Ratiometric detection of I using a dysprosium-based metal-organic framework with a single emission center.

In this study, a dysprosium-based metal-organic framework (MOF) sensor (Dy-MOF) was developed for the ratiometric detection of I in aqueous medium. Upon excitation at 230 nm, Dy-MOF shows two dominant emission bands at 464 nm and 574 nm assigned to (F, D) → H + F and F → H transition of Dy, respectively, which have different sensitivities toward iodide ions. The introduction of I slightly weakened the blue emission at 464 nm and significantly quenched the yellow emission at 574 nm.

A ratiometric luminescence sensing platform based on lanthanide-based silica nanoparticles for selective and sensitive detection of Fe and Cu ions.

Detection of Fe(III) and Cu(II) in water is highly desirable because their abnormal levels can cause serious harm to human health and environmental safety. In this work, a ratiometric luminescence sensing platform based on lanthanide-based silica nanoparticles was constructed for the detection of Fe and Cu ions. The terbium-silica nanoparticles (named SiO@Tb) with dual-emission signals were successfully prepared by grafting Tb ions onto trimellitic anhydride (TMA) functionalized silica nanospheres.

An europium(III) metal-organic framework as a multi-responsive luminescent sensor for highly sensitive and selective detection of 4-nitrophenol and I and Fe ions in water.

A luminescence sensor based on an europium(III)-based lanthanide-organic framework, [Eu(BCB)(DMF)]·(DMF)(HO) (1), was synthesized a solvothermal method using 4,4',4''-benzenetricarbonyltribenzoic acid (HBCB) as a bridging ligand. Single-crystal X-ray diffraction indicates that Eu centers are eight-coordinated with a trigonal dodecahedron and a square antiprismatic configuration, and adjacent Eu atoms are bridged by BCB organic linkers to form a 3D rod-packing structure. Photoluminescence studies show that compound 1 emits bright red luminescence and behaves as a multi-responsive luminescent sensor toward 4-nitrophenol (4-NP) and I and Fe ions in water with high sensitivity, selectivity and low detection limits.

Growth differentiation factor-15 predicts the prognoses of patients with acute coronary syndrome: a meta-analysis.

Background: Recent studies have shown Growth differentiation factor-15 (GDF-15) that is a member of the transforming growth factor β (TGF-β) superfamily might be a potential predictive cytokine for the prognosis of Acute coronary syndrome (ACS). However, there are discrepancies in these studies.

Methods: Publication searches of the PubMed/Medline and EMBASE databases were performed without any time or ethnicity restrictions.