Aggregation-induced chemiluminescence system for sensitive detection of mercury ions
- PDF / 1,045,227 Bytes
- 9 Pages / 595.276 x 790.866 pts Page_size
- 97 Downloads / 218 Views
RESEARCH PAPER
Aggregation-induced chemiluminescence system for sensitive detection of mercury ions Yue Hou 1 & Ying Chen 1 & Xiaoyan Guo 1 & Wei Liu 1 & Liu Zhang 1 & Congcong Lv 1 & Yunlong Xu 1 & Yan Jin 1 & Baoxin Li 1 Received: 31 August 2020 / Revised: 19 October 2020 / Accepted: 27 October 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract As mercury ions (Hg2+) are emanated to surroundings in the course of various natural events and human activities, an accurate sensing of Hg2+ is essential for human health and environmental protection. Herein, a new aggregation-induced chemiluminescence (CL) sensor for fast, sensitive, and selective detection of Hg2+ is developed, based on the CL enhancement of bis(2,4,6trichlorophenyl)oxalate (TCPO)-H2O2 system by thiolate-protected gold complexes (Au(I)-thiolate complexes) in the aggregated state. Because Hg2+ has a strong interaction with hydrosulfuryl (-SH) groups in Au(I)-thiolate complexes, the aggregation is disrupted and the CL is quenched. The decrease of CL intensity is proportional to Hg2+ contents with a linear range of 0.005– 10 μg mL−1 and the limit of detection (LOD) is 3 ng mL−1. To the best of our knowledge, this is the first AIE CL sensor for Hg2+ detection. The study opens up attractive perspectives for developing simple and rapid aggregation-induced CL methods in monitoring heavy metals. Keywords Aggregation-induced emission . Chemiluminescence . Au(I)-thiolate complexes . Mercury ions
Introduction As we all know, mercury ions (Hg2+) are toxic and have negative impact on human body and environment [1]. They are released into the environment through industrial, domestic, and agricultural activities. Living in an environment with excessive level of Hg2+ for a long time causes mercury poisoning. The World Health Organization (WHO) [2] sets the maximum contamination level of Hg2+ in drinking water with 6 ppb and the U.S. Environmental Protection Agency (EPA) [3] sets the limit of Hg2+ with 2 ppb. Therefore, new methods for detecting Hg2+ are of great significance to human health and environment protection. In recent years, various analytical methods for Hg2+ detection have been reported, such as atomic absorption spectrometry [4, 5], inductively coupled plasma Supplementary Information The online version contains supplementary material available at https://doi.org/10.1007/s00216-02003033-5. * Wei Liu [email protected]; [email protected] 1
Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Shaanxi 710062 Xi’an, China
mass spectrometry (ICP-MS) [6, 7], and voltammetry [8]. However, these methods are time-consuming and usually require complicated instruments. To avoid these constraints, optical measurement is considered as an easy and quick way for Hg2+ detection [9]. Nevertheless, traditionally optical methods [10, 11] suffer from the aggregation-induced quenching (ACQ), which is a self-quenching phenomenon caused by the aggregation o
Data Loading...
