Multi-emitting fluorescence sensor of MnO2-OPD-QD for the multiplex and visual detection of ascorbic acid and alkaline phosphatase
- Authors
- Yang, Qian; Li, Chuyao; Li, Jinhua; Arabi, Maryam; Wang, Xiaoyan; Peng, Hailong; Xiong, Hua; Choo, Jaebum; Chen, Lingxin
- Issue Date
- 28-Apr-2020
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- JOURNAL OF MATERIALS CHEMISTRY C, v.8, no.16, pp 5554 - 5561
- Pages
- 8
- Journal Title
- JOURNAL OF MATERIALS CHEMISTRY C
- Volume
- 8
- Number
- 16
- Start Page
- 5554
- End Page
- 5561
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/44205
- DOI
- 10.1039/c9tc07072a
- ISSN
- 2050-7526
2050-7534
- Abstract
- A blue-, yellow- and red-emitting fluorescence sensor was constructedviathe synergy of manganese dioxide (MnO2) nanosheets,o-phenylenediamine (OPD) and red-fluorescent quantum dots (r-QDs), namely MnO2-OPD-QD, for visualization of ascorbic acid (AA) and alkaline phosphatase (ALP). Initially, by virtue of the oxidase-like activity of MnO(2)nanosheets, OPD was oxidized into yellow-fluorescent OPDox (emission: 569 nm), which quenched the r-QDs (emission: 659 nm). After interaction with AA, one reaction product of ALP and 2-phospho-l-ascorbic acid (AA2P), the MnO(2)nanosheets were reduced and lost the oxidase-like activity, so that the generation of OPDox was lessened and the fluorescence of the r-QDs was thereupon recovered. Further increasing AA or ALP, the MnO(2)nanosheets were fully decomposed so that OPD was not oxidized but was reduced into blue-fluorescent OPDred (emission: 441 nm), while the r-QDs were not affected. Overall, AA or ALP triggered emission intensity changes at 441, 569 and 659 nm and led to profuse color variation over the yellow-orange-red-purple range, realizing multiplex and visual determination of AA and ALP in the ranges of 0.5-70 mu M and 0.1-100 mU mL(-1), respectively. The color variation range of the ternary-emission mode was greatly enlarged, especially compared with that of the single-/dual-emission mode. Accordingly, the MnO2-OPD-QD sensor provided detection limits for AA and ALP as low as 0.18 mu M and 0.06 mU mL(-1), respectively. Furthermore, the highly selective/sensitive measurement and accurate readout of AA and ALP were accomplished in complicated food and serum samples. The multi-emitting fluorescence sensor held great potential for onsite visualization of various targets in more fields.
- Files in This Item
-
- Appears in
Collections - College of Natural Sciences > Department of Chemistry > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.