Puglisi Roberta, Pellegrino Anna L, Fiorenza Roberto, Scirè Salvatore, Malandrino Graziella
Dipartimento di Scienze Chimiche, Università degli Studi di Catania, Viale Andrea Doria 6, I-95125 Catania, Italy.
Dipartimento di Scienze Chimiche, Università degli Studi di Catania, INSTM UdR Catania, Viale Andrea Doria 6, I-95125 Catania, Italy.
Sensors (Basel). 2021 Mar 1;21(5):1679. doi: 10.3390/s21051679.
Gadolinium metal-organic frameworks (Gd-MOFs) and Eu-doped Gd-MOFs have been synthesized through a one-pot green approach using commercially available reagents. The 1,4-benzenedicarboxylic acid (H-BDC) and 2,6-naphthalenedicarboxylic acid (H-NDC) were chosen as ditopic organic linkers to build the 3D structure of the network. The Gd-MOFs were characterized using powder X-ray diffraction (XRD), FT-IR spectroscopy, field emission scanning electron microscopy (FE-SEM) and N adsorption-desorption analysis. The Gd-MOF structures were attributed comparing the XRD patterns, supported by the FT-IR spectra, with data reported in the literature for Ln-MOFs of similar lanthanide ionic radius. FE-SEM characterization points to the effect of the duration of the synthesis to a more crystalline and organized structure, with grain dimensions increasing upon increasing reaction time. The total surface area of the MOFs has been determined from the application of the Brunauer-Emmett-Teller method. The study allowed us to correlate the processing conditions and ditopic linker dimension to the network surface area. Both Gd-MOF and Eu-doped Gd-MOF have been tested for sensing of the inorganic ions such as Fe and CrO.
钆金属有机框架材料（Gd-MOFs）和铕掺杂的Gd-MOFs已通过使用市售试剂的一锅法绿色合成方法制备出来。选用1,4-苯二甲酸（H-BDC）和2,6-萘二甲酸（H-NDC）作为双齿有机连接体来构建网络的三维结构。采用粉末X射线衍射（XRD）、傅里叶变换红外光谱（FT-IR）、场发射扫描电子显微镜（FE-SEM）和N吸附-脱附分析对Gd-MOFs进行了表征。通过将XRD图谱与FT-IR光谱相结合，并与文献中报道的具有相似镧系离子半径的Ln-MOFs数据进行比较，确定了Gd-MOFs的结构。FE-SEM表征表明合成时间对形成更结晶和有序的结构有影响，随着反应时间的增加，晶粒尺寸增大。通过应用布鲁诺尔-埃米特-泰勒方法测定了MOFs的总表面积。该研究使我们能够将加工条件和双齿连接体尺寸与网络表面积联系起来。已对Gd-MOF和铕掺杂的Gd-MOF进行了检测无机离子如Fe和CrO的测试。
