Methacrylate copolymers with pendant piperazinedione-sensing motifs as fluorescent chemosensory materials for the detection of Cr(VI) in aqueous media

Vallejos, Saúl; Muñoz, Asunción; García, Félix C.; Serna, Felipe; Ibeas, Saturnino; García, José Miguel

doi:10.1016/j.jhazmat.2012.05.047

Cited by 13 publications

(7 citation statements)

References 12 publications

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“…It was observed that the blue emission of N-GQDs could be strongly quenched in the presence of Cr(VI), likely through the interaction between the -OH group and/or -NH group on the N-GQDs and the aqueous Cr(VI) anions. 23 Some other common ions, including Fe 3+ , Ca 2+ , Ni 2+ , Cr 3+ , Cd 2+ , Cu 2+ , Pb 2+ , Zn 2+ , Mg 2+ , Mn 2+ , Al 3+ , Na + , K + , Au 3+ , Ba 2+ , Co 2+ , Hg 2+ , NO 3…”

Section: Introductionmentioning

confidence: 99%

A simple one-pot synthesis of highly fluorescent nitrogen-doped graphene quantum dots for the detection of Cr(vi) in aqueous media

et al. 2014

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A new method for selective determination of Cr(VI) in environmental water samples was developed based on its quenching effect on the fluorescent N-doping graphene quantum dots (N-GQDs). The N-GQDs were synthesized by a simple one-step method using citric acid as the carbon source and ammonia as the nitrogen source with a 65% yield, showing that mass production of the N-GQDs is possible. The obtained N-GQDs with oxygen-rich functional groups exhibited a strong blue emission with a quantum yield of 18.6%, which was 7 times greater than that of graphene quantum dots (GQDs). Due to the selective coordination to Cr(VI), the N-GQDs can be used as a green and facile sensing platform for label-free sensitive and selective detection of Cr(VI) ions in aqueous solution and real water samples.Compared to GQDs, the N-GQDs as a fluorescent probe promises much improved selectivity for sensing of Cr(VI). The N-GQDs fluorescence probe shows a sensitive response to Cr(VI) in a wide concentration range of 0-140 mM with a detection limit of 40 nM. The N-GQDs-based fluorescence method was successfully used to selectively detect Cr(VI), and discriminate it and Cr(III) as well in aqueous samples.

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Section: Introductionmentioning

confidence: 99%

A simple one-pot synthesis of highly fluorescent nitrogen-doped graphene quantum dots for the detection of Cr(vi) in aqueous media

et al. 2014

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“…[12][13][14][15][16][17][18][19][20][21]. PVP has high chemical stability, good film forming properties and adherence to different substrates and, at the same time, low toxicity and complexing ability.…”

Section: Introductionmentioning

confidence: 99%

Relaxational study of poly(vinylpyrrolidone-co-butyl acrylate) membrane by dielectric and dynamic mechanical spectroscopy

Redondo-Foj¹,

Carsí²,

Ortiz-Serna³

et al. 2013

J. Phys. D: Appl. Phys.

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A poly(vinylpyrrolidone-co-butyl acrylate) (60VP-40BA) membrane has been synthesized as a tractable and hydrophilic material, obtaining a water swelling percentage around 60%. An investigation of molecular mobility by means of Differential Scanning Calorimetry (DSC), Dynamic Mechanical Analysis (DMA) and Broadband Dielectric Relaxation Spectroscopy (DRS) has been fulfilled in the dry membrane. Dielectric and viscoelastic relaxation measurements have been carried out on the 60VP-40BA sample at several frequencies between -150ºC to 150ºC .The dielectric spectrum shows several relaxation processes labelled as γ, β and α in increasing order of temperature, whereas in the mechanical spectrum only the β and α relaxation processes are completely defined. In the dielectric measurements, conductive contributions overlap the α-relaxation. The apparent activation energies have similar values for the β-relaxation in both, the mechanical and the dielectric measurements. The β process is related to the local motions of the pyrrolidone group and the γ process is connected with the butyl units motions, both located in the side chains of the polymer.

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“…as an anchorage monomer providing pendant aniline groups to the polymeric structure. The main comonomers (VP, hydrophilic; MMA, hydrophobic) provide the polymer films with the correct hydrophilicity balance needed for sensory purposes in aqueous media, i.e., the ability to swell in water without losing mechanical behavior in the swollen state [34,35].…”

Section: Resultsmentioning

confidence: 99%

Polymer films containing chemically anchored diazonium salts with long-term stability as colorimetric sensors

Bustamante

Vallejos

Pascual-Portal

et al. 2019

Journal of Hazardous Materials

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Highlights  Film shaped sensory polymeric materials change their color in presence of phenols  The polymers main chains have pendant diazonium moieties  The sensory materials are manageable and stable along time  The detection is achieved visually and also using pictures taken with smartphones  The limits of detection were of the order of ppb Abstract We have prepared polymeric films as easy-to-handle sensory materials for the colorimetric detection and quantification of phenol derivatives (phenols) in water. Phenols in water resources result from their presence in pesticides and fungicides, among other goods, and are harmful ecotoxins. Colorless polymeric films with pendant diazonium groups attached to the acrylic polymer structure were designed and harmful phenols water media

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Methacrylate copolymers with pendant piperazinedione-sensing motifs as fluorescent chemosensory materials for the detection of Cr(VI) in aqueous media

Cited by 13 publications

References 12 publications

A simple one-pot synthesis of highly fluorescent nitrogen-doped graphene quantum dots for the detection of Cr(vi) in aqueous media

A simple one-pot synthesis of highly fluorescent nitrogen-doped graphene quantum dots for the detection of Cr(vi) in aqueous media

Relaxational study of poly(vinylpyrrolidone-co-butyl acrylate) membrane by dielectric and dynamic mechanical spectroscopy

Polymer films containing chemically anchored diazonium salts with long-term stability as colorimetric sensors

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