A handy and accessible tool for identification of Sn(II) in toothpaste

Shampa Kundu; Khai-Nghi Truong; Shrabani Saha; Kari Rissanen; Prithidipa Sahoo

doi:10.1038/s41598-022-06299-0

A handy and accessible tool for identification of Sn(II) in toothpaste

Sci Rep. 2022 Feb 10;12(1):2305. doi: 10.1038/s41598-022-06299-0.

Authors

Shampa Kundu¹, Khai-Nghi Truong², Shrabani Saha¹, Kari Rissanen², Prithidipa Sahoo³

Affiliations

¹ Department of Chemistry, Visva-Bharati University, Santiniketan, W.B., 731235, India.
² Department of Chemistry, University of Jyvaskyla, Survontie 9 B, P.O. Box 35, 40014, Jyväskylä, Finland.
³ Department of Chemistry, Visva-Bharati University, Santiniketan, W.B., 731235, India. prithidipa@hotmail.com.

Abstract

An easily accessible colorimetric probe, a carbazole-naphthaldehyde conjugate (CNP), was successfully prepared for the selective and sensitive recognition of Sn(II) in different commercially-available toothpaste and mouth wash samples. The binding mechanism of CNP for Sn²⁺ was confirmed by UV-Vis, ¹H, and ¹³C NMR titrations. The proposed sensing mechanism was supported by quantum chemical calculations. Selective detection of Sn(II) in the nanomolar range (85 nM), among other interfering metal ions, makes it exclusive. Moreover, Sn²⁺ can be detected with a simple paper strip from toothpaste, which makes this method handy and easily accessible. The potential application of this system for monitoring Sn²⁺ can be used as an expedient tool for environmental and industrial purposes.

Publication types

Research Support, Non-U.S. Gov't