Collaborative Innovation Center of Chemical Science and Engineering, Key Laboratory of Advanced Energy Materials Chemistry (MOE), College of Chemistry , Nankai University , Tianjin 300071 , P. R. China.
Technical Center for Safety of Industrial Products , Tianjin Entry-Exit Inspection and Quarantine Bureau , Tianjin 300071 , P. R. China.
Anal Chem. 2019 Feb 5;91(3):2148-2154. doi: 10.1021/acs.analchem.8b04690. Epub 2019 Jan 17.
In order to accurately and conveniently measure temperature and water content in bioethanol, a dual-function ratiometric luminescence sensor has been fabricated successfully based on mixed lanthanide metal-organic frameworks (MOFs) EuDy-MOF. In this MOF, the two lanthanides and ligand (HL) form three luminescence centers, and they have different sensitivity toward water and temperature. Using the ratio of luminescence intensity at 416 and 614 nm, the MOF could quantitatively determine the concentration of water in dry ethanol and in bioethanol with recoveries of 91% -107%, and a detection limit of 0.1%, which is much lower than that in hydrated ethyl alcohol fuel (AEHC), 0.8% in China, 1.0% in the United States, and 4.9% in Brazil. Using the luminescence intensity ratio of EuD → F (614 nm) transition to DyF → H (573 nm) transition, the MOF could also sense temperature in range of 293 to 373 K, and 150 to 290 K with high accuracy, excellent linear relationship, reversibility, and recyclability.
为了准确、便捷地测量生物乙醇中的温度和水分含量，成功制备了基于混合镧系金属-有机骨架（MOFs）EuDy-MOF 的双功能比率发光传感器。在该 MOF 中，两种镧系元素和配体（HL）形成三个发光中心，它们对水和温度的敏感性不同。通过比较 416nm 和 614nm 处的发光强度比值，该 MOF 可以定量测定干乙醇和生物乙醇中水分的浓度，回收率为 91%-107%，检测限为 0.1%，远低于中国的 0.8%、美国的 1.0%和巴西的 4.9%的水合乙醇燃料（AEHC）。通过比较 EuD→F（614nm）跃迁到 DyF→H（573nm）跃迁的发光强度比值，该 MOF 还可以在 293 至 373K 和 150 至 290K 的范围内准确地感测温度，具有出色的线性关系、可逆性和可回收性。
