Sensitized Luminescence of Trivalent Europium by Three

Sensitized Luminescence of Trivalent Europium by Three-Dimensionally Arranged Anatase Nanocrystals in Mesostructured Titania Thin Films

Karen L. Frindell, Michael H. Bartl, Alois Popitsch, and Galen D. Stucky*

Angew. Chem. Int. Ed. 2002, 41, No. 6

图中由一步sol-gel法合成的介孔的钛具有墙壁式结构，墙壁由被无定型的钛盐包围的锐钛矿纳米晶组成。可以容包多至8%的铕离子。纳米晶在其带隙内受激，导致发生向Eu³⁺的非辐射能量转移，产生亮红色的荧光。由于在Eu³⁺中的f-f跃迁是部分禁阻的，锐钛矿纳米晶可用作传感器。由于Eu³⁺位于锐钛矿纳米晶和无定型的钛盐的相界面，Eu³⁺荧光发射的浓度淬灭被防止。