The radiolysis of poly(4-vinylpyridine) quaternary salt ion exchange resins

Enomoto, Kazuyuki; LaVerne, Jay A.; Tandon, Lav; Enriquez, Alejandro E.; Matonic, John H.

doi:10.1016/j.jnucmat.2007.05.032

Cited by 10 publications

(6 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The nitrate form of Amberlite™ IRA400 (AmbNO 3 ) was prepared by anion exchange in AmbCl using aluminum nitrate Al(NO 3 ) 3 [11]. Five grams of AmbCl deposited on a glass filter were treated with an aqueous 0.1 M solution of aluminum nitrate.…”

Section: Methodsmentioning

confidence: 99%

“…3). Radiolytic decomposition of resins representing the Reillex™ family has been studied in length before, however, H 2 formation studies at high water content was not performed in that work [11]. The pulse radiolysis study of pyridinium salts in aqueous solutions, which mimic the core functionality of Reillex™ resins, reveal that pyridinium systems rapidly scavenge solvated electrons as well as hydrogen atoms known to be precursors of H 2 [24].…”

Section: Water Loading and H 2 Productionmentioning

confidence: 99%

“…Among more recent reports on the subject is a detailed study of poly(4-vinylpyridine) based ion exchange resins [11]. The radiation-chemical yields of gaseous products were determined in this work and a variety of spectroscopic methods were employed to follow the changes in resins upon irradiation.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Radiation-induced decomposition of anion exchange resins

Baidak

LaVerne

2010

Journal of Nuclear Materials

Self Cite

View full text Add to dashboard Cite

Section: Methodsmentioning

confidence: 99%

Section: Water Loading and H 2 Productionmentioning

confidence: 99%

See 1 more Smart Citation

Radiation-induced decomposition of anion exchange resins

Baidak

LaVerne

2010

Journal of Nuclear Materials

Self Cite

View full text Add to dashboard Cite

“…2-Vinylpyridine (2-VP) is a polar vinyl monomer containing a nitrogen heteroatom. Its homopolymers and copolymer have wide applications in many fields, including photochemistry, ion exchange resins, and self-assembling materials. − Poly(2-vinylpyridine) (P2VP) can be obtained through various methods, including free radical polymerization, anionic polymerization, , coordination polymerization, − and Lewis pair polymerization . Unfortunately, the synthesis of P2VP through stereoselective polymerization has received little attention, though the first attempt appeared in 1960 by Natta et al using magnesium amide-catalyzed anionic polymerization.…”

Section: Introductionmentioning

confidence: 99%

From Stereochemically Tunable Homopolymers to Stereomultiblock Copolymers: Lewis Base Regulates Stereochemistry in the Coordination Polymerization of 2-Vinylpyridine

Chen

2018

Macromolecules

View full text Add to dashboard Cite

Excellent isoselectivity (mmmm > 99%) and high activity (TOF > 4000 h −1 ) were achieved for the first time in the polymerization of the polar 2-vinylpyridine by using the s i m p l e l u t e t i u m -b a s e d c a t a l y s t s , L u -(CH 2 SiMe 3 ) 3 (THF) x (Py) 2−x (x = 0, 1, 2). The isoselectivity (mm) of the polymer could be varied between 37% and 99% through simply altering the quantity of Lewis base (tetrahydrofuran, 1,4-diazabicyclo[2.2.2]octane, 3-bromopyridine, and pyridine) added. Moreover, a novel method for preparing isotactic−atactic stereomultiblock poly(2vinylpyridine)s was developed by the addition and removal of THF during polymerization. The polymerization process including stereoselective control mechanism was deduced by DFT calculations.

show abstract

“…The plutonium recovery processes can lead to the formation of potentially explosive gases due to the self-radiolysis of water. Molecular hydrogen formation is especially important because enhancement of its yield can cause serious engineering and management problems. ,− Studies have examined the production of molecular hydrogen from pyridinium-based resins, but little is known about the basic chemistry of this class of compounds. Fundamental kinetic information on the reactions of pyridinium salts in aqueous solutions provides mechanistic details that can be applied to other compounds containing multiple components of different reactivity.…”

Section: Introductionmentioning

confidence: 99%

Reactions of Hydrated Electrons with Pyridinium Salts in Aqueous Solutions

Enomoto

LaVerne

2008

J. Phys. Chem. A

Self Cite

View full text Add to dashboard Cite

Rate coefficients for the reactions of the hydrated electron (e(aq)(-)) with pyridinium salts in aqueous solutions have been determined using pulse radiolysis techniques. The rate coefficients for pyridine, 1-hydropyridinium chloride, and 1-hydropyridinium nitrate were observed to be 1.4 x 10(10), 4.5 x 10(10), and 5.3 x 10(10) M(-1) s(-1), respectively. The e(aq)(-) was found to primarily attack the pyridine ring, the proton coordinated to the nitrogen atom, and the nitrate counterion, but not the chloride. Results for the corresponding dimer structures of 4,4'-dipyridyl, 1,1'-dihydro-4,4'-bipyridinium dichloride, and 1,1'-dihydro-4,4'-bipyridinium dinitrate had similar trends for e(aq)(-) attack sites. The rate coefficients for pyridinium salts were lower when the pyridinium nitrogen atom is coordinated to a methyl group rather than to a proton. This reduction is probably due to the increase in electron density of the pyridine ring due to the electron-donating methyl group. Pyridinium salts are not major contributors to the production of molecular hydrogen in the radiolysis of aqueous solutions and actually decrease molecular hydrogen yield due to scavenging reactions of the e(aq)(-). The yield of molecular hydrogen decreases from 0.45 to approximately 0.2 molecule/(100 eV) over the scavenging capacity range for the e(aq)(-) of 10(5)-10(9) s(-1). Absorption spectra of the transient species produced by the reactions of pyridinium salts with OH radical and H atom formed in water radiolysis were observed, and rate coefficients for these reactions were determined.

show abstract

The radiolysis of poly(4-vinylpyridine) quaternary salt ion exchange resins

Cited by 10 publications

References 42 publications

Radiation-induced decomposition of anion exchange resins

Radiation-induced decomposition of anion exchange resins

From Stereochemically Tunable Homopolymers to Stereomultiblock Copolymers: Lewis Base Regulates Stereochemistry in the Coordination Polymerization of 2-Vinylpyridine

Reactions of Hydrated Electrons with Pyridinium Salts in Aqueous Solutions

Contact Info

Product

Resources

About