Immobilization on Cellulose Paper of a Chemosensor for CdSe-Cys QDs

Yeneva Alves-Iglesias; Pilar Bermejo-Barrera; Ana María García-Deibe; Matilde Fondo; Jesús Sanmartín-Matalobos

doi:10.3390/ecsoc-26-13561

Chemistry Proceedings (Nov 2022)

Immobilization on Cellulose Paper of a Chemosensor for CdSe-Cys QDs

Yeneva Alves-Iglesias,
Pilar Bermejo-Barrera,
Ana María García-Deibe,
Matilde Fondo,
Jesús Sanmartín-Matalobos

Affiliations

Yeneva Alves-Iglesias: Coordination and Supramolecular Chemistry Group (Suprametal), Institute of Materials (iMATUS), Department of Inorganic Chemistry, Faculty of Chemistry, Universidade de Santiago de Compostela, Avenida das Ciencias s/n, 15782 Santiago de Compostela, Spain
Pilar Bermejo-Barrera: Trace Element, Speciation and Spectroscopy Group (GETEE)—Institute of Materials (iMATUS), Department of Analytical Chemistry, Nutrition and Bromatology, Faculty of Chemistry, Universidade de Santiago de Compostela, Avenida das Ciencias, s/n, 15782 Santiago de Compostela, Spain
Ana María García-Deibe: Coordination and Supramolecular Chemistry Group (Suprametal), Institute of Materials (iMATUS), Department of Inorganic Chemistry, Faculty of Chemistry, Universidade de Santiago de Compostela, Avenida das Ciencias s/n, 15782 Santiago de Compostela, Spain
Matilde Fondo: Coordination and Supramolecular Chemistry Group (Suprametal), Institute of Materials (iMATUS), Department of Inorganic Chemistry, Faculty of Chemistry, Universidade de Santiago de Compostela, Avenida das Ciencias s/n, 15782 Santiago de Compostela, Spain
Jesús Sanmartín-Matalobos: Coordination and Supramolecular Chemistry Group (Suprametal), Institute of Materials (iMATUS), Department of Inorganic Chemistry, Faculty of Chemistry, Universidade de Santiago de Compostela, Avenida das Ciencias s/n, 15782 Santiago de Compostela, Spain

DOI: https://doi.org/10.3390/ecsoc-26-13561
Journal volume & issue: Vol. 12, no. 1
p. 92

Abstract

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The Schiff base ligand H2SB derived from the condensation of N-(2-aminobenzyl)-5-(dimethylamino)naphthalene-1-sulfonamide with 4-formyl-3-hydroxybenzoic acid has been investigated as a chemosensor for the detection of CdSe-Cys QDs in water samples. We immobilized H2SB onto cellulose paper by forming an amide bond, which results from the condensation of a carboxylic acid and an amine. Three dominant signals located around 270, 330, and 420 nm in the diffuse reflectance spectrum of the H2SB-modified paper demonstrated its immobilization. A linear decrease can be observed in the absorbance of the 270 nm band with the increase of the CdSe-Cys QDs concentration from 100 ppb to 2 ppm. The LOD and LOQ show values of 245 and 815 ppb, respectively. An interaction via metal–ligand coordination between CdSe-Cys QDs and H2SB has been demonstrated with 1H NMR, ATR-FTIR, and UV-Vis spectroscopy.

Published in Chemistry Proceedings

ISSN: 2673-4583 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry
Website: https://www.mdpi.com/journal/chemproc

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