Strong luminescence of carbon dots induced by acetone passivation: efficient sensor for a rapid analysis of two different pollutants

Angelina Cayuela; M Laura Soriano; Miguel Valcárcel

doi:10.1016/j.aca.2013.10.031

Strong luminescence of carbon dots induced by acetone passivation: efficient sensor for a rapid analysis of two different pollutants

Anal Chim Acta. 2013 Dec 4:804:246-51. doi: 10.1016/j.aca.2013.10.031. Epub 2013 Oct 22.

Authors

Angelina Cayuela¹, M Laura Soriano, Miguel Valcárcel

Affiliation

¹ Department of Analytical Chemistry, Marie Curie Building, Campus de Rabanales, University of Córdoba, E-14071 Córdoba, Spain.

PMID: 24267089
DOI: 10.1016/j.aca.2013.10.031

Abstract

The important photoluminescence enhancement found in Carbon Dots (CDs) obtained from carbonaceous nanomaterials when passivating with acetone is shown in this paper, in which this type of passivation has not been reported previously. Analytical fluorescent assays were performed with the selected CDs using two different pollutants as target analytes. The results show that the optimal conditions for detecting 2,4-dinitrophenol (DNP) were at pH 3.5 while in case of 2-amino-3,4,8-trimethyl-3H-imidazo[4,5-f]quinoxaline (4,8-DiMeIQx) were found at physiological pH. The fascinating ability of CDs to interact with certain molecules under certain conditions gave rise to explore some useful applications for a quick detection of contaminants by simply monitoring the photoluminescence of CDs as shown in this article.

Keywords: 2,4-dinitrophenol; 2-amino-3,4,8-trimethyl-3H-imidazo[4,5-f]quinoxaline; 2-amino-3,8-dimethylimidazo[4,5-f]quinoxaline; 4,8-DiMeIQx; Acetone passivation; C(60); CDs; Carbon Dots; DNP; Dinitrophenol; Heterocyclic amine; MWCNTs; MeIQx; Nanosensor; PL; Photoluminescence enhancement; QDs; SWCNTs; TEM; TL; buckminsterfullerene; multi-wall carbon nanotubes; photoluminescent; quantum dots; single-wall carbon nanotubes; threshold limit; transmission electron microscope.