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An efficient naphthalimide based receptor for selective detection of Hg<sup>2+</sup>and Pb<sup>2+</sup>ions <sup>#</sup>

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Title An efficient naphthalimide based receptor for selective detection of Hg2+and Pb2+ions #
 
Creator Patil, Pramod D Jawale
Wagalgave, Sopan M
Kobaisi, Mohammad Al
Birajdar, Shailesh S
Bhosale, Rajesh S
Ingle, Rajita D
Pawar, Rajendra P
Bhosale, Sheshanath V
Bhosale, Sidhanath V
 
Subject Benzothiazole
colorimetric
naphthaleneimide
pyrrolidine
sensor
 
Description 1353-1361
Naphthalimide based receptor 1 with N-substituted benzothiazole and pyrrolidine subunit is designed, synthesized, and
characterized using FT-IR,1H and 13C NMR spectroscopy and mass spectrometry techniques. The receptor 1 exhibits
prominent optical response for Hg2+and Pb2+ions allowing the detection of these ions in acetonitrile (ACN). The formation
of the receptor 1:cation complexes have been investigated using UV-Vis and fluorescence emission titration. Further, the
selectivity of the receptor 1towards Hg2+and Pb2+ ions on the presence of various interfering cations such as Mg2+, Ba2+,
Ni2+, Co2+, Cu2+, Ag2+, Fe2+, Fe3+and Cr3+ has been confirmed by UV-Vis and fluorescence spectroscopy. The binding
constant between receptor 1 and Hg2+ and Pb2+ was estimated by Benesi-Hildebrand plot and equations. The binding
constants have been found to be Ka= 3.43286  10−6 and Ka= 2.84079  10−6 M for Hg2+ and Pb2+, respectively. The limit of
detection (LOD) for Hg2+and Pb2+by receptor 1are down to 7.44  10−10 M and 1.26  10−9 M, respectively. In addition,
Job’s plot analysis reveals 1:2 binding stoichiometry between the receptor 1 and Pb2+ and Hg2+ cations.
 
Date 2021-10-20T10:53:13Z
2021-10-20T10:53:13Z
2021-10
 
Type Article
 
Identifier 0975-0983(Online); 0376-4699(Print)
http://nopr.niscair.res.in/handle/123456789/58324
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJC-B Vol.60B(10) [October 2021]