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

  1. Alves-Iglesias, Yeneva 12
  2. Bermejo-Barrera, Pilar 2
  3. García-Deibe, Ana María 1
  4. Fondo, Matilde 1
  5. Sanmartín-Matalobos, Jesús 1
  1. 1 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
  2. 2 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
Revista:
Chemistry proceedings

Ano de publicación: 2022

Volume: 12

Número: 92

Tipo: Artigo

DOI: 10.3390/ECSOC-26-13561 GOOGLE SCHOLAR lock_openAcceso aberto editor

Obxectivos de Desenvolvemento Sustentable

Resumo

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 immobilizedH2SB onto cellulose paper by forming an amide bond, which results from the condensation of acarboxylic acid and an amine. Three dominant signals located around 270, 330, and 420 nm in thediffuse reflectance spectrum of the H2SB-modified paper demonstrated its immobilization. A lineardecrease can be observed in the absorbance of the 270 nm band with the increase of the CdSe-CysQDs 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 hasbeen demonstrated with 1H NMR, ATR-FTIR, and UV-Vis spectroscopy.

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