ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

3,3′,5,5′-Tetramethylbenzidine and polyetherimide decorated silver nanoparticles for colorimetric Mn²⁺ ions detection in aqueous solution

Zhikun Zhang, Chunyan Shang, Wenmeng Zhao, Yapeng Cao, Jilong Han, Cuixia Hu, and Yumin Liu

School of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang, China

E-mail: 552114916@qq.com

Received: 28 April 2022  Accepted: 18 July 2022

Abstract:

In this work, colorimetric Mn²⁺ ions detection was developed using 3,3′,5,5′-tetramethylbenzidine (TMB) and polyetherimide (PEI) decorated silver nanoparticles in aqueous solution. Silver nanoparticles solution were firstly prepared and it showed yellow color. Silver nanoparticles were decorated by TMB and PEI as modifier to synthesize PEI-TMB-AgNPs probe for Mn²⁺ ions detection; meanwhile, the color changed from yellow to red. We utilized PEI-TMB-AgNPs as probe to detect Mn²⁺ ions. The results showed that Mn²⁺ ions induced PEI-TMB-AgNPs color change from red to green own to the coordinate bond between PEI/TMB and Mn²⁺ ions in aqueous solution. In addition, the PEI-TMB-AgNPs would be changed into oval-shaped structure. The optimal concentration of TMB and PEI as modifiers was 5 µM and 1 ng/mL, respectively. Signal response was found to be proportional to Mn²⁺ ions concentration in the range from 20 nM to 1 µM with a correlation coefficient of 0.993, with UV–Vis and colorimetric detection limits determined as 1 nM and 200 nM, respectively. The developed platform was successfully used to detect Mn²⁺ ions in simulated samples. It was also sufficiently stable and selective for practical applications.

Keywords: Manganese ions; Silver nanoparticles; 3,3′,5,5′-Tetramethylbenzidine; Polyetherimide; Colorimetric detection

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-022-02384-w

Chemical Papers 76 (11) 7253–7260 (2022)