Bismuth triggered selective colorimetric naked-eye detection for oxalate ions based on bromopyrogallol red that works as a molecular keypad lock. Issue 5 (9th April 2021)

• Record Type: Journal Article
• Authors: Tavallali, Hossein; Deilamy-Rad, Gohar; Parhami, Abolfath; Asghari, Khadije; Ahmadi, Azade
• Is Part Of: International journal of environmental analytical chemistry. Volume 101:Issue 5(2021)
• Page Start: 648
• Page End: 667
• Publication Date: 2021-04-09
• Subjects: Colorimetric chemosensor -- naked-eye detection -- bromopyrogallol red -- bismuth(III) recognition -- oxalate recognition -- keypad lock; Ecology -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental chemistry -- Periodicals; Pollution -- Periodicals; 577.14
• DOI: 10.1080/03067319.2019.1670824
• Languages: English
• ISSNs: 0306-7319

Abstract

ABSTRACT: A novel colorimetric probe based on the bromopyrogallol red (BPR) for the sequential detection of Bi 3+ and C2 O4 2− was designed. The presence of Bi 3+ led to a distinct naked-eye colour change in DMSO/H2 O (1:3, v/v) media. The detection limit of BPR for Bi 3+ was down to nanomolar concentration (1.17 nmol L −1 ). Also, the sensing ability of BPR for Bi 3+ was successfully carried out in bismuth tablet and urine sample. Moreover, the resulting BPR-Bi 3+ complex acted as an efficient colorimetric chemosensor for C2 O4 2− via a colour change. Therefore, chemosensor BPR-Bi 3+ can illustrate the ability to determine C2 O4 2- up to 0.15 µmol L −1, selectively. Notably, the absorbance changes of BPR upon the addition of Bi 3+ and C2 O4 2− were utilised as AND and NAND logic gates operating at the molecular level with Bi 3+ and C2 O4 2− as chemical inputs and the absorbance signal as the output. The chemical inputs of Bi 3+ and C2 O4 2- in a sequential system produce an output which mimics the operation of a security keypad lock. This study provides a practical application for the sensing of C2 O4 2− ions in vegetable and urine samples by the construction of the supramolecular system.