2008

LuminescenceD 6540 Multicolor Tuning of (Ln, P)-Doped YVO4 Nanoparticles by Single-Wavelength

Excitation. — Spherical (Y0.95Eu0.05)VO4 and rod-like Y(P0.75V0.25)O4 nanoparticles are synthesized from solutions of Na3VO4, Na3PO4, YCl3, and polyvinylpyrrolidone (auto-clave, 180 °C, 2 h) and characterized by XRD, TEM, and excitation and emission spec-troscopy. Y(P0.75V0.25)O4 nanoparticles doped with increasing concentrations of Eu3+, Dy3+, and Sm3+ ions exhibit decreasing emission intensity ratios of [VO4]

3- to the Ln dopants. This allows for selective fine-tuning of the emission color from deep blue to green, red, and yellow. Moreover, solid (Ln, P)-doped YVO4 nanoparticles show the same emission colors as in solution, providing evidence for their high stability toward bleaching. Once coupled to biological molecules, the approach should provide a rapid and reliable route to multiplex detection of target biological molecules or materials. — (WANG, F.; XUE, X.; LIU*, X.; Angew. Chem., Int. Ed. 47 (2008) 5, 906-909; Dep. Chem., Natl. Univ. Singapore, Singapore 117543, Singapore; Eng.) — W. Pewestorf

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