Journal:Organic Electronics

Volume:99

Page Number:106347

Key Words:Conjugated polymers，Sensors，Naked-eye detection，Zn2+，Sustainable removal

DOI number:10.1016/j.orgel.2021.106347

Date of Publication:2021-09-28

Impact Factor:3.721

Abstract:A conjugated polymer with ratiometric absorption, namely poly-deca-4,6-diynedioic acid (PDDA), has been developed for the naked-eye detection of zinc ions (Zn2+) in water samples. This probe possesses both excellent Zn2+ selectivity and great sensitivity based on the absorption ratio change of PDDA upon the addition of Zn2+. The water-soluble PDDA is able to detect Zn2+ in the pH range of 6.4–10.4, and the detection of Zn2+ by PDDA is not affected by the presence of other metal ions and anions. PDDA appears yellow with a maximal absorption at 468 nm, and shows a significant color change from yellow to orange when Zn2+ reaches 1.0 mg/L (the national standard of China), and to pink color when Zn2+ reaches 3.0 mg/L (the World Health Organization recommended level). Notably, PDDA also serves as a reusable adsorbent to effectively remove Zn2+ in water samples, with an average recovery rate of 97.75% for PDDA and a removal efficiency of 84.54% for Zn2+. PDDA herein represents an unprecedented probe integrating the rapid and accurate naked-eye identification of Zn2+, as well as the efficient and sustainable removal of Zn2+ in water media.

Links to published journals:https://doi.org/10.1016/j.orgel.2021.106347