Luminescence of LaF3:Ln(3+) Nanocrystal Dispersions in Ionic Liquids

作者：Lunstroot Kyra; Baeten Linny; Nockemann Peter; Martens Johan; Verlooy Pieter; Ye Xingpu; Gorller Walrand Christiane; Binnemans Koen^*; Driesen Kris

来源：Journal of Physical Chemistry C, 2009, 113(31): 13532-13538.

DOI：10.1021/jp9015118

Ionic liquids were used as solvents for dispersing luminescent lanthanide-doped LaF3:Ln(3+) nanocrystals (Ln(3+) = Eu3+ and Nd3+). To increase the solubility of the inorganic nanoparticles in the ionic liquids, the nanocrystals were prepared with different stabilizing ligands, i.e., citrate, N,N,N-trimethylglycine (betaine), and lauryldimethylglycine (lauryl betaine). LaF3:5%Ln(3+) :betaine could successfully be dispersed in 1-butyl-1-methylpyrrolidinium bis(tiifluoromethylsulfonyl)imide [C(4)mpyr][Tf2N], 1-butyl-1-methylpyrrolidinium trifluoromethanesulfonate [C(4)mpyr][TfO], and 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide [C(4)mim][Tf2N] but only in limited amounts. Red photoluminescence was observed for the europium(III)-containing nanoparticles and near-infrared luminescence for the neodymium(III)-containing systems.

• 出版日期2009-8-6