PH-Stable Eu- and Tb-organic-frameworks mediated by an ionic liquid for the aqueous-phase detection of 2, 4, 6-trinitrophenol (TNP). Issue 44 (30th October 2017) - Qin, Jian-Hua
Abstract : pH-Stable Eu- and Tb-organic-frameworks mediated by ionic liquids for the aqueous-phase detection of 2, 4, 6-trinitrophenol (TNP). Abstract : Two pH-stable luminescent metal–organic frameworks (LMOFs), {[Ln2 (L)2 (OH)(HCOO)]·[H2 O]} n (Ln = Eu1, Tb2 ), based on a new π-conjugated organic building block involving both carboxylate and terpyridine groups were rationally synthesized under a combination of hydro/solvothermal and ionothermal conditions (H2 L = 4′-(4-(3, 5-dicarboxylphenoxy)phenyl)-4, 2′:6′, 4′′-terpyridine).1 and2 are isostructural and feature noninterpenetrated open 3D condensed frameworks constructed by rod-shaped lanthanide-carboxylate building units. Their excellent water-stability and pH-stability allow them to be used in aquatic systems.1 and2 both exhibit selective and sensitive aqueous phase detection of the well-known nitroaromatic explosive environmental pollutant 2, 4, 6-trinitrophenol (TNP), which is highly desirable for practical applications. The presence of a free pyridine group on the LMOF particle surface was strategically utilized for the purpose of exclusive TNP-sensing.