A series of NaNdF4 nanocrystals was synthesized via a facile hydrothermal route with Nd(C3H7COO)3·Phen and Nd(NO3)3·Phen (Phen,1,10-phenanthroline) as the Nd precursors.Distinct effect of the neutral donor ligand (Phen) on the morphology of NaNdF4 nanocrys-tals was demonstrated.When Nd(C3H7COO)3·Phen was chosen and the hydrothermal reaction temperature was controlled at 220 ℃,the NaNdF4 nanocrystals with uniform short nanorod shape were obtained.The sizes of the as-prepared nanorods could be tuned by changing the hydrothermal temperatures.This method provided a useful way for the preparation of sodium rare-earth fluoride nanocrystals with controlled shapes and sizes.
The neodymium trifluoroacetate complexes were synthesized and characterized by single-crystal X-ray diffraction for [Nd(CF3COO)3·Bpy·(H2O)3]Bpy(1),elemental and TG analysis,FT-IR spectra,and PL spectra for Nd(CF3COO)3·Bpy(2)(Bpy:2,2'-bipyri-dine).The most interesting feature of the crystal structure for 1 is that it comprises a coordinated 2,2'-bipyridine molecule and an out-sphere 2,2'-bipyridine molecule.At the same time,the C-O distances appeared average which indicates the three atoms of carboxylato forming elec-tron-conjugate system.Hydrogen bond and π-π-stacking link the binuclear to two-dimensional sheet.The optical spectra for 2 exhibited that the complex possessed typical Nd(III) ion absorption and photoluminescence emission.The emission cross-section of 4F3/2→4I11/2 fluores-cence transition(3.63×10-20 cm2) was comparable with some laser glasses,which indicated good radiative properties of this neodymium trifluoroacetate complex in liquid matrix.The thermal analysis indicated that it was quite stable to heat.
