文摘
Monodispersed 尾-NaYF4 spindlelike mesocrystals have been successfully synthesized directly from Y(OH)xF3鈥?i>x as a precursor via a facile route. Detailed structural analyses demonstrated that the crystal framework structures of Y(OH)xF3鈥?i>x and 尾-NaYF4 were identical. A possible mechanism based on in situ ion-exchange transformation has been proposed. The monodispersed 尾-NaYF4 can be obtained through carefully controlled synthesis of the precursor. The photoluminescence properties of the 尾-NaYF4 doped with various rare earth ions (such as Yb/Er, Yb/Tm, Pr, Nd, Sm, Eu, Tb, Dy, and Ho) were investigated and multicolor emission was achieved.