AE Arbuzov Institute of Organic and Physical Chemistry, Kazan, Russia.
Colloids Surf B Biointerfaces. 2011 Nov 1;88(1):490-6. doi: 10.1016/j.colsurfb.2011.07.039. Epub 2011 Jul 23.
The luminescent colloids have been synthesized through the layer-by-layer assembly of poly(sodium 4-styrenesulfonate) (PSS) and polyethyleneimine (PEI) onto the luminescent core. The latter has been obtained by the reprecipitation of complex Eu[(TTA)(3)1] (where TTA(-) and 1 are thenoyltrifluoroacetonate and 2-(5-chlorophenyl-2-hydroxy)-2-phenylethenyl-bis-(2-methoxyphenyl)phosphine oxide, respectively) from organic solvent to aqueous solution. The variation of Eu(III) complexes indicates the role of the complex core in the development of such core-shell colloids. Complex Eu[(TTA)(3)1] is most convenient precursor of Eu-doped luminescent nanocomposites. The fluorometric measurements at each step of the layer-by-layer polyelectrolyte assembly onto Eu[(TTA)(3)1] core, at various pHs and additives reveal the quenching of Eu-centered luminescence as a result of the interfacial interaction of the core and the dye. The AFM images and electrochemical behavior of PSS-(PEI-PSS)(n)-Eu[(TTA)(3)1] colloids deposited on the surface indicate the stability of the polyelectrolyte multilayer in the dried state.
通过将聚（对苯乙烯磺酸钠）（PSS）和聚乙烯亚胺（PEI）逐层组装到发光核上，合成了发光胶体。后者是通过将 Eu[(TTA)(3)1]复合物从有机溶剂中重新沉淀到水溶液中而得到的，其中 TTA(-)和 1 分别为三氟乙酰丙酮根和 2-(5-氯苯基-2-羟基)-2-苯乙烯基-双-(2-甲氧基苯基)膦氧化物。Eu(III)配合物的变化表明了配合物核在这种核壳胶体发展中的作用。Eu[(TTA)(3)1]复合物是Eu 掺杂发光纳米复合材料的最方便前体。在不同 pH 值和添加剂条件下，在将聚电解质逐层组装到 Eu[(TTA)(3)1]核上的每一步进行的荧光测量表明，由于核和染料的界面相互作用，Eu 中心发光被猝灭。沉积在表面上的 PSS-(PEI-PSS)(n)-Eu[(TTA)(3)1]胶体的 AFM 图像和电化学行为表明，干燥状态下多聚物多层的稳定性。
