基于碳点的OFF-ON型荧光传感器检测Hg^(2+)和S^(2-)  

The OFF-ON Fluorescent Sensor Based on Carbon Dots in Detecting Hg^(2+)And S^(2-)

作　　者：金燕婷 严佳龙 林伟娟 黄燕 于逸鹏 JIN Yanting;YAN Jialong;LIN Weijuan;HUANG Yan;YU Yipeng(College of Materials Science and Engineering,Xiamen University of Technology,Xiamen 361024,China)

机构地区：[1]厦门理工学院材料科学与工程学院,福建厦门361024

出　　处：《东莞理工学院学报》2021年第5期107-112,共6页Journal of Dongguan University of Technology

基　　金：福建省自然科学基金(2012J05099)基于自组装膜的痕量污染物的界面识别与荧光传感。

摘　　要：以柠檬酸铵为原料合成的碳点,其表面含有大量的氨基和羧基,汞离子可以与这两种官能团发生络合反应,猝灭碳点的荧光。硫离子能够和汞离子结合形成稳定的不溶物硫化汞,使得碳点的荧光重新恢复。该工作是通过制备开关型(OFF-ON型)荧光传感器检测环境中的污染物Hg^(2+)与S^(2-)。这种OFF-ON型的传感器,在检测S^(2-)时选择性良好,灵敏度较高。因此,碳点作为一种新型的传感材料,因其尺寸优势具有优良的发光性能,被广泛应用于金属离子检测、阴离子传感、生物分子传感等研究领域。The ammonium citrate was used as raw material,so the surface of carbon dots contain ammonia,carboxyl and hydroxyl groups.Because of complexation of mercury and surface chemical groups,flurescence can be quenched rapidly.However,sulfur ions can be combined with mercury ions to form Insoluble substance,mercury sulfide,restoring the fluorescence of the carbon dots.This work is to detect contaminants Hg^(2+)and S^(2-)in the environment by the preparation of switching type(type OFF-ON)fluorescent sensors.This OFF-ON-type sensor,with good selectivity in detecting S^(2-),has high sensitivity.Therefore,as a new sensing material,the carbon dot is widely used in metal ion detection,anion sensing,and biomolular sensing due to its excellent dimensional advantages.

关 键 词：碳点 OFF-ON荧光传感器 荧光共振能量转移 

分 类 号：O657.3[理学—分析化学]