A biocompatible hydrogel as a template for oxidative decomposition reactions: a chemodosimetric analysis and <i>in vitro</i> imaging of hypochlorite

Biswakarma, Dipen; Dey, Nilanjan; Bhattacharya, Santanu

doi:10.1039/d1sc05424d

Cited by 15 publications

(16 citation statements)

References 84 publications

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“…1 formed a transparent hydrogel (Figure b), and an opaque hydrogel was observed for 2 (Figure c). Both the gels showed a thermoreversible and thixotropic behavior . It is well known that pyrenyl compounds interact with the π-surface of the GO by the favorable long-range π–π stacking interactions.…”

Section: Results and Discussionmentioning

confidence: 95%

Hydrogel Nanocomposite Towards Optical Sensing of Spermine in Biomedical and Real-Life Food Samples and Remediation of Toxic Dyes from Wastewater

2023

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Nanocomposites such as graphene oxide (GO) have been incorporated into hydrogels to enhance conventional hydrogels' properties and develop new functions. Unique and strong molecular interactions between GO and low molecular weight gelators allow the fabrication of various functional hydrogels suitable for different applications. In the present study, we report a stable and soft nanocomposite hydrogel comprising a pyrene-based chiral amphipath having an amino acid (L-phenylalanine) core with pendant oligo-oxyethylene hydrophilic chains and GO. The mechanical and viscoelastic properties of the nanocomposite hydrogel were thoroughly studied using various spectroscopic, microscopic, and mechanical techniques. Even without GO, native hydrogels could form a self-supported thermoreversible and thixotropic hydrogel composed of the fibrillar network. Unlike native hydrogels, the morphological investigation of nanocomposite gels shows the presence of cross-linked nanosheet-like structures. The combined effect of π−π stacking and H-bonding interactions is the driving force for the formation of such composite hydrogels. Moreover, the nanocomposite hydrogels possess significantly superior mechanical stiffness than the native hydrogels. Interestingly, the thixotropic properties observed with the parent gel were retained even in the presence of carbon nanomaterials (GO). The nanocomposite hydrogel could be employed in the optical sensing of a biogenic polyamine, spermine, resulting in a visible gel-to-sol transition. The superior electrostatic interaction between the GOs and spermine molecules might have led to the release of entrapped fluorogenic dyes from the hydrogel network and a turn-on emission response. The sensory system was employed to analyze spermine content in human urine samples and decomposed food items. A gel-coated paper strip was also developed for onsite detection of the spermine. The nanocomposite hydrogel was further utilized to remove toxic organic dyes such as methylene blue (MB) and rhodamine B (RhB) from the aqueous media. The nanocomposite hydrogel thus showed excellent dye removal capabilities and was also found to be recyclable. Calculations of different mechanical parameters suggest that the dye removal efficiency of the nanocomposite hydrogel was better for MB than for RhB.

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Section: Results and Discussionmentioning

confidence: 95%

Hydrogel Nanocomposite Towards Optical Sensing of Spermine in Biomedical and Real-Life Food Samples and Remediation of Toxic Dyes from Wastewater

2023

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“…Changing the anchors and groups attached to the pyrenes would allow the detection of other oxidizable substances. However, this hydrolysis caused a sol reaction, which was detrimental to the stability of the CFHs [110] . Interestingly, 8-HQ, described in Section 2 , is weakly fluorescent, and complexes between 8-HQ and metal ions can enhance the fluorescence by blocking the ESIPT channel [111] .…”

Section: Hydrogels Loaded With Compound Fluorophoresmentioning

confidence: 99%

Application of optical hydrogels in environmental sensing

Yang

Sarkar

Xie

et al. 2023

Preprint

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The ever-increasing complexity of environmental pollutants urgently warrants the development of new detection technologies. In this context, sensors based on the optical properties of hydrogels enabling fast and easy in situ detection are attracting increasing attention. Herein, the target recognition and sensing mechanisms of two main types of optical hydrogels (OHs) are reviewed and discussed: photonic crystal hydrogels (PCHs) and fluorescent hydrogels (FHs). For PCHs, the environmental stimulus response, target receptors, inverse opal structures, and molecular imprinting techniques related to PCHs are reviewed and summarized. Furthermore, the different types of fluorophores (i.e., compound probes, biomacromolecules, quantum dots, and luminescent microbes) of FHs are summarized. Finally, the data from 138 papers about different OHs are extracted for secondary statistical analysis. The detection performance and potential of various OH types in different environmental pollutant detection scenarios are evaluated, and compared them to those obtained using the standard detection method. Based on this analysis, some possible development directions are proposed, including the fusion of various OHs, introduction of more hydrogel technologies from the biomedical field to the environmental pollutant detection field, and development of multifunctional sensor arrays.

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“…Therefore, over the past decade, chemical-based information encryption strategies are attracting increasing attention for meeting the challenge of information recording and encryption. − Among the relative encryption materials, fluorescent materials have aroused extensive attention due to the intelligence capability to sense, store, analyze, and respond to the external stimuli (solvents, ions, light, molecules, mechanical force, etc. ), making these materials have potential applications in sensors, bioimaging, displays, optical recording, and information security. − Meanwhile, fluorescence response endows the luminescent materials with intelligence, which can be displayed by an optical signal output accompanying with the obvious luminescence change such as quenching, enhancement, and emission peak shift toward the external stimuli. − Using the fluorescence response mechanism of fluorescent materials toward the external stimuli, chemical-based information security can realize the information storage, encryption, decryption, and anticounterfeiting benefiting from the superior selectivity and unique fluorescence response and therefore strengthen the information security level. In recent years, smart hydrogels, as one of the representative fluorescent materials, are also employed to improve the information security.…”

Section: Introductionmentioning

confidence: 99%

Dual Lewis Acid- and Base-Responsive Terpyridine-Based Hydrogel: Programmable and Spatiotemporal Regulation of Fluorescence for Chemical-Based Information Security

Chen

Pang

et al. 2023

Inorg. Chem.

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A huge amount of data inundated in our daily life; there is an ever-increasing need to develop a new strategy of information encryption–decryption–erasing. Herein, a polymeric DCTpy/PAM hydrogel has been fabricated to store information via controllable Eu3+/Zn2+ ionoprinting for hierarchical and multidimensional information decryption. Eu3+ and Zn2+ have a competition and dynamic interaction toward DCTpy under NH3 stimuli in the polymeric DCTpy/PAM hydrogel network. The Eu(III)/Zn(II)@DCTpy/PAM hydrogel exhibits light red fluorescence of Eu3+ due to the antenna effect. Upon the addition of NH3, dissociation of the Eu3+–DCTpy complex takes place, and the Zn(II)/DCTpy/NH3 complex is formed with both ICT (intramolecular charge-transfer) and PET (photo-induced electron-transfer) process characteristics that exhibits yellow emission color. Subsequently, HCl can quench the fluorescence of the resulting hydrogel. By integrating transparency, adhesiveness, and programmable stimuli responsiveness of the hydrogel blocks in to one system, complex, multistage, and time-controlled information storage–encryption–decryption–erasing in sequence with multidimensions is illustrated via the molecule diffusion method. This work provides a novel and representative strategy in fabricating information encryption–decryption-erasing materials with high capacity and complexity by a simple terpyridine-based hydrogel.

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A biocompatible hydrogel as a template for oxidative decomposition reactions: a chemodosimetric analysis and in vitro imaging of hypochlorite

Abstract: The self-assembly properties of new biocompatible, thermoreversible fluorescent hydrogels, composed of amino acid residues have been reported. A unique gel-to-sol transition is triggered by chemodosimetric interaction in the presence of hypochlorite.

Cited by 15 publications

References 84 publications

Hydrogel Nanocomposite Towards Optical Sensing of Spermine in Biomedical and Real-Life Food Samples and Remediation of Toxic Dyes from Wastewater

Hydrogel Nanocomposite Towards Optical Sensing of Spermine in Biomedical and Real-Life Food Samples and Remediation of Toxic Dyes from Wastewater

Application of optical hydrogels in environmental sensing

Dual Lewis Acid- and Base-Responsive Terpyridine-Based Hydrogel: Programmable and Spatiotemporal Regulation of Fluorescence for Chemical-Based Information Security

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