Tailor-made polymer beads for gallic acid recognition and separation

Nicolescu, Tanta-Verona; Meouche, Walid; Branger, Catherine; Margaillan, André; Sârbu, Andrei; Donescu, Dan

doi:10.1007/s10965-012-0002-7

Cited by 13 publications

(6 citation statements)

References 61 publications

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“…The Specific GA binding by imprinted beads as compared to non-imprinted beads can be expressed by competitive adsorption test [ 7 ]. The competitive binding of GA was evaluated with syringic acid as a competitive template.…”

Section: Resultsmentioning

confidence: 99%

“…The distribution coefficient, K d (mL/g) was calculated by using Eq. 2 as follows: where C i (g/L) and C f (g/L) are the initial and final concentration of same component, m p (g) is the amount of polymer beads, and V s (L) is the volume of the feed solution [ 7 ].…”

Section: Methodsmentioning

confidence: 99%

“…The selectivity coefficient (k GA - C ) was calculated by using Eq. 3 as follows: where K d,GA and K d,C are the distribution coefficient of gallic acid and syringic acid, respectively [ 7 ].…”

Section: Methodsmentioning

confidence: 99%

“…According to Nicolescu et al [ 7 ], relative selectivity coefficients, K′ can be calculated by using Eq. 4 .…”

Section: Methodsmentioning

confidence: 99%

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Synthesis of molecular imprinting polymers for extraction of gallic acid from urine

Bhawani

Sen

Ibrahim

2018

Chemistry Central Journal

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The molecularly imprinted polymers for gallic acid were synthesized by precipitation polymerization. During the process of synthesis a non-covalent approach was used for the interaction of template and monomer. In the polymerization process, gallic acid was used as a template, acrylic acid as a functional monomer, ethylene glycol dimethacrylate as a cross-linker and 2,2′-azobisisobutyronitrile as an initiator and acetonitrile as a solvent. The synthesized imprinted and non-imprinted polymer particles were characterized by using Fourier-transform infrared spectroscopy and scanning electron microscopy. The rebinding efficiency of synthesized polymer particles was evaluated by batch binding assay. The highly selective imprinted polymer for gallic acid was MIPI1 with a composition (molar ratio) of 1:4:20, template: monomer: cross-linker, respectively. The MIPI1 showed highest binding efficiency (79.50%) as compared to other imprinted and non-imprinted polymers. The highly selective imprinted polymers have successfully extracted about 80% of gallic acid from spiked urine sample.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…According to Nicolescu et al [ 7 ], relative selectivity coefficients, K′ can be calculated by using Eq. 4 .…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Synthesis of molecular imprinting polymers for extraction of gallic acid from urine

Bhawani

Sen

Ibrahim

2018

Chemistry Central Journal

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“…Among these types of analyses, an important role is represented by thermal analysis. The thermal methods most often used for MIP characterization are the thermogravimetric analysis (TG), sometimes coupled with mass spectrometry (MS) or Fourier transform infrared spectroscopy (FT-IR), the differential scanning calorimetry (DSC), pyrolysis, and dynamic mechanical thermal analysis (DMTA) [7][8][9][10][11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Thermal analyses as tools for proving the molecular imprinting with diosgenin and sclareol in acrylic copolymer matrices

Dima

Nicolae

Iordache

et al. 2015

J Therm Anal Calorim

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Thermogravimetric analysis (TG), derivative thermogravimetry (DTG), differential scanning calorimetry (DSC), dynamic mechanical thermal analysis, simultaneous differential thermogravimetry (SDT) coupled with mass spectrometry (MS), and pyrolysis coupled with gas chromatography/mass spectrometry (Py-GC/MS) were used to characterize molecularly imprinted polymers (MIPs) obtained with two anti-cancerous template molecules, diosgenin and sclareol, imprinted in acrylonitrileacrylic acid copolymer matrices. First of all, TG analyses revealed a specific mass loss in the temperature range 220-300°C characteristic to diosgenin-MIPs, while for the sclareol-MIPs, the specific interval was 100-240°C. Further, the DSC analyses evidenced two major aspects: first, that the copolymer matrices have a single glass transition temperature (T g ), which confirms the random statistic copolymer structure, an essential characteristic of a homogenous MIP matrix; secondly, both templates influence the T g values of the MIPs, fact that is an additional proof of molecular imprinting. The SDT results confirmed the TG and DSC results and, additionally, proved that the system with higher acrylic acid content generates stronger template-matrix interactions via hydrogen, van der Waals, and other non-covalent forces, fact that appears as an increased thermal stability on the TG curve and a higher maximum for template decomposition on the DTG curve. The MS results evidenced that a single mass fragment, 139 ± 1 m/z, characteristic for the class of steroid sapogenines of which diosgenin belongs, is enough to prove, qualitatively and quantitatively, the molecular imprinting and the template elution. As global conclusion, the applied thermal analyses proved to be exceptional tools for analyzing these molecularly imprinted polymers.

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Synthesis and characterization of a novel polyurethane curing agent modified by a diazafluorene derivative

Zhou

Chen

et al. 2018

J of Applied Polymer Sci

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In this study, we synthesized a novel polyurethane (PU) curing agent (CA) modified by the diazafluorene derivative, 9,9′‐di(4‐hydroxyphenyl)‐9‐1H‐4,5‐diazafluorene, at different hydroxyl ratios. The results of 1H‐NMR and Fourier transform infrared spectroscopy proved the structure of the fluorine derivative and the modification of CAs. Differential scanning calorimetry and dynamic mechanical analysis showed that the glass‐transition temperature of the PU increased with the addition of the diazafluorene derivative, and the PU cured in the novel CA had more stable and better damping properties under moderate‐temperature conditions (30–80 °C) than the PU cured in the N75 CA. Tan δ was maintained in a relatively lower range shift in the moderate‐temperature range. The average adhesion values of the PU coating cured in the novel CA increased. The scanning electron microscopy morphologies of the PU film and the average adhesion of the coatings showed that the PU cured in the novel CA had good mechanical properties. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46591.

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Tailor-made polymer beads for gallic acid recognition and separation

Cited by 13 publications

References 61 publications

Synthesis of molecular imprinting polymers for extraction of gallic acid from urine

Synthesis of molecular imprinting polymers for extraction of gallic acid from urine

Thermal analyses as tools for proving the molecular imprinting with diosgenin and sclareol in acrylic copolymer matrices

Synthesis and characterization of a novel polyurethane curing agent modified by a diazafluorene derivative

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