Ion pairs in macroreticular polystyrene resins. 2. EPR study using cation spin-labels

Jimmy S. Hwang; Samuel J. Lyle

doi:10.1021/j100201a072

Ion pairs in macroreticular polystyrene resins. 2. EPR study using cation spin-labels

Jimmy S. Hwang^*, Samuel J. Lyle

^*Corresponding author for this work

King Fahd University of Petroleum & Minerals

Research output: Contribution to journal › Article › peer-review

Abstract

An EPR study using commercially available macroreticular resins (XAD-2 and XAD-4) coated and labeled with cationic probes 4-[(N,N-dimethyl-n-nonyl)ammonio]-2,2,6,6-tetramethylpiperidin-1-oxyl bromide and 4-[(N,N-dimethyl-n-hexadecyl)ammonio]-2,2,6,6-tetramethylpiperidin-1-oxyl iodide is reported. The nitrogen hyperfine coupling constants along the z direction, A_z, were determined at 77 K. Rotational relaxation times and anisotropy of rotation were obtained based on procedures developed in part 1. The data are consistent with a model in which the cations are "anchored" to the resin framework through their hydrocarbon chains and the anionic components occupy an outer region within the resin pores with water occupying the polar ionic regions around the ion pairs.

Original language	English
Pages (from-to)	9079-9083
Number of pages	5
Journal	Journal of Physical Chemistry
Volume	96
Issue number	22
DOIs	https://doi.org/10.1021/j100201a072
State	Published - 1992

ASJC Scopus subject areas

General Engineering
Physical and Theoretical Chemistry

Access to Document

10.1021/j100201a072

Cite this

@article{fc542014a1c34ce6bc60ad19cc3d0dc6,

title = "Ion pairs in macroreticular polystyrene resins. 2. EPR study using cation spin-labels",

abstract = "An EPR study using commercially available macroreticular resins (XAD-2 and XAD-4) coated and labeled with cationic probes 4-[(N,N-dimethyl-n-nonyl)ammonio]-2,2,6,6-tetramethylpiperidin-1-oxyl bromide and 4-[(N,N-dimethyl-n-hexadecyl)ammonio]-2,2,6,6-tetramethylpiperidin-1-oxyl iodide is reported. The nitrogen hyperfine coupling constants along the z direction, Az, were determined at 77 K. Rotational relaxation times and anisotropy of rotation were obtained based on procedures developed in part 1. The data are consistent with a model in which the cations are {"}anchored{"} to the resin framework through their hydrocarbon chains and the anionic components occupy an outer region within the resin pores with water occupying the polar ionic regions around the ion pairs.",

author = "Hwang, {Jimmy S.} and Lyle, {Samuel J.}",

year = "1992",

doi = "10.1021/j100201a072",

language = "English",

volume = "96",

pages = "9079--9083",

journal = "Journal of Physical Chemistry",

issn = "0022-3654",

publisher = "American Chemical Society",

number = "22",

}

TY - JOUR

T1 - Ion pairs in macroreticular polystyrene resins. 2. EPR study using cation spin-labels

AU - Hwang, Jimmy S.

AU - Lyle, Samuel J.

PY - 1992

Y1 - 1992

N2 - An EPR study using commercially available macroreticular resins (XAD-2 and XAD-4) coated and labeled with cationic probes 4-[(N,N-dimethyl-n-nonyl)ammonio]-2,2,6,6-tetramethylpiperidin-1-oxyl bromide and 4-[(N,N-dimethyl-n-hexadecyl)ammonio]-2,2,6,6-tetramethylpiperidin-1-oxyl iodide is reported. The nitrogen hyperfine coupling constants along the z direction, Az, were determined at 77 K. Rotational relaxation times and anisotropy of rotation were obtained based on procedures developed in part 1. The data are consistent with a model in which the cations are "anchored" to the resin framework through their hydrocarbon chains and the anionic components occupy an outer region within the resin pores with water occupying the polar ionic regions around the ion pairs.

AB - An EPR study using commercially available macroreticular resins (XAD-2 and XAD-4) coated and labeled with cationic probes 4-[(N,N-dimethyl-n-nonyl)ammonio]-2,2,6,6-tetramethylpiperidin-1-oxyl bromide and 4-[(N,N-dimethyl-n-hexadecyl)ammonio]-2,2,6,6-tetramethylpiperidin-1-oxyl iodide is reported. The nitrogen hyperfine coupling constants along the z direction, Az, were determined at 77 K. Rotational relaxation times and anisotropy of rotation were obtained based on procedures developed in part 1. The data are consistent with a model in which the cations are "anchored" to the resin framework through their hydrocarbon chains and the anionic components occupy an outer region within the resin pores with water occupying the polar ionic regions around the ion pairs.

UR - http://www.scopus.com/inward/record.url?scp=33751391216&partnerID=8YFLogxK

U2 - 10.1021/j100201a072

DO - 10.1021/j100201a072

M3 - Article

AN - SCOPUS:33751391216

SN - 0022-3654

VL - 96

SP - 9079

EP - 9083

JO - Journal of Physical Chemistry

JF - Journal of Physical Chemistry

IS - 22

ER -

Ion pairs in macroreticular polystyrene resins. 2. EPR study using cation spin-labels

Abstract

ASJC Scopus subject areas

Access to Document

Fingerprint

Cite this