In this work, we present novel kinds of γ-Fe₂O₃@SiO₂-NH₂-CMC/MOF5 and γ-Fe₂O₃@SiO₂-NH₂-CMC/IRMOF3 magnetic metal–organic framework (MOF) nanoparticles which possess both magnetic characteristics and fluorescent properties. Here, [Zn₄O(bdc)₃] (MOF-5, bdc = 1,4-benzenedicarboxylate) is a kind of shell. IRMOF3, a known MOF with a cubic topology prepared from Zn(NO₃)₂4H₂O and 2-amino-1,4-benzene dicarboxylic acid, is another kind of shell which is attractive due to its highly porous, crystalline structure and the presence of non-coordinating amino groups on the benzenedicarboxylate (bdc) linker, which are amenable to post-synthetic modification. γ-Fe₂O₃@SiO₂-NH₂-CMC magnetic nanoparticles (MNPs) could be prepared by covalent modification of sodium carboxymethyl cellulose (CMC). The structure of γ-Fe₂O₃ nanoparticles could be determined by X-ray powder diffraction (XRD). X-ray photoelectron spectroscopy (XPS) spectra could be used for the characterisation of γ-Fe₂O₃@SiO₂-NH₂, γ-Fe₂O₃@SiO₂-NH₂-CMC, γ-Fe₂O₃@SiO₂-NH₂-CMC/MOF5, and γ-Fe₂O₃@SiO₂-NH₂-CMC/IRMOF3 nanoparticles. Magnetic solid-phase extraction (MSPE) of enrofloxacin (Enr) experiments exhibited that, for γ-Fe₂O₃@SiO₂-NH₂-CMC/IRMOF3, the best effects of adsorption could be obtained at pH 4 and 6, while elution conditions of 0.1 mol L⁻¹ NaOH and 1 % sodium dodecyl sulfate could achieve the best elution effect. The addition of Tb³⁺ ions could sensitise the fluorescence of Enr. At the same time, via the addition of Tb³⁺ ions, coordination could occur between nanoparticles and Tb³⁺ ions, which could be verified by XPS.

在这项工作中，我们本发明的新种γ-的Fe ₂ ö ₃ @SiO ₂ -NH ₂ -CMC / MOF5和γ-的Fe ₂ ö ₃ @SiO ₂ -NH ₂ -CMC / IRMOF3磁性金属-有机骨架（MOF）同时具有磁性和荧光性质的纳米颗粒。在此，[Zn ₄ O（bdc）₃ ]（MOF-5，bdc ＝ 1，4-苯二甲酸）是一种壳。IRMOF3，已知的具有立方拓扑的MOF，由Zn（NO ₃）₂ 4H ₂制备O和2-氨基-1,4-苯二羧酸是另一种具有吸引力的壳，因为其高度多孔的晶体结构以及苯二羧酸酯（bdc）接头上存在非配位氨基，这是可以接受的后合成修饰。了γ-Fe ₂ ö ₃ @SiO ₂ -NH ₂ -CMC磁性纳米颗粒（的MNP）可以通过羧甲基纤维素钠的共价修饰（CMC）制备。γ-Fe的结构_2个ö ₃纳米颗粒可以通过X射线粉末衍射（XRD）来确定。X射线光电子能谱（XPS）光谱可用于表征了γ-Fe ₂ ö ₃ @SiO ₂-NH ₂，γ-的Fe ₂ ö ₃ @SiO ₂ -NH ₂ -CMC，γ-的Fe ₂ ö ₃ @SiO ₂ -NH ₂ -CMC / MOF5，和γ -铁₂ ö ₃ @SiO ₂ -NH ₂ - CMC / IRMOF3纳米粒子。恩氟沙星的磁性固相萃取（MSPE）（ENR）的实验显示出，对于γ-的Fe ₂ ö ₃ @SiO ₂ -NH ₂ -CMC / IRMOF3，可以在pH为4和6中获得的吸附效果最好，而洗脱条件为0.1 mol L ^-1NaOH和1％十二烷基硫酸钠可达到最佳洗脱效果。Tb ³⁺离子的添加​​可以增强Enr的荧光。同时，通过添加Tb ³⁺离子，纳米粒子与Tb ³⁺离子之间可能发生配位，这可以通过XPS验证。