Open AccessCollaborative Construction of a Silver Nanocluster Fluorescent Probe Using the Pyridinium-Based Ionic Liquid [C4py][DCA]
Author(s) -
Shu Wang,
Enhui Zhou,
Xuemei Wei,
Ruanhui Liu,
Changjiang Li,
Le Pan,
Yuan Zheng,
Nannan Xing
Publication year - 2022
Publication title -
acs omega
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.779
H-Index - 40
ISSN - 2470-1343
DOI - 10.1021/acsomega.2c02172
Subject(s) - nanoclusters , pyridinium , ionic liquid , fluorescence , quenching (fluorescence) , detection limit , ionic bonding , pyridine , chemistry , materials science , inorganic chemistry , photochemistry , ion , nanotechnology , organic chemistry , chromatography , optics , physics , catalysis
A silver nanocluster fluorescent probe was synthesized by using the pyridinium-based ionic liquid [C 4 py][DCA] as the protective agent, AgNO 3 as the precursor, and NaBH 4 as the reducing agent. The presence of pyridine group enhanced the fluorescence intensity of Ag nanoclusters and facilitated the coordination interaction between Ag nanoclusters and AsO 3 3- . Therefore, the collaborative construction of a silver nanocluster probe using the pyridinium-based ionic liquid [C 4 py][DCA] offered outstanding selectivity and sensitivity to detect AsO 3 3- in water. More interestingly, the fluorescent probe quenched by AsO 3 3- could be recovered with the addition of H 2 O 2 . This fluorescent probe provided a rapid and superior method for the detection of As(III) in the linear concentration range of 0-60 ppb with the lowest detection limit of 0.60 ppb. The mechanism of fluorescence quenching was a static quenching, considered to be due to electron migration between functional groups on the surface of Ag nanoclusters constructed with [C 4 py][DCA] and AsO 3 3- .