High Emission Zinc Metal‐Organic Framework for Sensitive and Selective Detection of Fe³⁺, Cr⁶⁺ and Nitrofurazone Antibiotic

Abstract

Based on 3-bpmh ligand (3-bpmh = N, N'-bis-pyridin-3-ylmethylene-hydrazine) and H 2 HPA (H 2 HPA = Homophthalic acid), a new complex, namely, [Zn(HPA)(3-bpmh)] n (1), was synthesized. Powder X-ray diffraction (PXRD), thermogravimetric analysis (TGA), infrared spectroscopy (IR) and elemental analysis (EA) were used to characterize the crystal structure. Complex 1 presents a 2D planar structure, which accumulates into a 3D spatial structure through C-H … π interactions. Complex 1 has multi-response photoluminescence sensing characteristic. It has excellent selectivity and sensitivity to Fe 3 + , CrO 4 2À and Cr 2 O 7 2À in domestic sewage and Nitrofurazone (NFZ) antibiotic. In addition, the fluorescence quenching mechanisms were also discussed.

Multifunctional Cadmium-Based Metal–Organic Frameworks for the Detection of Ion and Molecule in Aqueous Media

“…This may be due to the coordination effect between ligands and metal ions in MOFs, , and the charge transfer from ligands to metal ions causes the emission peak to shift in the direction of short wavelengths. In addition, the π–π bond in the complex acts as an energy trap, reducing nonradiative energy loss and producing blue shift . Then, we investigated their fluorescence sensing properties in an aqueous solution.…”

Multi‐responsive Luminescent Probe with Bis‐imidazolyl Biphenyl and Aromatic Polycarboxylic Acids Ligands for Sensing Fe3+, Cr2O72− and CrO42− in Aqueous Solution

“…[34,35] The π-π interaction in the complex reduces the non-radiation energy loss and produces the blue shift phenomenon. [36] In addition, due to the d 10 electronic configuration of Zn(II) ion, it is difficult to be reduced and oxidized. Therefore, it cannot be attributed to metal to ligand charge transfer (MLCT) or ligand to metal transfer (LMCT).…”

“…Carboxylic acid molecules are rich in coordination sites, providing a favorable environment for the binding of basic groups [22] . The nitrogen coordination sites in the nitrogen‐containing ligands provide suitable luminescence ideas and greatly promote their applications in metal ion sensing [23] . Based on the above considerations and judgments, 1,2‐phenylenediacetic acid (H 2 HEA) and 4,4′‐bis((1H‐imidazol‐1‐yl)methyl)‐1,1′‐biphenyl (LBIX) (Figure 1) were used as the organic ligands, solvothermal reaction was carried out with transition metal Zn 2+ ions to synthesize an luminescent metal‐organic framework: [Zn(LBIX)(HEA)] n .…”

Cellulose Ester-Based Aerogel: Lightweight and Highly Water-Absorbent

“…Although there are some studies in the literature on cellulose esterification and cellulose aerogel production, aerogel production from cellulose obtained by recycling local waste is not very common. In addition, there are limited studies in the context of “green chemistry” on the production and detailed characterization of carboxylic acid-modified hybrid aerogels that provide functionality and superior properties − such as HPA. We believe that this research will provide important information about the potential uses and production techniques of biopolymers and green industrial aerogels, thus adding a significant value to the academic field.…”