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. Graphical abstract Schematic diagram of preparing Zn • (BA) • (BBI) and responding to target analytes. BA: 1,2-phenyldiacetic acid; BBI: 1,1′-(1,4-butanediyl)bis(imidazole); Zn • (BA) • (BBI): Crystal chemical formula.

中文翻译：

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用于荧光测定抗坏血酸、氯霉素和头孢曲松的二维锌 (II) 基金属有机骨架

以1,2-苯二乙酸和1,1'-(1,4-丁二基)双(咪唑)为原料合成了二维锌(II)基金属有机骨架[Zn•(BA)•(BBI)] ) 通过溶剂热反应。该晶体在 2 到 12 的 pH 值范围内表现出良好的化学稳定性，并具有强烈​​的荧光，激发/发射最大值为 270/290 nm。该晶体由一种用于检测抗坏血酸 (AA) 和抗生素氯霉素 (CHL) 和头孢曲松 (CRO) 的可行荧光探针显示出来。晶体分散体的荧光强度随着 AA/CHL/CRO 浓度的增加而显着淬灭。即使存在其他物质，也会发生淬火。该检测速度快（5 秒）且检测限低（AA 为 1.6 ppb，CHL 为 12 ppb，CRO 为 3.9 ppb）。该晶体经洗涤使用5次后，对AA/CHL/CRO仍具有良好的淬火效果。探针的响应与 MOF 和分析物之间通过能量吸收竞争的相互作用有关。图形摘要 制备 Zn • (BA) • (BBI) 和响应目标分析物的示意图。BA：1,2-苯基二乙酸；BBI：1,1'-(1,4-丁二基)双(咪唑)；Zn • (BA) • (BBI)：晶体化学式。