A cerium-based metal–organic framework having inherent oxidase-like activity applicable for colorimetric sensing of biothiols and aerobic oxidation of thiols
作者:Rana Dalapati、Balasubramanian Sakthivel、Manoj K. Ghosalya、Amarajothi Dhakshinamoorthy、Shyam Biswas
DOI:10.1039/c7ce01053b
日期:——
A cerium-based metal–organic framework (MOF; 1) with a UiO-66 (UiO: University of Oslo) framework topology was synthesized solvothermally by employing 3,4-dimethylthieno[2,3-b]thiophene-2,5-dicarboxylic acid as a ligand. The MOF was thoroughly characterized by X-ray photoelectron spectroscopy (XPS), X-ray powder diffraction, infrared spectroscopy, and thermogravimetric and N2 sorption analyses. The
利用3,4-二甲基噻吩并[2,3 - b ]噻吩-2,5-通过溶剂热法合成了具有UiO-66(UiO:奥斯陆大学)骨架拓扑的基于铈的金属有机骨架(MOF;1)。二羧酸作为配体。通过X射线光电子能谱(XPS),X射线粉末衍射,红外光谱以及热重和N 2吸附分析对MOF进行了全面表征。活化的材料(1')在水,乙酸和1 M HCl溶液中保持其结构完整性。XPS调查揭示了两者的Ce(存在III)和Ce(IV)离子在1。由于存在混合价铈离子,所以1'能够在没有外部氧化剂的情况下氧化发色过氧化物酶底物3,3',5,5'-四甲基联苯胺(TMB)或2,2'-叠氮基双(3-乙基苯并噻唑啉-6-磺酸)(AzBTS) 。因此,它显示出固有的类似氧化酶的催化性能。受1'出色的模仿氧化酶活性的启发,开发了一种用于比色法快速检测NaAc缓冲液(0.2 M,pH = 4)中生物硫醇的方案。在人血浆中也证明了1'对半胱氨酸