Four Novel Cobalt(II) Coordination Polymers Based on Anthracene-Derived Dicarboxylic Acid as Multi-functional Fluorescent Sensors toward Different Inorganic Ions

Abstract

A series of Co(II)−H 2 L coordination polymers were prepared with different auxiliary ligands, namely {5-{(anthracene-9-ylmethyl)-amino}isophthalic acid, bibp = 4,4′-bis(imidazolyl)biphenyl, bpy = 2,2′-bipyridine, bipd = 3,5-bis(1-imidazoly)pyridine, and bbibp = 4,4′-bis(benzoimidazo-1-yl)biphenyl), by a similar solvothermal method. X-ray diffraction analyses revealed that 1, 3, and 4 exhibit a two-dimensional (2D) structure, which further builds the threedimensional (3D) supramolecular architecture via the weakly interacting hydrogen bonds of C−H•••O, while 2 displayed a onedimensional (1D) double-chain architecture extended from two 1D zigzag chains by intermolecular hydrogen bonding interactions. The sensing experiments revealed that 1 and 2 can serve as either individual-and/or multi-responsive sensors to selectively detect Cr 3+ , Al 3+ , and Pb 2+ ions through the fluorescence turn-on effect, while 3−4 exhibited fluorescence turn-off sensing behavior for Fe 3+ ions. Moreover, 1−4 can effectively detect and recognize Cr 2 O 7 2− and CrO 4 2− due to their high selectivity and sensitivity for fluorescence quenching in aqueous solutions, and the sensing mechanism for various ions has been discussed.

Efficient detection of Al3+ and B4O72− over trigonal prism In(iii) complex

“…Single-crystal X-ray crystallography analysis revealed that 1 was crystallized in the trigonal space group R 3̄ (Table 1). The crystal structure of 1 shows a six-coordinate geometry around the indium centre, coordinated with three oxime oxygen atoms (O1) and three carbonyl oxygen atoms (O2) from three partially deprotonated ligands, which adopts a distorted trigonal prism coordination geometry and was confirmed by the continued shape measurement (CShM) 30,32,33 analysis (Fig. 1b); the results are listed in Table S1 †.…”

Selective dye sorption and metal ion sensing behaviours of a new Cd-based MOF

“…A summary of the sensing of Fe 3+ , Cr 3+ and Al 3+ ions using MOF materials is shown in Tables S6–S8 (ESI†), respectively. 52,59,89–120…”

Flexible Hexacarboxylate-Based Cobalt Metal–Organic Framework for the Turn-On/Off Detection of Cr3+, Al3+, Fe3+, and Phenylglyoxylic Acid

“…Single-crystal X-ray analysis indicated that 1 crystallized in the triclinic system P1̅ space group and featured a 3D supermolecular structure with two S2), which are comparable to those reported for other Co-based MOFs. 11,30,31 Interestingly, the interconnection of adjacent {Co3O S3). In 2, Co(II) ions are bridged by H 2 TTHA 4− and bidpe to form a tangled one-dimensional (1D) structure consisting of one infinite zigzag [Co− H 2 TTHA] n chain and two wavy [Co-bidpe] n chains, as shown in Figure 2b.…”