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

Optical chemosensing of arsenite and ferrum ions using 4-(Benzylideneamino)-1,5-dimethyl-2-phenyl-1,2-dihydropyrazol-3-one

Hafiz Muhammad Junaid and Madeeha Batool

Centre for Analytical Chemistry, School of Chemistry, University of the Punjab, Quaid-E-Azam Campus, Lahore, Pakistan

E-mail: madeeha.chem@pu.edu.pk

Received: 21 November 2022  Accepted: 29 July 2023

Abstract:

Optical sensors have drawn considerable attention these days due to their quick, easy and on-site detection of metal ions. In this research, a Schiff base “4-(Benzylideneamino)-1,5-dimethyl-2-phenyl-1,2-dihydropyrazol-3-one (V-AAP)” was studied for its naked eye chemosensing abilities to detect metallic ions, i.e., Fe²⁺, Fe³⁺, Mn²⁺, Co²⁺, Cu²⁺, Zn²⁺, Ag⁺, Hg²⁺, Pb²⁺ and AsO₂⁻. This colorimetric probe exhibited selective color change from colorless to brownish yellow, pale yellow and greenish yellow for Fe²⁺, Fe³⁺ and AsO₂⁻ ions, with detection limits of 9.986 × 10^–7 M (0.056 ppm), 1.285 × 10^–6 M (0.072 ppm) and 2.465 × 10^–5 M (2.64 ppm), respectively. Moreover, binding ratios of V-AAP and Fe²⁺, Fe³⁺ and AsO₂⁻ ions were calculated to be 1:1 with binding constants 1.22 × 10² M⁻¹, 1.30 × 10³ M⁻¹ and 9.30 × 10¹ M⁻¹, correspondingly.

Graphical Abstract

Keywords: Optical Sensing; Naked eye sensing; Colorimetric Sensing; Schiff base; Arsenite ions; Ferrum ions

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-023-03008-7

Chemical Papers 77 (11) 7163–7172 (2023)