
-50 4 -1 -1
GM (λex=830 nm, 1 GM=10 cm·s·photo ·particle ). The prepared nanoparticles and the reported preparation
method are promising for the development of luminescent bionanoprobes with excellent bio