Du Xiaoyang, Zhang Xiaoxia, Jiang Chunlai, Zhang Weilu, Yang Lizhu
College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China.
The Atmospheric Environment Department, Chinese Academy for Environmental Planning, Beijing 100012, China.
Sensors (Basel). 2018 Feb 25;18(3):681. doi: 10.3390/s18030681.
A novel fluorescence sensor of NR-β-CD@AuNPs was prepared for the trace detection of nitrite in quantities as low as 4.25 × 10 μg∙mL in an aqueous medium. The fluorescence was due to the host-guest inclusion complexes between neutral red (NR) molecules and gold nanoparticles (AuNPs), which were modified by per-6-mercapto-beta-cyclodextrins (SH-β-CDs) as both a reducing agent and a stabilizer under microwave radiation. The color of the NR-β-CD@AuNPs changed in the presence of nitrite ions. A sensor was applied to the determination of trace nitrites in environmental water samples with satisfactory results.
制备了一种新型荧光传感器NR-β-CD@AuNPs，用于在水介质中痕量检测低至4.25×10 μg∙mL的亚硝酸盐。荧光源于中性红（NR）分子与金纳米颗粒（AuNPs）之间的主客体包合物，在微波辐射下，全6-巯基-β-环糊精（SH-β-CD）作为还原剂和稳定剂对金纳米颗粒进行了修饰。在亚硝酸根离子存在下，NR-β-CD@AuNPs的颜色发生变化。该传感器应用于环境水样中痕量亚硝酸盐的测定，结果令人满意。
