Preparation of polyvinyl alcohol reinforced with microcrystalline cellulose to function as test strips immobilized with a hydrazone chromophore for colorimetric identification of toxic ammonia

Al‐Qahtani, Salhah D.; Habeebullah, Turki M.; Alsoliemy, Amerah; Alzahrani, Hanan; Shah, Reem; Alfi, Alia Abdulaziz; El‐Metwaly, Nashwa M.

doi:10.1016/j.matchemphys.2021.125218

Cited by 19 publications

(16 citation statements)

References 36 publications

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“…As anticipated, a distinctive solvatochromic performance was monitored in both protic and non‐protic solvents. Protic solvents function as H‐bond donors to partially protonate the nitrogen atom on the quinoline moiety of the tricyanofuranhydrazone dye [21] . This partial protonation of nitrogen atom on quinoline moiety results in charge reduction leading to hypsochromic shift.…”

Section: Resultsmentioning

confidence: 99%

“…Protic solvents function as H-bond donors to partially protonate the nitrogen atom on the quinoline moiety of the tricyanofuranhydrazone dye. [21] This partial protonation of nitrogen atom on quinoline moiety results in charge reduction leading to hypsochromic shift. In a non-protic solvent; however, this H-bond donor effect should be negligible.…”

Section: Solvatochromic Propertiesmentioning

confidence: 99%

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Metallochromic Hydrazone‐Based Chemosensor with Application in a Colorimetric Paper Strip for Selective Detection of Cu²⁺

et al. 2022

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A new tricyanofuranhydrazone‐based colorimetric chemosensor (TCFH) was synthesized and immobilized onto paper strips for selective detection of Cu2+ in aqueous environments. The synthesis strategy of TCFH involved an azo‐coupling process between the diazonium salt of 8‐aminoquinoline and an active methyl‐bearing tricyanofuran (TCF) heterocyclic moiety. Due to intramolecular charge transfer, TCFH chromophore demonstrated pronounced solvatochromism depending on the solvent polarity. Changes in both color and UV‐Vis absorption spectra demonstrated by the developed chemosensor proved that TCFH can be utilized to detect Cu2+ in the presence of other competing metallic cations and anions. The synthesized TCFH probe, which contains a hydrazone recognition moiety, demonstrates dramatic solvatochromic activity and high selectivity at the microlevel of copper ions with a color shift from yellow to purple. Moreover, test strips of TCFH were successfully developed and applied for the detection of copper ions at different concentrations in aqueous media. The colorimetric properties of the prepared TCFH‐immobilized paper strips were investigated by CIE Lab chromogenic parameters, colorimetric strength (K/S) and UV‐Vis absorbance spectra. The best detection of Cu2+ was achieved in the pH range of 6.6–7.4 demonstrating an immediate color switch relying on the total content of Cu2+. SEM was applied to characterize the deposition of tricyanofuranhydrazone onto the surface of the paper strip.

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Section: Resultsmentioning

confidence: 99%

Section: Solvatochromic Propertiesmentioning

confidence: 99%

Metallochromic Hydrazone‐Based Chemosensor with Application in a Colorimetric Paper Strip for Selective Detection of Cu²⁺

et al. 2022

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“…As displayed in Figure 3A, raising the overall amount of MFC has a beneficial impact on the film strength when compared to a pure film of PVA. [ 33 ] This could be attributed to the compatibility between PVA and MFC, which improved the interactions between them. Improved mechanical characteristics were achieved by immobilizing the QHTCF sensor within the PVA‐MFC strip (Figure 3).…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…They have been used as disperse dyestuff and antibacterial compounds for hydrophobic fabrics. [33] Diisopropyl fluorophosphate (DFP) has been described as an efficient nerve mimic with the ability to inhibit acetylcholinesterase (AChE). [34] Herein, we report the development of microporous colorimetric sensing tool for onsite identification of nerve agent mimics.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of microfibrillated cellulose/polyvinyl alcohol test strip integrated with novel chemosensor for colorimetric determination of diisopropyl fluorophosphate

et al. 2022

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Exposure to the odorless or colorless nerve agents can result in organ paralysis, failure, or even death. Novel nanocomposite‐based microporous strips that can be used with the naked eye to detect diisopropyl fluorophosphate (DFP) nerve agent mimic within a few seconds have been developed. A simple preparation procedure was used to prepare novel quinoline‐bearing hydrazone‐type tricyanofuran (QHTCF) chromophore via an azo‐coupling of 8‐aminoquinoline diazonium salt with the active methyl‐containing tricyanofuran. The chemical structure of QHTCF was inspected with FTIR, 1H/13CNMR, and elemental analysis. An environmentally friendly procedure was employed to prepare microfibrillated cellulose from sugarcane bagasse agricultural waste that has been one of the most well‐known solid pollutants worldwide. Therefore, it has been highly significant to find out a simple procedure to exchange sugarcane bagasse into valuable materials. Microfibrillated cellulose/polyvinyl alcohol/hydrazone (PVA‐MFC‐H) composites were prepared using different concentrations of QHTCF chromophore. With an increase in DFP concentration, the absorption intensity of the QHTCF‐containing nanocomposite rose from 426 to 562 nm. A wide range of detection limit was monitored for DFP using the current PVA‐MFC‐H sensor strip. The CIE Lab measurements demonstrated a yellow‐to‐purple color shift of PVA‐MFC‐H upon exposure to DFP. The current PVA‐MFC‐H strip demonstrated a detection limit for DFP in the range of 25–300 ppm. The current sensors were tested for their morphologies, fiber crystallinity, thermal stability, and mechanical characteristics.

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Chiral Metal‐Organic Frameworks with Spectroscopic Methods: Towards Chemical Sensor Devices

Hubber,

Hua

2024

Chemistry A European J

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Chiral Metal‐Organic Frameworks (CMOFs) are a rapidly growing field reflecting their potential as selective and sensitive chemical sensors for chiral analytes. The highly tuneable nature of CMOFs enables the size, shape, and non‐covalent interactions to be optimised towards specific analytes to engender strong intermolecular interactions and sensing responses. While CMOFs as chiral chemical sensor devices have been explored with electrochemical methods including differential pulse voltammetry (DPV), bipolar and chemiresistive sensing techniques, the CMOFs as chiral chemical sensors using spectroscopic methods has received significantly less attention. This review examines the synthesis of CMOFs for chemical sensors with spectroscopic methods such as photoluminescence, circular dichroism, and solid‐state nuclear magnetic resonance with a view towards their incorporation into chemical sensor devices. Future directions of the field are highlighted for the generation of functional devices.

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Preparation of polyvinyl alcohol reinforced with microcrystalline cellulose to function as test strips immobilized with a hydrazone chromophore for colorimetric identification of toxic ammonia

Cited by 19 publications

References 36 publications

Metallochromic Hydrazone‐Based Chemosensor with Application in a Colorimetric Paper Strip for Selective Detection of Cu²⁺

Metallochromic Hydrazone‐Based Chemosensor with Application in a Colorimetric Paper Strip for Selective Detection of Cu²⁺

Preparation of microfibrillated cellulose/polyvinyl alcohol test strip integrated with novel chemosensor for colorimetric determination of diisopropyl fluorophosphate

Chiral Metal‐Organic Frameworks with Spectroscopic Methods: Towards Chemical Sensor Devices

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Preparation of polyvinyl alcohol reinforced with microcrystalline cellulose to function as test strips immobilized with a hydrazone chromophore for colorimetric identification of toxic ammonia

Cited by 19 publications

References 36 publications

Metallochromic Hydrazone‐Based Chemosensor with Application in a Colorimetric Paper Strip for Selective Detection of Cu2+

Metallochromic Hydrazone‐Based Chemosensor with Application in a Colorimetric Paper Strip for Selective Detection of Cu2+

Preparation of microfibrillated cellulose/polyvinyl alcohol test strip integrated with novel chemosensor for colorimetric determination of diisopropyl fluorophosphate

Chiral Metal‐Organic Frameworks with Spectroscopic Methods: Towards Chemical Sensor Devices

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Metallochromic Hydrazone‐Based Chemosensor with Application in a Colorimetric Paper Strip for Selective Detection of Cu²⁺

Metallochromic Hydrazone‐Based Chemosensor with Application in a Colorimetric Paper Strip for Selective Detection of Cu²⁺