Metal–organic frameworks of lanthanide iminodiacetates and tartrates: Synthesis, structural characterization and luminescence properties — Commemorating the 100th anniversary of the birth of Academician Guangxian Xu

Two series of lanthanide-containing metal–organic frameworks (Ln-MOFs) the general formula {[Ln(HIDA)2H2O]ClO4·H2O}n (Ln = La (1), Nd (2), Eu (3), Gd (4), Tb (5), Eu:Tb (6); H2IDA iminodiacetic acid) and [Ln(TT) (HTT) (H2O)3]n (7), (8), (9), Dy (10), (11); H2TT tartaric were synthesized by reacting Ln(ClO4)3 with acid L-tartaric acid, respectively. All compounds structurally characterized single-crystal X-ray diffraction. Elemental analyses are consistent corresponding crystallographically generated formulas. Moreover, luminescence properties both single mixed-lanthanide complexes studied. Near infrared, red, green emissions that characteristic Nd(III), Eu(III), Tb(III) observed for 2, 3/7, 5/9, For two complex systems 6 11, depending on relative amount Eu(III) Tb(III), color emission can be fine-tuned. It is found a small adequate observation most intense transition Eu(III). This believed to result energy transfer from within same - conclusion supported significantly shortened lifetime accompanying enhanced in respect values pure ligand.