Synchronous Fluorescence Determination of Al3+ Using 3-Hydroxy-2-(4-Methoxy Phenyl)-4H-Chromen-4-One as a Fluorescent Probe

Shikha Bhogal; Promila Sharma; Pooja Rani; Kuldeep Kaur; Ashok Kumar Malik

doi:10.1007/s10895-021-02855-5

Synchronous Fluorescence Determination of Al³⁺ Using 3-Hydroxy-2-(4-Methoxy Phenyl)-4H-Chromen-4-One as a Fluorescent Probe

J Fluoresc. 2022 Jan;32(1):359-367. doi: 10.1007/s10895-021-02855-5. Epub 2021 Dec 1.

Authors

Shikha Bhogal^#¹, Promila Sharma^#¹, Pooja Rani¹, Kuldeep Kaur², Ashok Kumar Malik¹

Affiliations

¹ Department of Chemistry, Punjabi University, Patiala-147002, Punjab, India.
² Department of Chemistry, Mata Gujri College, Fatehgarh Sahib-140406, Punjab, India. shergillkk@gmail.com.

^# Contributed equally.

PMID: 34851472
DOI: 10.1007/s10895-021-02855-5

Abstract

A simple synchronous fluorescent chemosensor 3-hydroxy-2-(4-methoxyphenyl)-4H-chromen-4-one (3-HC) has been synthesized for the selective analysis of Al³⁺. On the addition of Al³⁺, 3-HC displayed a redshift with a change in wavelength of emission maximum from 436 to 465 nm along with enhancement in fluorescence intensity, which formed the basis for its sensitive detection. Under optimized conditions, 3-HC was applied for the determination of Al³⁺ in the concentration range of 1 × 10^-7-1 × 10^-6 M. The limit of detection (LOD) and limit of quantification (LOQ) values were found out to be 1.69 × 10^-8 and 5.07 × 10^-8 M respectively. Further, the developed method was applied for the analysis of Al³⁺ in real water samples (tap water, bottled water, and tube well water) which showed good recovery values in the range of 95-99.7% with RSD less than 4%.

Keywords: 3-hydroxy chromones; Aluminium; Solvatochromic effects; Synchronous fluorescence.