1
|
He H, Huang J, Wang Q, Si X, Yan X, Lei Y, Li H, Luo L. Colorimetric and visual sensing of ferrous ion by Fenton reaction-stimulated etching of triangular gold nanoplates. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 299:122837. [PMID: 37209473 DOI: 10.1016/j.saa.2023.122837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 05/03/2023] [Accepted: 05/05/2023] [Indexed: 05/22/2023]
Abstract
In this study, a method for ultrasensitive sensing of Fe2+ based on Fenton reaction mediated etching of triangular gold nanoplates (Au NPLs) was developed. In this assay, the etching of Au NPLs by H2O2 was accelerated in the presence of Fe2+ due to the generation of superoxide free radical (O2·-) via Fenton reaction. With the concentration of Fe2+ increased, the shape of Au NPLs changed from triangular to sphere with the blue shifted localized surface plasmon resonance, accompanying a series of consecutive color changes from blue, bluish purple, purple, reddish purple and finally to pink. The rich color variations enable rapid visual quantitative determination of Fe2+ within 10 min. A good linear relationship between the peak shifts and the concentration of Fe2+ was obtained in the range of 0.035 to 1.5 μM (R2 = 0.996). Favorable sensitivity and selectivity in the presence of other tested metal ions were achieved in the proposed colorimetric assay. The detection limits (3ơ/k) for Fe2+ was 26 nM by UV-vis spectroscopy, and the clearly discernible concentration of Fe2+ was as low as 0.07 μM by naked eyes. The recoveries of fortified samples in pond water and serum samples ranged from 96% to 106% with interday relative standard deviations <3.6% in all cases, demonstrating the applicability of the assay for measuring Fe2+ in real samples.
Collapse
Affiliation(s)
- Haibo He
- Department of Chemistry, College of Sciences, Shanghai University, 99 Shangda Road, Shanghai 200444, PR China.
| | - Juan Huang
- Department of Chemistry, College of Sciences, Shanghai University, 99 Shangda Road, Shanghai 200444, PR China
| | - Qian Wang
- Department of Chemistry, College of Sciences, Shanghai University, 99 Shangda Road, Shanghai 200444, PR China
| | - Xiaojing Si
- Department of Food Science, Shanghai Business School, Shanghai 200235, PR China.
| | - Xiaoxia Yan
- Department of Chemistry, College of Sciences, Shanghai University, 99 Shangda Road, Shanghai 200444, PR China
| | - Yunyi Lei
- Department of Chemistry, College of Sciences, Shanghai University, 99 Shangda Road, Shanghai 200444, PR China
| | - Hongbo Li
- School of Chemistry and Chemical Engineering, Yanchang Institute of Technology, Yancheng 224051, PR China
| | - Liqiang Luo
- Department of Chemistry, College of Sciences, Shanghai University, 99 Shangda Road, Shanghai 200444, PR China
| |
Collapse
|
2
|
Wang H, Fu T, Ai M, Liu J. Ratiometric fluorescence nanoprobe based on carbon dots and terephthalic acid for determining Fe 2+ in environmental samples. Anal Bioanal Chem 2022; 414:6735-6741. [PMID: 35864267 DOI: 10.1007/s00216-022-04233-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Revised: 06/25/2022] [Accepted: 07/14/2022] [Indexed: 11/24/2022]
Abstract
A ratiometric fluorescent nanoprobe using carbon dots (CDs) and involving oxidation of terephthalic acid (TPA) induced by hydroxyl radicals (·OH) was developed for sensitively and selectively determining Fe2+ ions. When Fe2+ ions are added to the TPA@CDs/H2O2 system, ·OH produced through the Fenton reaction oxidizes the non-fluorescent TPA to give 2-hydroxyl terephthalic acid, which fluoresces at 423 nm when excited at 286 nm. The ·OH and Fe3+ produced quench CD fluorescence at 326 nm. The 2-hydroxyl terephthalic acid to CD fluorescence intensity ratio linearly increased as the Fe2+ concentration increased in the range 0.5-50 μM, and the detection limit was 0.25 μM. The new assay is very selective because it involves dual-emission reverse change ratio fluorescence sensing, which can exclude matrix effects. The new nanoprobe was used to determine Fe2+ concentrations in real water samples, and the recoveries were found to be acceptable. Schematic of the ratiometric fluorometric method for determining Fe2+ based on CDs and TPA.
Collapse
Affiliation(s)
- Huaxin Wang
- College of Chemistry and Materials Science, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, Anhui Normal University, Wuhu, 241000, China
| | - Ting Fu
- College of Chemistry and Materials Science, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, Anhui Normal University, Wuhu, 241000, China
| | - Mimi Ai
- College of Chemistry and Materials Science, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, Anhui Normal University, Wuhu, 241000, China
| | - Jinshui Liu
- College of Chemistry and Materials Science, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, Anhui Normal University, Wuhu, 241000, China.
| |
Collapse
|
3
|
Selective detection of Fe (III) via fluorescence turn-on mechanism with Rhodamine tethered poly(vinyl amine) microbeads. Polym Bull (Berl) 2021. [DOI: 10.1007/s00289-021-03930-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
|
4
|
Kang SY, Yin H, Zhang KQ, Chen X, Wang KZ. Chemosensing properties and logic gate behaviors of graphene quantum dot-appended terpyridine. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 99:657-668. [PMID: 30889739 DOI: 10.1016/j.msec.2019.02.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Revised: 01/07/2019] [Accepted: 02/04/2019] [Indexed: 10/27/2022]
Abstract
Graphene quantum dot-covalently appended terpyridine, GQDs-tpy, was synthesized and characterized by X-ray photoelectron spectroscopy, FTIR spectroscopy and transmission electron microscopy. GQDs-tpy was found to act as multifunctional chemosensors: a highly selective colorimetric chemosensor for Fe2+ as evidenced by an obvious color change from colorless to pink, and a typical fluorescence enhanced probe for Zn2+ over 13 metal cations even in practical water samples. Moreover, two-input XOR, INHIBIT and IMPICATION logic gates as well as four-input OR and NOR logic gates were constructed according to the characteristic responses of GQDs-tpy to a sequence of cations.
Collapse
Affiliation(s)
- Si-Yuan Kang
- Beijing Key Laboratory of Energy Conversion and Storage Materials and College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Hong Yin
- Beijing Key Laboratory of Energy Conversion and Storage Materials and College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Kai-Qi Zhang
- Beijing Key Laboratory of Energy Conversion and Storage Materials and College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Xiaobo Chen
- Applied Optics Beijing Area Major Laboratory and Physics Department, Beijing Normal University, Beijing 100875, China
| | - Ke-Zhi Wang
- Beijing Key Laboratory of Energy Conversion and Storage Materials and College of Chemistry, Beijing Normal University, Beijing 100875, China.
| |
Collapse
|