A water-stable Zn(II)-based metal-organic framework as a multifunctional fluorescent sensor for vitamin B6, Fe3+ ion and cephalexin

IF 4.3 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Pub Date : 2025-05-10 DOI:10.1016/j.saa.2025.126384

Xiao-Qing Wang , Xiangting Wang , Hongli Zhu , Yongyan Xue , Jie Yang , Peipei Cui , Jingjing Jiao

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引用次数: 0

Abstract

A water-stable metal–organic framework Zn-MOF, [Zn₃(tzta)₂(NMP)₂(H₂O)₂]·2H₂O, was successfully synthesized under solvothermal condition using a carboxylate-tetrazolyl ligand H₂tzta (H₂tzta = 2-(2-H-tetrazol-5-yl)-terephthalic acid). Zn-MOF exhibits a three-dimensional (3D) framework structure with rtl rutile topological type. The TGA and PXRD measurements demonstrate the high thermostability and water stability. The solid-state fluorescence emission spectra present that Zn-MOF and H₂tzta exhibit the similar emission peaks. Furthermore, Zn-MOF can be used as a “turn-on” fluorescent sensor to detect vitamin B₆ (VB₆) and cephalexin (CEP) in phosphate buffer solution, and it can also sense Fe³⁺ as a “turn-off” fluorescent sensor in phosphate buffer solution. The limit of detection for VB₆, Fe³⁺ and CEP are 0.080 μM, 0.29 μM and 0.021 μM, respectively. In addition, the fluorescence detection mechanism of Zn-MOF for VB₆, Fe³⁺ and CEP was discussed based on fluorescence resonance energy transfer (FRET), internal filtration effect (IFE) and photon-induced electron transfer (PET). Significantly, a visual film utilizing Zn-MOF@SA was constructed for the detection of VB₆, Fe³⁺ and CEP with high reusability and visuality.

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水稳定Zn（II）基金属有机骨架作为维生素B6、Fe3+离子和头孢氨苄的多功能荧光传感器

以羧酸-四唑基配体H2tzta （H2tzta = 2-（2- h -四唑-5-基）-对苯二甲酸）为原料，在溶剂热条件下成功合成了水稳定型金属-有机骨架Zn-MOF [Zn3(tzta)2(NMP)2(H2O)2]·2H2O。Zn-MOF呈现出具有金红石拓扑型的三维（3D）框架结构。TGA和PXRD测试表明该材料具有较高的热稳定性和水稳定性。固态荧光发射光谱显示，Zn-MOF和H2tzta表现出相似的发射峰。此外，Zn-MOF可以作为“开启”荧光传感器检测磷酸盐缓冲溶液中的维生素B6 （VB6）和头孢氨苄（CEP），也可以作为“关闭”荧光传感器检测磷酸盐缓冲溶液中的Fe3+。对VB6、Fe3+和CEP的检出限分别为0.080 μM、0.29 μM和0.021 μM。此外，基于荧光共振能量转移（FRET）、内部过滤效应（IFE）和光子诱导电子转移（PET），讨论了Zn-MOF对VB6、Fe3+和CEP的荧光检测机理。利用Zn-MOF@SA构建了VB6、Fe3+和CEP检测的视觉膜，具有较高的可重用性和可视性。

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来源期刊

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 物理-光谱学

CiteScore

8.40

自引率

11.40%

发文量

1364

审稿时长

40 days

期刊介绍： Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy (SAA) is an interdisciplinary journal which spans from basic to applied aspects of optical spectroscopy in chemistry, medicine, biology, and materials science. The journal publishes original scientific papers that feature high-quality spectroscopic data and analysis. From the broad range of optical spectroscopies, the emphasis is on electronic, vibrational or rotational spectra of molecules, rather than on spectroscopy based on magnetic moments. Criteria for publication in SAA are novelty, uniqueness, and outstanding quality. Routine applications of spectroscopic techniques and computational methods are not appropriate. Topics of particular interest of Spectrochimica Acta Part A include, but are not limited to: Spectroscopy and dynamics of bioanalytical, biomedical, environmental, and atmospheric sciences, Novel experimental techniques or instrumentation for molecular spectroscopy, Novel theoretical and computational methods, Novel applications in photochemistry and photobiology, Novel interpretational approaches as well as advances in data analysis based on electronic or vibrational spectroscopy.