A water‐stable luminescent sensor based on Cd²⁺ coordination polymer for detecting nitroimidazole antibiotics in water

Abstract

Effective detection of antibiotics is essential for human health and environmental protection. A new type of water-stable fluorescent sensor was synthesized and characterized. The antibiotics in the water were detected by fluorescence spectroscopy. The complex presents excellent fluorescence quenching effect on nitroimidazole antibiotics with high selectivity and sensitivity and shows lower limits of detection with a wider linear range. The limit of detection (LOD) of the complex are 0.46 nM for ornidazole (ODZ), 0.73 nM for dimetridazole (DTZ), and 0.46 nM for metronidazole (MDZ). The K sv values are calculated to be 1.11 Â 10 4 M À1 for ODZ, 0.70 Â 10 4 M À1 for DTZ, and 1.10 Â 10 4 M À1 for MDZ. In addition, the sensor is recyclable and is expected to be used in the detection of nitroimidazole antibiotics in water. The luminescence quenching of Cd 2+ complex towards nitroimidazole antibiotics ascribed to the combination of electron transfer and energy transfer.

Coordination Polymers Constructed from an Adaptable Pyridine-Dicarboxylic Acid Linker: Assembly, Diversity of Structures, and Catalysis

“…[Co(μ 4 -pdba)(py)] n (7) and [Ni(μ 4 -pdba)(py)] n (8). These CPs are isomorphous (Table 2) and the structure of a 2D coordination polymer 8 is discussed as an example (Figure 6).…”

“…54−59 Hence, the present work reports the hydrothermal assembly, complete characterization, X-ray structural features, topological analysis, thermal stability, and catalytic behavior of eight new coordination polymers (Scheme 1) assembled from the pdba 2− linkers and different coligands acting as mediators of crystallization. On the basis of elemental analysis, thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), powder X-ray diffraction (PXRD), and singlecrystal structural characterization, the isolated CPs were formulated as: [Mn(μ 4 -pdba)( (6), and [M(μ 4pdba)(py)] n (M = Co (7), Ni (8)). In addition to extending a number of CPs assembled from H 2 pdba, the present work also describes their catalytic application in the mild coupling of benzaldehyde with propanedinitrile to give 2-benzylidenemalononitrile (model Knoevenagel reaction).…”

“…Coordination polymers (CPs) are currently recognized as highly auspicious functional compounds owing to their captivating structural features, unique properties, and extensive diversity of applications in gas separation and storage, − sensing, − bioactive materials, − catalysis, − and many other areas. − The properties of CPs are governed by their structural and topological characteristics, as well as types of linkers and metal nodes. − Although the synthesis of coordination polymers can be tuned toward explicit structural and topological types, − a full control of the outcome of self-assembly reactions remains challenging because many factors can have an influence on the crystallization of CPs, namely, connectivity of linkers, , coordination preferences of metal ions, , presence of coligands, as well as reaction parameters (solvents, temperatures, pH values). − …”

“…Coordination polymers (CPs) are currently recognized as highly auspicious functional compounds owing to their captivating structural features, unique properties, and extensive diversity of applications in gas separation and storage, 1 − 6 sensing, 7 − 11 bioactive materials, 12 − 14 catalysis, 15 − 22 and many other areas. 23 − 27 The properties of CPs are governed by their structural and topological characteristics, as well as types of linkers and metal nodes.…”

Syntheses, Crystal Structures, and Catalytic Properties of Three Cu(II) and Cobalt(II) Coordination Compounds Based on an Ether-Bridged Tetracarboxylic Acid

“…In recent years, designing and assembling new transition metal coordination polymers and derived materials have become the subjects of extensive investigation owing to their intriguing structures and their various applications as potential functional materials [1][2][3][4][5][6][7][8][9][10][11][12]. The selection of transition metal ions and their compounds is primarily driven by their advantageous characteristics, including cost-effectiveness, availability, as well as their remarkable bio-and photoactive properties [13][14][15].…”