Europium-doped calcium pyrophosphates:: Allotropic forms and photo luminescent properties
Europium-doped calcium pyrophosphates:: Allotropic forms and photo luminescent properties
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DOI：
10.1016/j.jssc.2005.05.023
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发表时间：
2005-07-01
影响因子：
3.3
通讯作者：
Lebugle, A
中科院分区：
文献类型：
--
作者：
Doat, A;Pellé, F;Lebugle, A
在寻找新的发光生物探针的过程中，我们合成了掺杂铕的焦磷酸钙，Eu/（Eu + Ca）原子比高达2%。它们是通过钙和铕盐与磷酸盐的混合物共沉淀制备的，在空气中加热到900 ℃后，两相共存，鉴定出其为β焦磷酸钙形式和EuPO 4。在空气中加热到1250 ℃左右，在β- x转变过程中，铕离子取代了x中的钙离子.焦磷酸钙结构，如光谱研究所示。在样品中观察到两种价态（二价和三价）的铕离子。该化合物在氧化性气氛中也能被部分还原。掺杂浓度为0.5%的化合物可作为灵敏的生物探针。取决于激发波长。发光发生在红色或蓝色区域，这将其与由活细胞中的其它染料或细胞器产生的寄生信号区分开。(c)2005年爱思唯尔公司All rights reserved.
in a search for new luminescent biological probes, we synthesized calcium pyrophosphates doped with europium up to an atomic Eu/(Eu + Ca) ratio of 2%. They were prepared by coprecipitating a mixture of calcium and europium salts with phosphate, After heating at 900 degrees C in air, two phases coexisted, identified its the beta calcium pyrophosphate form and EuPO4. Heating near 1250 degrees C ill air, during the beta - x transformation, europium ions substitute for Calcium ions ill the x. calcium pyrophosphate structure as, demonstrated by the spectroscopic study. Europium ions with both valence states (divalent and trivalent) were observed in the samples. Following the synthesis procedure, partial reduction of Eu3+ took place even in an oxidizing atmosphere, The 0.5%-doped compound could serve as a sensitive probe in biological applications. Depending oil the excitation wavelength. the luminescence occurs either in the red or in the blue regions, which discriminates it from parasitic signals arising from other dyes or organelles in live cells. (c) 2005 Elsevier Inc. All rights reserved.