Anion-induced deprotonation as a simple strategy to improve analytical performance of an amphiphilic probe at mesoscopic interface

Dey, N and Kumari, N (2022) Anion-induced deprotonation as a simple strategy to improve analytical performance of an amphiphilic probe at mesoscopic interface. In: Results in Chemistry, 4 .

Preview	PDF res_che_04_2022.pdf - Published Version Download (3MB) | Preview
	Microsoft Word 1-s2.0-S2211715621001533-mmc1.docx - Published Supplemental Material Download (1MB)

Abstract

A systematic improvement in the metal ion binding ability of a pyrene functionalized oxidized bisindolyl compound was investigated in the aqueous medium. In water, a color-changing response from orange to red was observed upon the addition of Hg2+ ion. However, in this condition, the compound suffered issues like poor selectivity (interference from Cu2+, Cd2+, and Zn2+) and low sensitivity (�1.6-fold increment in absorbance). Incorporating nonionic surfactant as solubilizing agent alters the protonation equilibrium of the compound and improves its analytical performance to some extent (�2.5-fold increment in absorbance by Hg2+ and minor interference from Cu2+ and Zn2+ ions). However, an excellent selectivity (no interference) towards Hg2+ ion was achieved when the probe molecules were undergone anion-induced deprotonation reaction before the interaction with metal ions. Also, the deprotonated receptor demonstrated superior sensitivity for Hg2+ (yellow to red color change, �5.2-fold increment in absorbance). Thus, in this work, we have developed anion-triggered deprotonation as an alternative strategy for improving the analytical performance of an oxidized bisindolyl probe. © 2021

Item Type:	Journal Article
Publication:	Results in Chemistry
Publisher:	Elsevier B.V.
Additional Information:	The copyright for this article belongs to Author
Department/Centre:	Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited:	06 Jan 2022 06:16
Last Modified:	06 Jan 2022 06:16
URI:	http://eprints.iisc.ac.in/id/eprint/70804

Actions (login required)

View Item