Synthesis of high quantum yield rhenium-doped carbonized polymer dots for dual sensing of Fe3+ and Mo6+ and anti-counterfeit ink applications

Yushu Han; Xin Kong; Rui Bao; Jianhong Yi; Liang Liu; Ying Gu; Lunzhao Yi

doi:10.1016/j.talanta.2023.124913

Synthesis of high quantum yield rhenium-doped carbonized polymer dots for dual sensing of Fe³⁺ and Mo⁶⁺ and anti-counterfeit ink applications

Talanta. 2023 Dec 1:265:124913. doi: 10.1016/j.talanta.2023.124913. Epub 2023 Jul 7.

Authors

Yushu Han¹, Xin Kong², Rui Bao³, Jianhong Yi⁴, Liang Liu¹, Ying Gu⁵, Lunzhao Yi⁵

Affiliations

¹ Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China.
² Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China. Electronic address: kt1010@126.com.
³ Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China. Electronic address: baorui@kust.edu.cn.
⁴ Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China. Electronic address: yijianhong@kust.edu.cn.
⁵ Faculty of Food Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China.

PMID: 37451120
DOI: 10.1016/j.talanta.2023.124913

Abstract

The bottom-up approach serves as an efficacious and noteworthy method for the synthesis of carbonized polymer dots (CPDs). In the present investigation, rhenium-doped CPDs (Re-CPDs) were successfully synthesized via a hydrothermal technique employing citric acid, urea, and NH₄ReO₄. Subsequent to a comprehensive series of characterizations, Re-CPDs demonstrated an average particle size of 2.67 nm, excitation/emission maxima of 377/461 nm, and an elevated quantum yield of 45.36% at 377 nm excitation. Through the selectivity analysis involving various metal ions, Re-CPDs displayed sensitivity towards Fe³⁺ and Mo⁶⁺ ions, with limits of detection (LODs) of 0.02 μM and 0.48 μM, respectively. Furthermore, Re-CPDs exhibited multi-chromatic fluorescence (450-550 nm) under excitation wavelengths (375-430 nm). As a result, by amalgamating Re-CPDs with sucrose, detection patterns capable of generating multi-chromatic fluorescence at excitation wavelengths of 375, 395, and 430 nm, respectively, were successfully devised. In summary, Re-CPDs hold considerable potential as a material for the detection of Fe³⁺ and Mo⁶⁺ ions, as well as for anti-counterfeiting ink applications.

Keywords: Anti-counterfeit ink; Carbonized polymer dots; Fe(3+) ions sensor; Mo(6+) ions sensor; Rhenium.