A Quinoxaline−Naphthaldehyde Conjugate for Colorimetric Determination of Copper Ion
Sutapa Sahu,
Yeasin Sikdar,
Riya Bag,
Michael G. B. Drew,
José P. Cerón-Carrasco,
Sanchita Goswami
Affiliations
Sutapa Sahu
Department of Chemistry, University of Calcutta, 92, A.P.C. Road, Kolkata 700009, India
Yeasin Sikdar
Department of Chemistry, University of Calcutta, 92, A.P.C. Road, Kolkata 700009, India
Riya Bag
Department of Chemistry, University of Calcutta, 92, A.P.C. Road, Kolkata 700009, India
Michael G. B. Drew
Department of Chemistry, University of Reading, Whiteknights, Reading RG6 6AD, UK
José P. Cerón-Carrasco
Centro Universitario de la Defensa, Academia General del Aire, Universidad Politécnica de Cartagena, C/Coronel López Peña S/N, Santiago de La Ribera, 30720 Murcia, Spain
Sanchita Goswami
Department of Chemistry, University of Calcutta, 92, A.P.C. Road, Kolkata 700009, India
This work facilitates detection of bivalent copper ion by a simple Schiff base probe QNH based on a quinoxaline−naphthaldehyde framework. The detailed study in absorption spectroscopy and theoretical aspects and crystal study of the probe and probe−copper complex has been discussed. The detection limit of the probe in the presence of Cu2+ is 0.45 µM in HEPES−buffer/acetonitrile (3/7, v/v) medium for absorption study. The reversibility of the probe−copper complex has been investigated by EDTA. The selective visual detection of copper has been established also in gel form.
