Synthesis and characterization of poly (ionic liquid) derivatives of N-alkyl quaternized poly(4-vinylpyridine)

Briones, Ximena; Tapia, Ricardo A.; Campodónico, Paola R.; Urzúa, Marcela; Leiva, Ángel; Contreras, Renato; González-Navarrete, Javier

doi:10.1016/j.reactfunctpolym.2018.01.003

Cited by 21 publications

(6 citation statements)

References 33 publications

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“…There is also a band at ~812 cm −1 , characterizing the bending vibrations of the para-substituted pyridine ring. Note that the band at ~1640 cm −1 is the characteristic absorption band of the quaternized pyridinium group [ 30 , 31 ]. Other bands at about 3000 cm −1 and in the range 1600–1400 cm −1 belong to vibrations of aromatic or pyridinium rings entering into polymer structure.…”

Section: Resultsmentioning

confidence: 99%

Reversible Sorptive Preconcentration of Noble Metals Followed by FI-ICP-MS Determination

et al. 2022

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In this paper, we propose the combined procedure of noble metal (NM) determination, including fire assay, acid digestion, and reversible dynamic sorptive preconcentration, followed by flow-injection ICP-MS. Reversible preconcentration of all NMs was carried out using micro-column packed new PVBC-VP sorbent and elution with a mixture of thiourea, potassium thiocyanate, and HCl, which recovers Pd, Ir, Pt, and Au by 95% and Ru, and Rh by 90%. The proposed procedure was approved using certified reference materials.

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Section: Resultsmentioning

confidence: 99%

Reversible Sorptive Preconcentration of Noble Metals Followed by FI-ICP-MS Determination

et al. 2022

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“…In general, two main strategies have been used for the synthesis of PILs: the first one consists of direct polymerization of IL monomers bearing different counter-anions [19][20][21][22] and the second one relays on chemical modification of existing polymers by anion exchange reaction. [23][24][25] Both synthetic routes have been already applied for the preparation of various pyrrolidinium-based PIL. [26,27] In the present work, we synthesized pyrrolidinium-based PILs by applying the anion exchange method to a poly(diallyl methyl ammonium iodide).…”

Section: Resultsmentioning

confidence: 99%

Modular Platform for Synthesis of Poly(Ionic Liquid) Electrolytes for Electrochemical Applications in Supercapacitors

et al. 2021

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Pyrrolidinium based poly(ionic liquids) (PIL) are successfully obtained and characterized. Special attention is paid to the detailed characterization of the polymer products to determine their molecular-mass characteristics and to establish the composition-property relationship when selecting polymer electrolytes suitable for electrochemical tests. Characterization is performed using: chromatographic methods-combined gel permeation chromatography (GPC) with triple detection-refractometry, UV and laser light scattering; spectroscopy methods-Fourier transform infrared (FTIR), proton (1H) NMR spectro-scopy; thermogravimetric analysis (TGA) and TGA/gas chromatography (GC)/mass selective detection (MSD). Supercapacitors based on commercial activated carbon, with electrolyte containing PIL dissolved in dimethylformamide (DMF) have been developed and preliminary charge/discharge galvanostatic tests in a two-electrode supercapacitor cell as well as an assessment of electrodes material and its stability in the polymeric ionic electrolyte were conducted. The PIL supercapacitor demonstrates stable capacitance characteristics and is promising for further studies in this direction.

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“…In recent years, due to the development of poly(ionic liquids) (PILs), the TFSI molecule, along with many others, has been tested as counterions of polycationic species. Particularly, and very related to this work, Briones et al [ 39 ] have synthetized and evaluated the properties of novel poly(ionic liquids) prepared from quaternized poly(4-vinylpyridine) and different counterions, TFSI being one of them. Based on the above, we can stipulate that alkylated PyMDA moieties containing TFSI counterions could be considered as an ionic liquid-like structure, and therefore, the polyelectrolytes obtained in this work could be considered as poly(ionic liquids).…”

Section: Resultsmentioning

confidence: 99%

Novel Polyelectrolytes Obtained by Direct Alkylation and Ion Replacement of a New Aromatic Polyamide Copolymer Bearing Pyridinyl Pendant Groups

et al. 2021

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The following work shows, for the first time, the synthesis and characterization of a new family of polyelectrolytes, along with their preliminary assessments in terms of desalin water treatment. These materials fall into the category of aromatic co-polyamides, which are obtained by the direct condensation of monomers 4,4′-oxydianiline (ODA), isophthaloyl chloride, and 3,5-diamino-N-(pyridin-4-ylmethyl)benzamide (PyMDA). Thereby, the charged nature exhibited by these materials was achieved through the quaternization of PyMDA moieties using linear iodoalkanes of different lengths (CnI with n = 1, 2, 4, and 6). After completing the quaternization process, polyelectrolytes were subjected to a one-step anion substitution process, where iodide counterions were replaced by bis(trifluoromethane)sulfonamide entities. For all the obtained materials, solubility tests were carried out, showing that those alkylated with methyl and ethyl chains exhibit high solubility in rutinary aprotic polar solvents, while those containing n-butyl and n-hexyl units resulted in the formation of insoluble gels. Due to the above, the latest were discarded from this study early on. The structural characterization of the initial neutral co-polyamide was carried out by means of infrared spectroscopy (FT-IR), nuclear magnetic resonance (1H, 13C-NMR), and size-exclusion chromatography (SEC), while the structure of methylated and ethylated polyelectrolytes was successfully confirmed through FT-IR, 1H, 13C, and 19F-NMR. Additionally, the thermal behavior of these materials was analyzed in terms of thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC), showing thermal degradation temperatures above 300 °C and glass transition temperatures (Tg) above 200 °C, resulting in polymers with outstanding thermal properties for water treatment applications. On the other hand, through the solvent-casting method, both neutral and charged polymers were found to be easily prepared into films, exhibiting a remarkably flexibility. The mechanical properties of the films were analyzed using the traction test, from which tensile strength values ranging between 83.5 and 87.9 Mpa, along with Young’s modulus values between 2.4 and 2.5 Gpa were obtained. Moreover, through contact angle measurements and absorption analysis by immersion, polyelectrolytes showed important changes in terms of affinity against polar and polar substances (water, n-heptane, and benzene), exhibiting a higher rejection regarding the neutral polymer. Finally, as a preliminary test against the seepage of saline waters, thin polymer films (from 11.4 to 17.1 µm) were deposited on top of commercial filter discs and tested as filters of saline solutions ([NaCl] = 1000 and 2000 ppm). These tests revealed a decrease of the salt concentration in the obtained filtrates, with retention values ranging between 6.2 and 20.3%, depending on the concentration of the former solution and the polymer used.

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Synthesis and characterization of poly (ionic liquid) derivatives of N-alkyl quaternized poly(4-vinylpyridine)

Cited by 21 publications

References 33 publications

Reversible Sorptive Preconcentration of Noble Metals Followed by FI-ICP-MS Determination

Reversible Sorptive Preconcentration of Noble Metals Followed by FI-ICP-MS Determination

Modular Platform for Synthesis of Poly(Ionic Liquid) Electrolytes for Electrochemical Applications in Supercapacitors

Novel Polyelectrolytes Obtained by Direct Alkylation and Ion Replacement of a New Aromatic Polyamide Copolymer Bearing Pyridinyl Pendant Groups

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