Selective Recognition of Ni2+ Ion Based on Fluorescence Enhancement Chemosensor Publisher Pubmed



Ganjali MR^{1, 2} ; Hosseini M³ ; Motalebi M⁴ ; Sedaghat M¹ ; Mizani F⁴ ; Faridbod F¹ ; Norouzi P^{1, 2}
Source: Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy Published:2015

Abstract

A new enhancing fluorescent chemosensor was introduced for selective and sensitive determination of nickel ions based on 2-(1-H-benzo[d]imidazol-2yl)-N-phenyl hydrazine carbothioamide (L). L has an intrinsic fluorescent emission which enhances in presence of nickel ions in CH3CN/H2O (70:30, v/v) solution. The fluorescence enhancement of L is attributed to a 1:1 complex formation between L and Ni2+ ion which has been used for selective detection of Ni2+ ion. At the optimum conditions, the fluorescence intensity of L at 352 nm enhances linearly by the concentration of nickel ion from 1.6 × 10-5 to 1.6 × 10-7 M and detection limit of 7.9 × 10-8 M. The new fluorescent probe exhibited high selectivity to Ni2+ ion over the other common mono, di-and trivalent cations. © 2014 Elsevier B.V. All rights reserved.