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10.3390/org4030032
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Article

Stimuli-Sensitive Pyrenylated Hydrogels as Optical Sensing Platform for Multiple Metal Ions

by
Dipen Biswakarma
1,2,
Nilanjan Dey
3 and
Santanu Bhattacharya
1,4,*
1
Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India
2
Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012, India
3
Department of Chemistry, Birla Institute of Technology and Science Pilani, Hyderabad 500078, India
4
Indian Institute of Science Education and Research Tirupati, Tirupati 517507, India
*
Author to whom correspondence should be addressed.
Organics 2023, 4(3), 447-458; https://doi.org/10.3390/org4030032
Submission received: 29 March 2023 / Revised: 7 June 2023 / Accepted: 21 July 2023 / Published: 4 September 2023
(This article belongs to the Special Issue Aromatic Heterocycles: A Wonderful Pool of Organic Materials)
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Abstract

In the present work, we report a thermoresponsive hydrogel formed by the self-assembly of compounds 1 and 2 Milli Q water. Both hydrogels showed thixotropic behavior. Atomic force microscopy (AFM) studies confirm the fiber-like microstructure of compounds 1 and 2, but denser fibers were observed in the case of compound 1. The hydrogel formed by compound 1 detected Cu2+, Fe3+, and Hg2+, whereas the hydrogel of 2 showed a change in the optical signal, specifically upon adding Cu2+ and Hg2+. Mechanistically, adding metal ions to the hydrogel resulted in the formation of a (1:1) complex with Fe3+ and Hg2+ and (2:1) with Cu2+. The detection of metal ions has also been achieved in real-life samples, such as in tap water. Low-cost portable gel-coated paper strips have also been developed for the onsite detection of these metal ions.
Keywords: thermoresponsive hydrogel; multiplexing; optical sensing; self-assembly; real-life samples thermoresponsive hydrogel; multiplexing; optical sensing; self-assembly; real-life samples
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MDPI and ACS Style

Biswakarma, D.; Dey, N.; Bhattacharya, S. Stimuli-Sensitive Pyrenylated Hydrogels as Optical Sensing Platform for Multiple Metal Ions. Organics 2023, 4, 447-458. https://doi.org/10.3390/org4030032

AMA Style

Biswakarma D, Dey N, Bhattacharya S. Stimuli-Sensitive Pyrenylated Hydrogels as Optical Sensing Platform for Multiple Metal Ions. Organics. 2023; 4(3):447-458. https://doi.org/10.3390/org4030032

Chicago/Turabian Style

Biswakarma, Dipen, Nilanjan Dey, and Santanu Bhattacharya. 2023. "Stimuli-Sensitive Pyrenylated Hydrogels as Optical Sensing Platform for Multiple Metal Ions" Organics 4, no. 3: 447-458. https://doi.org/10.3390/org4030032

APA Style

Biswakarma, D., Dey, N., & Bhattacharya, S. (2023). Stimuli-Sensitive Pyrenylated Hydrogels as Optical Sensing Platform for Multiple Metal Ions. Organics, 4(3), 447-458. https://doi.org/10.3390/org4030032

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