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Int J Biol Macromol

Title:		Quinoxaline-probe embedded injectable fluorogenic hydrogels: Comparative detection of mesitylene in guar gum and i-carrageenan hydrogels
Author(s):		Ghosh D; Basak M; Deka D; Das G;
Address:		"Centre for the Environment, Indian Institute of Technology Guwahati, Assam 781039, India. Department of Chemistry, Indian Institute of Technology Guwahati, Assam 781039, India. Centre for the Environment, Indian Institute of Technology Guwahati, Assam 781039, India; Department of Chemistry, Indian Institute of Technology Guwahati, Assam 781039, India. Electronic address: gdas@iitg.ac.in"
Journal Title:		Int J Biol Macromol
Year:		2023
Volume:		20221230
Issue:
Page Number:		615 - 623
DOI:		10.1016/j.ijbiomac.2022.12.310
ISSN/ISBN:		1879-0003 (Electronic) 0141-8130 (Linking)
Abstract:		"The innovation of novel chemosensor probes for the recognition of trace volatile organic compounds is critical due to their hazardous effect on the environment and human health. A nitro-group integrated quinoxaline probe with a profound discriminative fluorescence 'turn-on' response to mesitylene was fabricated into guar gum and i-carrageenan, two biopolymer-based hydrogel matrices, to develop compact, portable fluorogenic hydrogel sensors and assess their fluorescence properties. A comparative characterization-based analysis of native, probe-associated, and probe-analyte-associated hydrogels, (comprising of FT-IR, XRD, TGA) was investigated to ascertain the overall compatibility of the hydrogel-based sensors for use as a smart rapid detection tool. Dynamic rheological measurements also validated the mechanical stability and robustness of the developed hydrogel matrices. Fluorescence spectroscopic investigations yielded promising results of 0.15 ppm limit of detection (LOD) in guar gum and 0.29 ppm LOD in i-carrageenan hydrogels respectively. FESEM and Fluorescence microscopy studies represented the morphological variations of the hydrogel sensors on interaction with mesitylene. The practical feasibility of the chemosensor in hydrogel form for mesitylene detection in the vapor phase was also explored. Probe-embedded hydrogels with injectable property was shown, depicting its use as security ink for information encryption functions. This approach of incorporating chemosensors into biobased hydrogel networks has the potential to broaden its opportunities in the field of chemical, biomedical, and environmental sensing sectors"
Keywords:		"Humans Carrageenan/chemistry *Hydrogels/chemistry *Quinoxalines Spectroscopy, Fourier Transform Infrared Carrageenan Guar gum Hydrogel Mesitylene Quinoxaline;"
Notes:		"MedlineGhosh, Debolina Basak, Megha Deka, Deepmoni Das, Gopal eng Netherlands 2023/01/03 Int J Biol Macromol. 2023 Feb 28; 229:615-623. doi: 10.1016/j.ijbiomac.2022.12.310. Epub 2022 Dec 30"