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Colloidal Synthesis of Luminescent Rhabdophane LaPO 4 :Ln 3+ · x H 2 O (Ln = Ce, Tb, Eu; x ≈ 0.7) Nanocrystals

2004; American Chemical Society; Volume: 16; Issue: 19 Linguagem: Inglês

10.1021/cm049323a

1520-5002

Valérie Buissette, Mélanie Moreau, Thierry Gacoin, Jean‐Pierre Boilot, Jean‐Yves Chane‐Ching, Thierry Le Mercier,

Nuclear materials and radiation effects

Lanthanide phosphate nanocrystals exhibiting the rhabdophane-type structure and mean particle sizes below 10 nm are synthesized by hydrolysis of an aqueous mixture of sodium tripolyphosphate (Na5P3O10) and lanthanide salts. 31P NMR studies show that polyphosphate groups act both as a source of orthophosphate and as complexing agents to, respectively, crystallize and stabilize LnPO4·xH2O (x ≈ 0.7) nanoparticles. In the ternary system (Ln = La, Ce, and Tb), polyphosphate-capped particles form well-dispersed and highly luminescent aqueous colloids which are promising for applications in light-emitting devices.