A general nonaqueous route has been applied for the preparation of lanthanide ordered nanocrystalline
hybrid structures. In a simple one-pot reaction process, Ln(III) isopropoxides (Ln = Gd, Sm, Nd) were
dissolved in benzyl alcohol and reacted in an autoclave between 250 and 300 °C. This approach leads to
crystalline lanthanide oxide layers regularly separated from each other by organic layers of intercalated
benzoate molecules. They display good thermal stability for temperature up to 400 °C. The gadolinium-based nanohybrids showed outstanding optical emission properties when doped with terbium(III) and
europium(III).
The porous metal-organic framework UiO-66(Zr) obtained via non modulated synthesis, has revealed to be a notable heterogeneous catalyst, enabling extremely fast and very efficient desulfurization of a multicomponent model diesel and also a real diesel fuel.
A general nonaqueous route has been applied for the preparation of rare-earth ordered nanocrystalline hybrid
structures. In a simple one-pot reaction process, Y3+ and Gd3+ isopropoxides were reacted in an autoclave
with 4-biphenylmethanol at 275 °C. This approach leads to crystalline rare-earth oxide thin layers (∼0.6 nm)
regularly separated from each other by organic layers of biphenolate molecules. The optical properties of
these hybrid materials doped with Eu3+ and Nd3+, which are optical active lanthanides ions emitting in the
red and near infrared, respectively, are presented. They show significant advantages compared to standard
phosphors, such as higher radiance and luminance values, the possibility to tune the emission chromaticity
by varying the excitation wavelength, and a much larger excitation range (250−350 nm and 300−500 nm for
the Eu3+ and Nd3+ doped nanohybrids, respectively) shifted toward the red.
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