Lanthanide-Based
Metal–Organic Frameworks Containing “V-Shaped”
Tetracarboxylate Ligands: Synthesis, Crystal Structures, “Naked-Eye”
Luminescent Detection, and Catalytic Properties

Wu, Pengyan; Xia, Lingling; Huangfu, Mengjie; Fu, Fubin; Wang, Mengqiu; Wen, Bingxin; Yang, Ziyun; Wang, Jian

doi:10.1021/acs.inorgchem.9b02177.s001

ic9b02177_si_001.pdf (1.34 MB)

Lanthanide-Based Metal–Organic Frameworks Containing “V-Shaped” Tetracarboxylate Ligands: Synthesis, Crystal Structures, “Naked-Eye” Luminescent Detection, and Catalytic Properties

journal contribution

posted on 2019-12-16, 05:31 authored by Pengyan Wu, Lingling Xia, Mengjie Huangfu, Fubin Fu, Mengqiu Wang, Bingxin Wen, Ziyun Yang, Jian Wang

Three lanthanide-based metal–organic frameworks, [Tb(HMDIA)(H₂O)₃]·H₂O (Tb-MDIA), [Ho(HMDIA)(H₂O)₃]·(H₂O)₂ (Ho-MDIA), and [Nd(HMDIA)(H₂O)₃]·(H₂O)₂ (Nd-MDIA) from the same V-shaped ligand 5,5′-methylenediisophthalic acid (H₄MDIA), were prepared by mixing Ln³⁺ and H₄MDIA under solvothermal conditions. The crystal structures of the three complexes were determined by single-crystal X-ray diffraction. The different coordination modes of the organic ligands resulted in different framework structures among the three complexes. The luminescent properties of Ln-MDIA in the ultraviolet–visible region were also studied. Interestingly, the bright-green emitter Tb-MDIA showed high selectivity and sensitivity to allow the naked-eye visualization of Fe³⁺ ions and picric acid (PA) explosive, and both sensing mechanisms were revealed. Finally, Ho-MDIA and Nd-MDIA were shown to work as heterogeneous catalysts for the cyanosilylation reaction of aromatic aldehydes, and the catalysts could be recycled at least three times without any decrease in activity.