Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Ratio fluorescence sensor based on CD/Cu-MOFs for detection of Hg2+

Not Accessible

Your library or personal account may give you access

Abstract

Trace detection of toxic heavy metals is a very important and difficult problem in several areas: convenience, sensitivity, and reliability. Herein, we develop an innovative fluorescence resonance energy transfer (FRET)-based ratio fluorescence sensor for the detection of heavy metal mercury ion (${{\rm Hg}^{2 +}}$). The sensing platform is composed of coumarin derivatives (CDs) and a copper metal-organic framework (Cu-MOF) named CD/Cu-MOF. The constructed CD/Cu-MOFs ratio fluorescence sensor exhibits dual emission peaks at 430 and 505 nm under the single excitation wavelength of 330 nm. With the addition of ${{\rm Hg}^{2 +}}$, the fluorescence intensity of the system at 430 nm gradually increased, and the fluorescence intensity at 505 nm remained stable, resulting in a change in the fluorescence ratio. There is a good logarithmic relationship between the ${{\rm Hg}^{2 +}}$ concentration in the range from ${2} \times {{10}^{- 8}}$ to 0.001 nM and the ratio of the fluorescence emission intensity of the system (${{\rm F}_{430}}/{{\rm F}_{505}}$) (${{\rm R}^2} = {0.9901}$), and its calculated detection limit is ${3.76} \times {{10}^{- 9}}\;{\rm nM}$. In addition, the CD/Cu-MOFs ratio fluorescence sensor has achieved a good recovery rate of standard addition in the actual food sample recovery experiment, which provides an effective method for the detection of ${{\rm Hg}^{2 +}}$ in food samples.

© 2023 Optica Publishing Group

Full Article  |  PDF Article
More Like This
Optical fluorescent sensor based on perovskite QDs for nitric oxide gas detection

Divyanshu Kumar, Rispandi Mesin, and Cheng-Shane Chu
Appl. Opt. 62(12) 3176-3181 (2023)

Fluorescence characteristics of Cu-ZSM-5 zeolites in reactive gas mixtures: mechanisms for a fiber-optic-based gas sensor

Jeffrey T. Remillard, Ben D. Poindexter, and Willes H. Weber
Appl. Opt. 36(16) 3699-3707 (1997)

Ratiometric optical fiber sensor for dual sensing of copper ion and dissolved oxygen

Cheng-Shane Chu and Chih-Yung Chuang
Appl. Opt. 54(36) 10659-10665 (2015)

Data availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (10)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (2)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All rights reserved, including rights for text and data mining and training of artificial technologies or similar technologies.