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Thiourea Functionalised Receptor for Selective Detection of Mercury Ions and its Application in Serum Sample
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Thiourea Functionalised Receptor for Selective Detection of Mercury Ions and its Application in Serum Sample
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Journal Article
Thiourea Functionalised Receptor for Selective Detection of Mercury Ions and its Application in Serum Sample
2025
Overview
A thiourea functionalised fluorescent probe 1-phenyl-3-(pyridin-4-yl)thiourea was synthesized and utilised as a fluorescent turn-on chemosensor for the selective recognition of Hg
2+
ion over competitive metal ions including Na
+
, Mn
2+
, Li
+
, Cr
2+
, Ni
2+
, Ca
2+
, Cd
2+
, Mg
2+
, K
+
, Co
2+
, Cu
2+
, Zn
2+
, Al
3+
and Fe
2+
ions based on the inter-molecular charge transfer (ICT). Intriguingly, the receptor demonstrated unique sensing capabilities for Hg
2+
in DMSO: H
2
O (10:90, v/v). The addition of Hg
2+
ions to the sensor resulted in a blue shift in the absorption intensity and also enhancement in fluorescence intensity at 435 nm. Fluorescence emission intensity increased linearly with Hg
2+
concentration ranging from 0 to 80 µL. The detection limit and binding constant were determined as 0.134 × 10
–6
M and 1.733 × 10
7
M
−1
, respectively. The sensing behavior of Hg
2+
was further examined using DLS, SEM and FTIR. The probe could detect Hg
2+
ions across a wide pH range. Furthermore, the receptor
L
demonstrated good sensing performance for Hg
2+
in bovine serum albumin and actual water samples.
Publisher
Springer US,Springer Nature B.V
