Determination of Iodide via Direct Fluorescence Quenching at Nitrogen-Doped Carbon Quantum Dot Fluorophores
Author(s)
Zhang, Haimin
Li, Yibing
Liu, Xiaolu
Liu, Porun
Wang, Yun
An, Taicheng
Yang, Huagui
Jing, Dengwei
Zhao, Huijun
Griffith University Author(s)
Year published
2014
Metadata
Show full item recordAbstract
The development of analytical methods for rapidly, sensitively, and selectively detecting iodide (I-) in aqueous media is critically important because I- is closely related to human health because of a number of diseases caused by the deficiency and radioactivity of I-. In this work, we describe N-doped carbon quantum dots as the fluorophores for the direct determination of I- fluorescence, achieving a detection limit of 10 占with an analytical linear range up to 2.0 mM. The experimental results also demonstrate that the N-doped carbon quantum dot fluorophores possess high selectivity for I- detection. The presence of nitrogen ...
View more >The development of analytical methods for rapidly, sensitively, and selectively detecting iodide (I-) in aqueous media is critically important because I- is closely related to human health because of a number of diseases caused by the deficiency and radioactivity of I-. In this work, we describe N-doped carbon quantum dots as the fluorophores for the direct determination of I- fluorescence, achieving a detection limit of 10 占with an analytical linear range up to 2.0 mM. The experimental results also demonstrate that the N-doped carbon quantum dot fluorophores possess high selectivity for I- detection. The presence of nitrogen functional groups results in a positively charged carbon quantum dot surface, which is advantageous for the detection of I- fluorescence because of the strong electrostatic interaction between carbon quantum dots and I-. This work demonstrates the possibility of developing carbon quantum dot fluorophore-based fluorescence methods for the determination of other anions.
View less >
View more >The development of analytical methods for rapidly, sensitively, and selectively detecting iodide (I-) in aqueous media is critically important because I- is closely related to human health because of a number of diseases caused by the deficiency and radioactivity of I-. In this work, we describe N-doped carbon quantum dots as the fluorophores for the direct determination of I- fluorescence, achieving a detection limit of 10 占with an analytical linear range up to 2.0 mM. The experimental results also demonstrate that the N-doped carbon quantum dot fluorophores possess high selectivity for I- detection. The presence of nitrogen functional groups results in a positively charged carbon quantum dot surface, which is advantageous for the detection of I- fluorescence because of the strong electrostatic interaction between carbon quantum dots and I-. This work demonstrates the possibility of developing carbon quantum dot fluorophore-based fluorescence methods for the determination of other anions.
View less >
Journal Title
Environmental Science & Technology Letters
Volume
1
Issue
1
Copyright Statement
Self-archiving of the author-manuscript version is not yet supported by this journal. Please refer to the journal link for access to the definitive, published version or contact the authors for more information.
Subject
Inorganic chemistry not elsewhere classified
Environmental engineering
Environmental biotechnology