Chromophoric thin film based on cellulose triacetate blends for sensing metal ions

Abdelaal, Magdy Y.; Sobahi, Tariq R.; El‐Shishtawy, Reda M.

doi:10.1016/j.crci.2013.10.005

Cited by 7 publications

(5 citation statements)

References 34 publications

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“…One easy way to reveal the emission of the solid-state dyes, an optically transparent solid such as NaCl was used as a diluent for the dye, and 1 mm quartz cell was used for the solid mixture measurement. Likewise, in the thin film case, 69 the solid mixtures were placed in the quartz cell that was held in the cell holder in a diagonal position, and the fluorescence was measured at selected excitation wavelengths of the dye in DCM solution (see Table 1 ). Fig.…”

Section: Resultsmentioning

confidence: 99%

AIE and reversible mechanofluorochromism characteristics of new imidazole-based donor–π–acceptor dyes

et al. 2022

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Section: Resultsmentioning

confidence: 99%

AIE and reversible mechanofluorochromism characteristics of new imidazole-based donor–π–acceptor dyes

et al. 2022

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“…According to the literature, PVC and CTA are the polymers that provide the best results in the design of optical sensors [12,15,16]. While CTA is a biodegradable polar polymer with very good optical properties and capable of forming highly oriented hydrogen bonds, PVC is capable of creating intermolecular interactions because it is a relatively inexpensive polar polymer [3,15,17,18].…”

Section: Introductionmentioning

confidence: 99%

“…PIMs as membrane based optical sensors have been used to quantify different metals by spectrophotometry, spectrofluorometry, or color-intensity measurements, among others (e.g., Al(III) in lake and river water samples [3,13,14], Cu(II) in river water and isotonic seawater samples [13,29], Co(II) in tap water, seawater, and wastewater samples [6,27], Fe(III) in isotonic seawaters [29], Hg(II) in surface and groundwater samples [15,18], Pb(II) in plastic toys and tap water samples [33], Tl(I) in aqueous solution [17] and Zn(II) in pharmaceuticals samples, vitamin-mineral drinks, food supplements and foot health care products [12,29]).…”

Section: Introductionmentioning

confidence: 99%

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A Novel Polymer Inclusion Membrane-Based Green Optical Sensor for Selective Determination of Iron: Design, Characterization, and Analytical Applications

Sánchez-Ponce,

Casanueva-Marenco,

Díaz-de-Alba

et al. 2023

Polymers

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The design, characterization, and analytical application of a green optical sensor for the selective determination of Fe(II) ions is proposed. The sensor is based on the immobilization of the chromogenic reagent picolinaldehyde salicyloylhydrazone (SHPA) within a polymer inclusion membrane. To reduce solvent usage, the reagent was synthesized using a green mechanochemical procedure. The components for sensor preparation were optimized with a sequential simplex method and the optimal composition was found to be 0.59 g cellulose triacetate (base polymer), 0.04 g SHPA (chemosensor reagent), 4.9 mL dibutyl phthalate (plasticizer), and 38 mL dichloromethane (solvent). The conditions of iron analysis were also optimized resulting in pH 6 for aqueous solution, 90 min exposure time and 10 min short-term stability. The optical sensor showed a linear range from the limit of detection (0.48 µmol L−1) to 54 µmol L−1 Fe(II). The precision of the method was found to be 1.44% and 1.19% for 17.9 and 45 µmol L−1 Fe(II), respectively. The characteristics of the sensor allowed the design of a Fe(II)/Fe(III) speciation scheme. The methodology was successfully applied to the determination of iron in food preservatives, food additives, and dietary supplement. Additionally, the Fe speciation scheme was successfully applied to an agricultural fertilizer.

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“…The most interesting feature of 8-HQ is its very sensitive fluorescence in aqueous or organic solutions but the fluorescence enhancement occurrs upon cation binding and many metal chelates of 8-HQ exhibit intense fluorescence [ 15 , 16 , 17 , 18 , 19 ]. Recent studies indicated that the on–off fluorescence of 8-HQ upon its interaction with metal ions has been attributed to a proton transfer mechanism in which 8-HQ is weakly or nonfluorescent (off) due to an excited-state proton transfer (ESPT); upon binding with the metal ion, fluorescence appears (on), due to the inhibition of the ESPT process [ 15 , 20 ]. Thus, it is anticipated that the replacement of hydrogen atom with different groups may lead to a better fluorescence compared with 8-HQ owing to the absence of the ESPT process.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Theoretical Study of O-Substituent Effect on the Fluorescence of 8-Hydroxyquinoline

Zayed

El‐Shishtawy

Elroby

et al. 2015

IJMS

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The synthesis and characterization of different ether and ester derivatives of 8-hydroxyquinoline have been made. UV-visible and fluorescence spectra of these compounds have revealed spectral dependence on both solvent and O-substituent. The fluorescence intensity of ether derivatives revealed higher intensity for 8-octyloxyquinoline compared with 8-methoxyquinoline, whereas those of ester derivatives had less fluorescence than 8-hydroxyquinoline. Theoretical calculations based on Time-dependent density functional theory (TD-DFT) were carried out for the quinolin-8-yl benzoate(8-OateQ) compound to understand the effect of O-substituent on the electronic absorption of 8-hydroxyquinaline (8-HQ). The calculations revealed comparable results with those obtained from the experimental data. Optimized geometrical structure was calculated with DFT at B3LYP/6-311++G** level of theory. The results indicated that 8-OateQ is not a coplanar structure. The absorption spectra of the compound were computed in gas-phase and solvent using B3LYP and CAM-B3LYP methods with 6-311++G ** basis set. The agreement between calculated and experimental wavelengths was very good at CAM-B3LYP/6-311++G** level of theory.

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Chromophoric thin film based on cellulose triacetate blends for sensing metal ions

Cited by 7 publications

References 34 publications

AIE and reversible mechanofluorochromism characteristics of new imidazole-based donor–π–acceptor dyes

AIE and reversible mechanofluorochromism characteristics of new imidazole-based donor–π–acceptor dyes

A Novel Polymer Inclusion Membrane-Based Green Optical Sensor for Selective Determination of Iron: Design, Characterization, and Analytical Applications

Experimental and Theoretical Study of O-Substituent Effect on the Fluorescence of 8-Hydroxyquinoline

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