Multi-channel detection of Au(III) ions by a novel rhodamine based probe

Suna G., Erdemir E., Liv L., Gunduz S., Öztürk T., Karakuş E.

Sensors and Actuators B: Chemical, vol.360, 2022 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 360
  • Publication Date: 2022
  • Doi Number: 10.1016/j.snb.2022.131658
  • Journal Name: Sensors and Actuators B: Chemical
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Analytical Abstracts, Biotechnology Research Abstracts, Chemical Abstracts Core, Communication Abstracts, INSPEC, Metadex, Pollution Abstracts, Civil Engineering Abstracts
  • Keywords: Rhodamine, Fluorescent sensor, Gold (III) ion detection, Multi-channel probe, Electrochemical sensor
  • Istanbul Technical University Affiliated: Yes


© 2022 Elsevier B.V.Ionic gold species display remarkable features in chemical and biological activities. However, high amount of gold ions, especially Au3+ ions (200 µM), seriously threaten living organisms and vital human organs. Therefore, accurate detection of Au3+ ions is highly desirable. In this work, a novel rhodamine based optical and electrochemical active probe, integrated with triphenylamine and thiophene moiety, exhibited highly selective detection of Au(III) ions compared to the other metal species, such as Ag+, K+, Li+, Na+, Hg2+, Ba2+, Ca2+, Cd2+, Cu2+, Co2+, Mg2+, Mn2+, Ni2+, Pb2+, Zn2+ Pd2+, Al3+, Ce3+, Cr3+, Fe3+ and Cr6+. Exploiting hydrolysis and ring-opening reaction, the probe offers privileged properties such as naked-eye detection (colorimetric), both “turn-on” and “turn-off” fluorescence responses, voltammetric read-out with an anodic shift, low detection limit (340 and 315 nM for “turn-on” and “turn-off”, respectively), rapid response, and applicability in determining Au(III) in complex water samples.