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Abstract
In the context, pillared layered hybrid materials Ln(PDA)33—LDH are prepared through ion exchange assembly of luminescent lanthanide coordination polymers [H2NMe2]3[Ln(DPA)3] (Ln = Eu, Tb, Sm, Dy, Nd; [H2NMe2]+ = dimethyl amino cation; H2DPA = 2,6-dipicolinic acid) and pillared layered double hydroxide (Mg6Al2(OH)16CO3·4H2O). Among Mg-Al LDH interacts with [H2NMe2]3[Ln(DPA)3] through anion exchange ([Ln(PDA)3]3-) and electrostatic effect to form [Ln(PDA)3]3--LDH. All these hybrids display the typical Ln3+ emission. By controlling the composition of different Ln3+ cations in hybrid systems, the luminescent color can be tuned and the white light output can be realized. Furthermore, with careful adjustment of the excitation wavelength, the color of the luminescence can be modulated. Moreover, the white light emissive thin film based on the [Dy/Eu(PDA)3]3--LDH are prepared in order to extend their potential application, which displays desirable white light.
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