Abstract
Solvothermal reactions of Ln(NO3)3·6H2O (Ln=Nd, Pr, Sm and Eu) with a new penta-carboxylate strut obtain a series of 3D lanthanide metal–organic frameworks (Ln-MOFs), namely, {[Ln3(bpbc)(Hbpbc)(H2O)8]·3H2O} (1) 1-Ln (Ln=Nd, Pr, Sm and Eu). The four compounds are all isostructural as confirmed by the analysis of single crystal and powder X-ray diffractions. The compounds exhibit the 3D networks with a 3-nodal (4,5,7)-connected (413·68)2(44·62)(48·62)2 topology. 1-Nd and 1-Pr exhibit characteristic luminescence in the near-infrared (NIR) region, resulting from the vary degree sensitization of bpbc5− with different Ln3+ ions. Moreover, the other solid properties such as the luminescence of 1-Sm and 1-Eu and the magnetic properties of 1-Nd, 1-Pr and 1-Eu have also been investigated.
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