Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Lanzhou 730070, PR China; Key Lab of Bioelectrochemistry and Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Lanzhou 730070, PR China.
Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Lanzhou 730070, PR China; Key Lab of Bioelectrochemistry and Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Lanzhou 730070, PR China.
Spectrochim Acta A Mol Biomol Spectrosc. 2023 Oct 15;299:122844. doi: 10.1016/j.saa.2023.122844. Epub 2023 May 10.
Carbonate ion (CO) is an anion essential for the maintenance of life activities and is of great importance to human health. Here, a novel ratiometric fluorescent probe Eu/CDs@UiO-66-(COOH) (ECU) was prepared by introducing europium ions (Eu) and carbon dots (CDs) into the UiO-66-(COOH) parent framework under the guidance of a post-synthetic modification strategy and used for the detection of CO ion in the aqueous environment. Interestingly, when CO ions were added to the ECU suspension, the characteristic emission of carbon dots at 439 nm was significantly enhanced, while the characteristic emission of Eu ions at 613 nm was reduced. Therefore, the detection of CO ions can be realized through the peak height ratio of the two emissions. The probe had a low detection limit (about 1.08 μM) and a wide linear range (0-350 μM) for the detection of carbonate. In addition, the presence of CO ions can cause a significant ratiometric luminescence response and resulted obvious red-to-blue color shift of the ECU under UV light, which will facilitate visual analysis by the naked eye.
碳酸根离子（CO）是维持生命活动所必需的阴离子，对人类健康具有重要意义。在此，我们通过后合成修饰策略，将镧系元素铕离子（Eu）和碳点（CDs）引入到UiO-66-（COOH）母体骨架中，制备了一种新型比率型荧光探针 Eu/CDs@UiO-66-（COOH）（ECU），并将其用于水相环境中 CO 离子的检测。有趣的是，当向 ECU 悬浮液中加入 CO 离子时，碳点在 439nm 处的特征发射显著增强，而 Eu 离子在 613nm 处的特征发射则降低。因此，可以通过两个发射峰的峰高比来实现 CO 离子的检测。该探针对碳酸根的检测具有较低的检测限（约 1.08μM）和较宽的线性范围（0-350μM）。此外，CO 离子的存在会导致 ECU 产生显著的比率型发光响应，并在紫外光下导致明显的红-蓝颜色位移，这将便于肉眼进行可视化分析。
