A nanosized cadmium(II)-imprinted polymer for use in selective trace determination of cadmium in complex matrices

Behbahani, Mohammad; Barati, Mojgan; Bojdi, Majid Kalate; Pourali, Ali Reza; Bagheri, Abbas; Tapeh, Nasim Akbari Ghareh

doi:10.1007/s00604-013-1036-1

Cited by 63 publications

(29 citation statements)

References 18 publications

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“…ions, the thermal stability of the unleached ionimprinted polymer is higher. Similar studies were made by Behbahani et al [46] for obtaining cadmium-imprinted polymers. In this case, the TG/DTG analyses performed on thin-film samples in nitrogen atmosphere and temperature range of 10-800°C showed several exothermic peaks in the case of the unleached and leached ion-imprinted polymers.…”

Section: Introductionsupporting

confidence: 65%

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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Section: Introductionsupporting

confidence: 65%

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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“…The results showed that the MICT composite was an ideal platform to accelerate the disposal of heavy metals and organic pollutants in wastewater. Pourali et al 164 described a nanosized Cd(II)-imprinted polymer for selective SPE and pre-concentration of Cd(II) in food and water samples. Besides the above, Cd(II) imprinted materials also have certain developments in sensors.…”

Section: Tablementioning

confidence: 99%

Current status and challenges of ion imprinting

et al. 2015

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Ion imprinting technology (IIT) aims to recognize ions while retaining the unique virtues of molecular imprinting technology (MIT), namely structure predictability, recognition specificity and application universality. Owing to special coordination or electrostatic interactions, ion imprinted polymers (IIPs) are generally compatible with aqueous media and have advantages over most molecularly imprinted polymers (MIPs). IIPs can achieve effective identification of water-soluble ions, especially heavy metals and radioactive elements that cause increasing concerns. The purpose of this review is to summarize recent advances of ion imprinting, focusing on the current status and challenges in fundamentals and applications that involve almost all types of ions and ion-related molecular imprinting. In addition, various smart strategies are highlighted, such as surface imprinting, stimuli-responsive imprinting, dual/ multiple components imprinting, click chemistry, and microwave-assisted heating. In this review, the elemental periodic table is first utilized as a template to introduce ion classification standards for various IIPs, including main groups, transition elements, actinides, rare earths, metalloids, anion imprinting and secondary imprinting. Finally, the challenges and possible solution strategies plus future trends are also proposed (302 references).

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“…Consequently, the consideration of researchers has moved toward achieving highly uniform spherical imprinted particles, particularly on the nanoscale [30]. In contrast to monoliths, MIPs possess cavities designed for a target analyte, providing a retention mechanism based on molecular recognition; by this, imprinted cavities are more easily available to templates and the binding kinetic is increased [31][32][33][34][35]. Different methods are used to obtain MIPs Nano particles, namely suspension, multistep swelling and precipitation polymerization.…”

Section: Introductionmentioning

confidence: 99%

A palladium imprinted polymer for highly selective and sensitive electrochemical determination of ultra-trace of palladium ions

Bojdi

Behbahani

Sahragard

et al. 2014

Electrochimica Acta

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A nanosized cadmium(II)-imprinted polymer for use in selective trace determination of cadmium in complex matrices

Cited by 63 publications

References 18 publications

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

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

Current status and challenges of ion imprinting

A palladium imprinted polymer for highly selective and sensitive electrochemical determination of ultra-trace of palladium ions

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