A functional cobalt-organic framework constructed by triphenylamine tricarboxylate: Detect nitroaromatics by fluorescence sensing and UV-shielding

Mixed matrix membranes based on fluorescent coordination polymers for the detection of Cr2O72− in water

“…26,27 We further tested the effect of pH on the detecting response of the MMMs. The results showed that the fluorescence intensity of m-1, m-2 and m-3 in water at different pH values (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14) reduced slightly in comparison to the fluorescence intensity in water at pH 7 (Fig. S8 † Fluorescence quenching of CPs caused by ions is mainly due to the following possibilities: (i) destruction of the CP structure; 28 (ii) interaction between target ions and organic ligands in CPs; 29 (iii) interaction between target ions and metal atoms in CPs; 30 (iv) overlap between the UV-vis absorption bands of target ions and the excitation bands of CPs; 31 and (v) overlap between the UV-vis absorption band of target ions and the fluorescent emission bands of CPs.…”

“…Fluorescent coordination polymers (CPs) constructed with metal ions/clusters and organic linkers have attracted remarkable attention because of their tunable and stable structures coupled with excellent selectivity and sensitivity for detecting pollutants. [10][11][12][13] The introduction of fluorescent CP particles into a polymer matrix to form mixed matrix membranes (MMMs) showed many advantages. For example, MMMs showed better flexibility and processability than CPs particles and can be shaped into various morphologies for applications; MMMs have better recyclability than pure CP powders, which reduce the loss of CP materials.…”

Co-MOF@MWCNTs/GCE for the sensitive detection of TBHQ in food samples

“…3C depicts the C 1s XPS spectrum, and three peaks are observed at 283.6, 284.8, and 287.5 eV, which are attributed to the carbon-carbon single bond (C-C), carboncarbon double bond (CvC), and carbon-oxygen double bond (CvO) in the carboxyl group, respectively. 27 Fig. 3D reveals the XPS spectrum of O 1s, and its characteristic peaks at 530.6, 532.5 and 533.8 eV represent the groups associated with the metal oxide bond, coordination lattice oxygen and organic CvO bond, respectively.…”