A highly selective multifunctional Zn‐coordination polymer sensor for detection of Cr (III), Cr (VI) ion, and TNP molecule

Abstract

A new coordination polymer based on the 4-(2,2′;6′,2″-tripyridyl)-4′-1,2-phenyl dicarboxylic acid (H 2 tbda), namely, [Zn (tbda)] n (1), features a onedimensional binuclear chain structure and exhibits the excellent luminescence in pH range of 3-12 in aqueous solution. Particularly, compound 1 shows the remarkable selectivity, anti-interference, and recyclability for sensing Cr (III) ion through the fluorescence enhancement. Meanwhile, compound 1 can also serve as a sensor for detecting the trace amounts of Cr (VI) ion and 2,4,6trinitrophenol (TNP) with high selectivity and recyclability through the fluorescence quenching effect. Furthermore, the detection mechanisms of compound 1 as a fluorescence sensor for different analytes have been explored in detail.

Isomers of Terpyridine as Ligands in Coordination Polymers and Networks Containing Zinc(II) and Cadmium(II)

“…Under solvothermal conditions (DMF/H 2 O, 160 °C), ZnSO 4 ·6H 2 O and H 2 8 combine to give [Zn( 8 )] n ( Figure 6 b). The presence of the two CO 2 – groups per ligand facilitates the assembly of a double-stranded chain [ 33 ]. This may be compared to the double-stranded chain found in [ZnCl( 4 )] n ·[ZnCl(OH 2 )( 4 )] n ( Figure 5 e), but the additional carboxylate groups lead to distinct differences in the dinuclear building blocks in the 1D-chain.…”

Retracted: A new 3D pillar‐layered Cd(II) compound: Luminescence sensing property for detection of Fe3+ ions and treatment activity on focal cerebral ischemia/reperfusion

“…[12][13][14][15] Under this background, some MOFs were synthesized and structurally analyzed, which show luminescence sensing properties for the probe of Fe 3+ , CrO 4 2À , Cr 2 O 7 2À , CS 2 , nitroaromatic explosives with high selectivity and sensitivity. [16][17][18][19] On the other hand, cadmium is a toxic metal, which has lesser value in medicinal chemistry, but the study on the drug activity of such compound would pave way to understand the structural requirements or the role of a metal ion in drugs. Recent studies in the literature have revealed that some Cd(II)-based coordination complexes show interesting bioactivity.…”

Two luminescent cuprous iodides with hitherto-unknown free imidazolate sites for efficiently sensing Fe3+ and Cr2O72−

“…5g and h) for Cr 2 O 7 2− showed almost linear correlation at low concentrations ( R 2 = 0.9895 for 1 and 0.9927 for 2 ), and the K sv values are 3.95 × 10 3 M −1 for 1 and 3.53 × 10 3 M −1 for 2 . The detection limits were calculated to be 5.81 ppm for 1 and 14.73 ppm for 2 , which might be compared with other well-designed sensing materials (4.75–32.4 ppm), 21 a ,22 suggesting that 1 and 2 are efficient sensors for detecting Cr 2 O 7 2− in aqueous media.…”