Abstract
A series of novel three-dimensional lanthanide metal–organic frameworks (Ln-MOFs) were prepared under solvothermal conditions. These Ln-MOFs are formulated as [Ln4(L)3(H2O)8]n·3nNO3, [Ln = Sm (1), Eu (2), Gd (3), Tb (4), H4L+Cl- = 1,3-bis(3,5-dicarboxyphenyl) imidazolium chloride]. Complexes 1–4 were characterized by X-ray single-crystal diffraction, infrared spectroscopy, powder X-ray diffraction and thermogravimetric analysis. Compounds 1, 2 and 4 display the luminescence of the trivalent lanthanide ions, due to the 4fn-4fn transitions. In addition, the luminescence lifetime of 2 has been thoroughly investigated.
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