A two-dimensional zinc(II)-based metal-organic framework for fluorometric determination of ascorbic acid, chloramphenico
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ORIGINAL PAPER
A two-dimensional zinc(II)-based metal-organic framework for fluorometric determination of ascorbic acid, chloramphenicol and ceftriaxone Wensheng Liu 1 & Xiaoyan Qu 2 & Chengfeng Zhu 3 & Yuanhao Gao 4 & Changjie Mao 1 & Jiming Song 1 & Helin Niu 1 Received: 13 June 2019 / Accepted: 25 October 2019 # Springer-Verlag GmbH Austria, part of Springer Nature 2020
Abstract A two-dimensional zinc(II)-based metal-organic framework [Zn • (BA) • (BBI)] was synthesized from 1,2-benzenediacetic acid and 1,1′-(1,4-butanediyl) bis(imidazole) via a solvothermal reaction. The crystal exhibits good chemical stability in the pH range from 2 to 12, and strong fluorescence with excitation/emission maxima of 270/290 nm. The crystal is shown to by a viable fluorescent probe for the detection of ascorbic acid (AA) and the antibiotics chloramphenicol (CHL) and ceftriaxone (CRO). Fluorescence intensity of crystal dispersion is significantly quenched with increasing concentrations of AA/CHL/CRO. Quenching occurs even in the presence of other substances. The assay is fast (5 s) and has a low detection limit (1.6 ppb for AA, 12 ppb for CHL and 3.9 ppb for CRO). The crystal still has a good quenching effect on AA/CHL/CRO after washing and using for five times. The response of the probe is related to the interplay between the MOF and analytes via energy absorption competition. Keywords 1,1′-(1,4-Butanediyl)bisimidazole . Zn • (BA) • (BBI) . Fluorescent probe . Quenching . Serum analysis
Introduction Ascorbic acid (AA) is an essential vitamin, chloramphenicol (CHL) and ceftriaxone (CRO) are two important clinically antibiotics for human beings. But inappropriate intake of AA and abuse CHL/CRO can cause many diseases and damages in the human body such as scurvy, cancer [1–3]. Techniques have been developed for assaying AA, CHL and CRO, such as electrochemistry (EC) [4], chromatography [5], enzymology [6], titration [7] and spectrophotometry [8]. Compared with
these methods, the optical analysis [9, 10] has attracted much attention due to simple operation and low detection limit such as nanosheets [11] and carbon quantum dots [12] are used as fluorescent probes for assaying ascorbic acid. However, it is still a challenge in terms of reusability of materials. Metal-Organic Frameworks (MOFs) have been used to make a wide variety of optical materials due to their unique luminescence properties, high porosity, reusability, etc. [13]. A series of MOFs with special luminescent properties had been synthesized and used as various probes [14] for the detection of substances
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s00604-019-3979-3) contains supplementary material, which is available to authorized users. * Chengfeng Zhu [email protected] * Helin Niu [email protected] 1
AnHui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Institutes of Physical Science and Information Technology Key Laboratory of Structure and Functional Regulation of Hyb
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