Synthesis of fluorescent naphthalimide-functionalized Fe3O4 nanoparticles and their application for the selective detection of Zn2+ present in contaminated soil
- Authors
- Kim, Kyung Tae; Yoon, Shin A.; Ahn, Junho; Choi, Yeonweon; Lee, Min Hee; Jung, Jong Hwa; Park, Junboum
- Issue Date
- May-2017
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Zinc; Naphthalimide; Fe3O4 nanoparticles; Nanomagnet; Soil contamination
- Citation
- SENSORS AND ACTUATORS B-CHEMICAL, v.243, pp 1034 - 1041
- Pages
- 8
- Journal Title
- SENSORS AND ACTUATORS B-CHEMICAL
- Volume
- 243
- Start Page
- 1034
- End Page
- 1041
- URI
- https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/8523
- DOI
- 10.1016/j.snb.2016.11.131
- ISSN
- 0925-4005
- Abstract
- A fluorescent dopamine-naphthalimide-dipicolylamine (DPA) was synthesized as a sensing receptor for Zn2+. Naphthalimide-DPA (2) was immobilized onto the surface of iron oxide nanoparticle to prepare a hybrid nanomagnet 1-Fe3O4. Naphthalimide-DPA (2) and 1-Fe3O4 were observed to bind with Zn-2*, leading to significant increase in fluorescence intensity at 527 nm. The fluorescence increases of 2 (10 mu m) and 1-Fe3O4 (0.33 wt%) by addition of Zn2+ were linear over the [Zn2+ range of 0-7 mu M and 0-20 mu m, respectively. These fluorescence changes were highly selective for Zn2+, which were readily monitored even in the presence of other competitive cations. In particular, 1-Fe3O4 exhibited an excellent limit of detection determined to be 0.0345 ppb. Furthermore, this system was found to be suitable for detecting Zn2+ in a wide pH range of 3-11 and could be reused with the addition of ethylenediaminetetraacetic acid (EDTA). Moreover, nanomagnet 1-Fe3O4 was employed for the selective detection and removal of Zn2(+) from a soil sample. These results confirm that the use of 1-Fe3O4 is a novel and simple method for detecting Zn2+ in environmental samples. (C) 2016 Elsevier B.V. All rights reserved.
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