Abstract
A fluorescent sensor for the detection of trithiocyanuric acid (TCA)and Hg2+ was developed based on competitive interactions: non-covalent stacking between g-C3N4 and TCA vs coordinative interaction between TCA and Hg2+. Electrostatic simulations were used to evaluate the interactions and help describe the detection mechanism. Moreover, normalized 2D fluorescence contour plots have been used to understand the fluorescence phenomenon. When TCA was added into a g-C3N4 nanosheet solution free of Hg2+, TCA interacted with g-C3N4 nanosheets via hydrogen bonding and π-π interactions, resulting in fluorescence quenching of the g-C3N4 nanosheets. However, upon the addition of Hg2+, the fluorescence of the TCA-g-C3N4 nanosheet hybrid system was restored, due to coordination of Hg2+ with TCA through the S atoms, breaking the TCA-g-C3N4 stacking interaction. Our results provide a new approach for the design of multifunctional nanosensors suitable for the detection of environmental pollutants.
| Original language | English |
|---|---|
| Article number | 107476 |
| Journal | Dyes and Pigments |
| Volume | 170 |
| Early online date | 12 Apr 2019 |
| DOIs | |
| Publication status | Published - 1 Nov 2019 |
Keywords
- Dye sensor
- Fluorescent sensor
- Functional materials
- Graphitic carbon nitride
- Mercury sensing
ASJC Scopus subject areas
- Chemical Engineering(all)
- Process Chemistry and Technology
Cite this
A practical graphitic carbon nitride (g-C3N4)based fluorescence sensor for the competitive detection of trithiocyanuric acid and mercury ions. / Li, Meng; Wang, Bo; An, Xufei; Li, Zhiyong; Zhu, Hongtao; Mao, Boyang; Calatayud, David G.; James, Tony D.
In: Dyes and Pigments, Vol. 170, 107476, 01.11.2019.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - A practical graphitic carbon nitride (g-C3N4)based fluorescence sensor for the competitive detection of trithiocyanuric acid and mercury ions
AU - Li, Meng
AU - Wang, Bo
AU - An, Xufei
AU - Li, Zhiyong
AU - Zhu, Hongtao
AU - Mao, Boyang
AU - Calatayud, David G.
AU - James, Tony D.
PY - 2019/11/1
Y1 - 2019/11/1
N2 - A fluorescent sensor for the detection of trithiocyanuric acid (TCA)and Hg2+ was developed based on competitive interactions: non-covalent stacking between g-C3N4 and TCA vs coordinative interaction between TCA and Hg2+. Electrostatic simulations were used to evaluate the interactions and help describe the detection mechanism. Moreover, normalized 2D fluorescence contour plots have been used to understand the fluorescence phenomenon. When TCA was added into a g-C3N4 nanosheet solution free of Hg2+, TCA interacted with g-C3N4 nanosheets via hydrogen bonding and π-π interactions, resulting in fluorescence quenching of the g-C3N4 nanosheets. However, upon the addition of Hg2+, the fluorescence of the TCA-g-C3N4 nanosheet hybrid system was restored, due to coordination of Hg2+ with TCA through the S atoms, breaking the TCA-g-C3N4 stacking interaction. Our results provide a new approach for the design of multifunctional nanosensors suitable for the detection of environmental pollutants.
AB - A fluorescent sensor for the detection of trithiocyanuric acid (TCA)and Hg2+ was developed based on competitive interactions: non-covalent stacking between g-C3N4 and TCA vs coordinative interaction between TCA and Hg2+. Electrostatic simulations were used to evaluate the interactions and help describe the detection mechanism. Moreover, normalized 2D fluorescence contour plots have been used to understand the fluorescence phenomenon. When TCA was added into a g-C3N4 nanosheet solution free of Hg2+, TCA interacted with g-C3N4 nanosheets via hydrogen bonding and π-π interactions, resulting in fluorescence quenching of the g-C3N4 nanosheets. However, upon the addition of Hg2+, the fluorescence of the TCA-g-C3N4 nanosheet hybrid system was restored, due to coordination of Hg2+ with TCA through the S atoms, breaking the TCA-g-C3N4 stacking interaction. Our results provide a new approach for the design of multifunctional nanosensors suitable for the detection of environmental pollutants.
KW - Dye sensor
KW - Fluorescent sensor
KW - Functional materials
KW - Graphitic carbon nitride
KW - Mercury sensing
UR - http://www.scopus.com/inward/record.url?scp=85066328346&partnerID=8YFLogxK
U2 - 10.1016/j.dyepig.2019.04.021
DO - 10.1016/j.dyepig.2019.04.021
M3 - Article
VL - 170
JO - Dyes and Pigments
JF - Dyes and Pigments
SN - 0143-7208
M1 - 107476
ER -