Amine-rich polymers for water purification applications

Elhalwagy, M.E.; Elsherbiny, A.S.; Gemeay, A.H.

doi:10.1016/j.mtchem.2022.101344

Cited by 7 publications

(10 citation statements)

References 193 publications

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“…Because CdS nanorods were prepared by a hydrothermal method using ethylenediamine as surfactant under 160 °C for 48 h, the amine ions left on the CdS surface could lead to its surface with positive charges, which was also reported in previous literatures on amine‐functionalized catalysts. [ 25–27 ] The existence of amino groups on CdS was further proved by Fourier transform infrared (FTIR) spectra (Figure S2, Supporting Information). The broad absorption peak at 3150–3500 cm −1 is ascribed to the stretching vibrations of N─H bonds.…”

Section: Resultsmentioning

confidence: 99%

In Situ Quantitative Study of Single‐Molecule Photoreduction Activities and Kinetics on 1D–1D Heterostructure

Wu,

Lee,

Tan

et al. 2023

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Understanding the underlying catalytic mechanisms with nanometer resolution is of critical importance to the rational design of 1D heterogeneous catalysts. However, a fundamental investigation of photocatalytic activities and kinetics at their individual sites is still challenging. Herein, in situ single‐molecule fluorescence microscopy is employed to study the site‐specific catalytic activities and dynamics on 1D–1D heterostructure for the first time. For carbon nanotube (CNT)/CdS nanorod composites, it is found that the CdS end with heterojunction exhibits the highest catalytic conversion rate constant of resazurin photoreduction, which is 30%, 7%, and 19% higher than those of the middle segment and the bare end of CdS, and the CNT end with heterojunction, respectively. A similar trend of adsorption abilities is observed in these structures. Such phenomena can be attributed to the different content of defects in these structures. Regarding the dissociation behaviors, the dissociation rate constants of all structures exhibit an opposite trend to those of adsorption and conversion. The direct and indirect dissociation are found to be predominant on CdS and CNT, respectively. Such investigation provides a deep insight into the understanding of site‐specific properties on 1D heterogeneous catalysts and helps construct the “structure‐dynamics” correlations at the nanoscale.

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Section: Resultsmentioning

confidence: 99%

In Situ Quantitative Study of Single‐Molecule Photoreduction Activities and Kinetics on 1D–1D Heterostructure

Wu,

Lee,

Tan

et al. 2023

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“…They should not only be stable during and after the initial polymerization, but they should also have high reactivity for post-polymerization crosslinking. [51][52][53] Generally, isocyanates, 56 amines, 57 and epoxides 54 are some of the suitable functional groups that have been extensively explored for postpolymerization crosslinking resulting in polymer networks with unique properties for targeted applications. An industrially relevant example of post polymerization crosslinking is the vulcanization of rubber which involves crosslinking of polyisoprene (rubber) with sulfur to obtain a material with improved durability (Scheme 11).…”

Section: Polymer Chemistry Tutorial Reviewmentioning

confidence: 99%

“…They should not only be stable during and after the initial polymerization, but they should also have high reactivity for post-polymerization crosslinking. 51–53 Generally, isocyanates, 56 amines, 57 and epoxides 54 are some of the suitable functional groups that have been extensively explored for post-polymerization crosslinking resulting in polymer networks with unique properties for targeted applications.…”

Section: Post Polymerization Crosslinkingmentioning

confidence: 99%

Educational series: turning monomers into crosslinked polymer networks

Weerasinghe,

Dodo,

Rajawasam

et al. 2023

Polym. Chem.

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“…Amine-functionalized polymers have diverse applications, ranging from CO 2 uptake, , water treatment, and fuel-cell technologies to antimicrobial, , self-healing, , and adhesive materials (Figure a). Improved methods for their production are of keen interest.…”

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confidence: 99%

“…Improved methods for their production are of keen interest. Cationic and radical polymerization are among the more common synthetic methodologies, despite limitations arising from water-sensitivity and/or molecular weight control. Ring-opening metathesis polymerization (ROMP), an exceptionally versatile alternative methodology for the assembly of functionalized polymers, , is attractive for its operational simplicity.…”

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confidence: 99%

Probing Catalyst Degradation in Metathesis of Internal Olefins: Expanding Access to Amine-Tagged ROMP Polymers

Cormier,

Fogg

2023

ACS Catal.

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Ruthenium-promoted ring-opening metathesis polymerization (ROMP) offers potentially powerful routes to amine-functionalized polymers with antimicrobial, adhesive, and self-healing properties. However, amines readily degrade the methylidene and unsubstituted ruthenacyclobutane intermediates formed in metathesis of terminal olefins. Examined herein is the relevance of these decomposition pathways to ROMP (i.e., metathesis of internal olefins) by the third-generation Grubbs catalyst. Primary alkylamines rapidly quench polymerization via fast adduct formation, followed by nucleophilic abstraction of the propagating alkylidene. Bulkier, Brønsted-basic amines are less aggressive: attack competes only for slow polymerization or strong bases (e.g., DBU). Added HCl limits degradation, as demonstrated by the successful ROMP of an otherwise intractable methylamine monomer.

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Amine-rich polymers for water purification applications

Cited by 7 publications

References 193 publications

In Situ Quantitative Study of Single‐Molecule Photoreduction Activities and Kinetics on 1D–1D Heterostructure

In Situ Quantitative Study of Single‐Molecule Photoreduction Activities and Kinetics on 1D–1D Heterostructure

Educational series: turning monomers into crosslinked polymer networks

Probing Catalyst Degradation in Metathesis of Internal Olefins: Expanding Access to Amine-Tagged ROMP Polymers

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